ANNEXURE 4 - SPECIFICATION the PRASA …. Annexure 6...GPS Global Positioning Satellite ... Laying and Hauling in of Communication Cables SPC-00033: Optical Fibre Testing ... ANNEXURE

ANNEXURE 4 - SPECIFICATION

Specification for the trenching of optical fibre cable,

erection of self-supporting optical fibre cable on trac-

tion masts, optical fibre accessories, for installations in

the PRASA environment.

Specification for trenching of optic fibre and for the erection of self-supporting optical

fibre cable on traction masts, optical fibre accessories for installations in the PRASA

environment.

NON-DISCLOSURE OF INFORMATION

Information contained in this document is proprietary in nature and/or protected by copyright.

Please obtain written permission from the Author prior to reproducing this document, in

whole or in part.






TABLE OF CONTENTS Part A: Erection of self-supporting optical fibre cable on traction masts. I ABBREVIATIONS, ACRONYMS AND DEFINITIONS............................................................................................5

II RELEVANT DOCUMENTATION APPLICABLE ....................................................................................................6

III RELEVANT DRAWINGS AND PHOTOS.................................................................................................................7

1. SCOPE AND PURPOSE..................................................................................................................................................8

2. SPECIFICATIONS AND DRAWINGS......................................................................................................................14

3. DESIGN AND APPROVAL..........................................................................................................................................15

4. SURVEY............................................................................................................................................................................19

5. INSTALLATION............................................................................................................................................................21

6. Tensioning......................................................................................................................................................................23

7. Cable Slack......................................................................................................................................................................24

8. Intermediate Poles.....................................................................................................................................................25

9. SAFETY PRECAUTIONS..........................................................................................................................................26

10. SPLICING, TERMINATION AND TESTING......................................................................................................28

11. FINAL ACCEPTANCE..............................................................................................................................................30

12. ANNEXURE 1: SAMPLE OF "AS BUILT" DRAWINGS..................................................................................32

13. ANNEXURE 2: SAMPLE OF "EQUIPMENT" ...................................................................................................33

A. Blocks……………………….…………………………………………………………………………..32

B. Pulling Grips and Devices………………………………………………………………………..34

C. Blocks, Chutes and Brackets……………………………………………………………………35

D. Lashers, Pullers, Positioners and Guides………………………………………………….36

E. Lifting tools and Brakes………………………………………………………………………….38

F. Fibre Preparation and Splicing…………………………………………………..…………..39

14. ANNEXURRE 3: Drawings And Photos………………………………………………….…………………….……40






PART B: Optical fibre accessories used in the PRASA environment.

Document Abbreviations Acronyms and Defintions........................................................................47

1. Scope ...............................................................................................................................................................48

2. Introduction …..............................................................................................................................................48

3. Optical fibres.................................................................................................................................................49

4. Ruggedizing………........................................................................................................................................49

5. Outer sheaths ..............................................................................................................................................49 6. Pigtails and patch - lead identification .............................................................................................49 7. Dust caps .......................................................................................................................................................50 8. Mid - coupler (bulkhead) ........................................................................................................................50 9. Connectors.....................................................................................................................................................51

10.Optical distribution frames and racks .............................................................................................52 10.1 ODF's must be available in three different types ......................................................52 10.2 Wall Mount Unit ......................................................................................................................52 10.3 19 inch stackable ODF sub rack ......................................................................................53 10.4 Specialized main ODF Rack or Cabinet..........................................................................53 11. Splice protectors.......................................................................................................................................54 11 1 Heat Crimping Type................................................................................................................54 11.2 Mechanical Crimping Type..................................................................................................54 12. Joint closure with splice organizer……………………………………………...……………….…….54

13. Training........................................................................................................................................................55

14. Manufacturing ………..............................................................................................................................55 15. Extent of testing .......................................................................................................................................56

16. Inspection ……............................................................................................................................................56

17. Samples.........................................................................................................................................................56 18. Packaging.....................................................................................................................................................56 APPENDIX A: Optical performance of connectors …........................................................................57

APPENDIX B: Testing of assemblies .......................................................................................................58 APPENDIX C: mechanical performance of ruggedized assemblies…........................................62

(Un-ruggedized pigtails are excluded from these tests)






PART C: Trenching of Optic Fibre Cable

1. INTRODUCTION ………………………………………………………………………………………………..65

2. SCOPE ………………………………………………………………………………………………………………....65

3. TECHNICAL REQUIREMENTS …………………………………………………….………………………...65

3.1 Trenching and Laying of Cables ………………………………………………….........………………...65

3.1.1 Trenching dimensions………………………………………………………..………………...………….65

3.1.2 Bedding and Padding ……………………………………………………...……………………………….65

3.1.3 Back-fill …………………………………………………………………………...……………………………..66

3.1 4 Reinstatement ………………………………………………………………….……………………………..66

3.1.5 Route Layout ……………………………………………………………..…………………………………66

3.1.6 T-Off points from main route ………………………………………………………….………………..66

4. MANHOLE SPECIFICATIONS …………………………………………………………..……………………67

4.1 Dimensions …………………………………………………………………….…………………………67

4.2 Drawings ………………………………………………………………………………………………………….68

4.3 Construction ……………………………………………………………………...………………………………70

4.3.1 Material …………………………………………………………………………………………………………70

4.3.2 Concrete ………………………………………………………………………...……………………………….70

4.3.3 Waterproof material ………………………………………………………….……………………………70

4.3.4 Mixing method and ratio ………………………………………………………………………………..70

4.3.5 Top Surface / Finish ….…………………………………………………………………………………….71

4.3.6 Retainer Walls ………………………………………………………………………………………………..71

4.4 Frames and Covers ……………………………………………………………………………..…………...71

4.5 Frame and Cover Support …………………………………………………………………………………..74

4.6 Slack Management ……………………………………………………………………………..………………74






I ABBREVIATIONS, ACRONYMS AND DEFINITIONS

ABBREVIATIONS

AND ACRONYMS

DESCRIPTION

AC Alternating Current

"As-Build" Draw-

ings

Final drawings of a site and/or route installation of trans-

mission infrastructure as presented to the customer at

handover.

BS British Standard

DC Direct Current

GPS Global Positioning Satellite (a system whereby the latitude

and longitude co-ordinates of any site on earth can be de-

termined via a GPS receiver)

HDPE High Density Polyethylene

Kv Kilo-volt

Nm Newton Meters

OFC Optical Fibre Cable

OHTE Overhead Traction Equipment

OTDR Optical Time Domain Reflecto meter

QAD Quality Assurance Department

SOP Standard Operating Procedure

PRASA Passenger Rail Agency of South Africa

UV Ultra Violet

GIS Geographical Information System






II RELEVANT DOCUMENTATION APPLICABLE

SPC-00029: Trenching, Laying and Hauling in of Communication Cables

SPC-00033: Optical Fibre Testing Equipment

SPC-00575: Planning and Erection of Self Supporting Optical Fibre Cable on Traction Masts

SPC-00583: Optical Fibre Accessories

SPC-00587: Horizontal Directional Drilling

SPC-00588: Optical Fibre Cable Ducts

SPC-00589: Civil Engineering Works associated with Underground Telecom Plant

SPC-00590: Working to Way leaves, Site Establishment, Safety and Local Authority Re-

quirements

SPC-01242: Wooden Poles for OFC Installations

SPC-01279: Erection of Wooden Pole Routes

PRC-00106: Post installation Test for Optical Fibre Cables

PRC-00107: Pre-testing of Optical Fibre Cables on Drums

PRC-00112: Written Safe Working Procedures for Erection of ADSS OFC on AC OHTE

E7/1: Works on, over, under or adjacent to railway lines and near high voltage equipment.

E.4E: Compliance with the Occupational Health and Safety Act (Act 85 of 1993)

SOP-0H00: Safe Work Procedure for working in confined spaces

BBF1026: Generic Equipment Cabinet






I1 RELEVANT DRAWINGS AND PHOTOS

DRAWING NO. DESCRIPTION

Drawing1 PLP Dead End

Photo 5 Method of Application of Dead End

Drawing 2 PLP Fibre Optic Targent Support

Photo 4 Method of Application of PLP Fibre Optic Targent Sup-

port

Drawing 3 Suspension fitting for double boom masts or steel bridges.

Drawing 4 Method of bringing cable down mast and insulating mast

from ground.


from ground.


from ground.

Photo1 Approved stringing pulley for fibre optic installation

Photo 2 Cable Suspension Bracket

Photo 3 Termination Bracket






1. SCOPE AND PURPOSE

The Scope of work

1.1 Introduction

1.1.1 PRASA requires the installation and commissioning of 96 fibres OFC in various rail-

way corridors. Details of spurs and terminations, specific to each section, will be provided

1.1.2 Emphasis is placed on safety and safe working procedures and Respondents shall ad-

here to all instructions and procedures issued with this tender enquiry, especially the Written

Safe Working Procedure PRC-00112 and all its associated documents as well as provisional

SOP 0H00 for working in confined spaces. If Respondents intend climbing masts, strict ad-

herence to minimum safe clearances must be maintained.

1.1.3 The new 96 fibre OFC must be installed in parallel with an existing working fibre cable,

carrying high bandwidth services, and no interference with this cable will be allowed. The

intention is to install the new cable above the existing cable. The underground cable need to

be installed in the opposite side of the railway. Spare cables are required as indicated in the

BOM.

1.1.4 The work must be planned to ensure minimal interruption to normal train services. Un-

derground track crossings must be executed by means of the “directional drilling” method

specified.

1.1.5 Respondents must note that many of the underground track crossing works may have to

be conducted at off peak hours to reduce disruptions to train services. They must allow for

significant overtime and weekend working.

1.1.6 Maximum benefit must be gained from normal electrical and track occupations request-

ed by other departments. It is therefore imperative that the PRASA regional personnel attend

the regular “occupation” meetings arranged by Train Operations.

1.1.7 Respondents must take specific note of the safety aspects as depicted in Written Safe

Work Procedure PRC-00112 as well as the safety arrangements and instructions attached

thereto and procedural compliance with the Occupational Health and Safety Act; Act 85 of

1993 and regulations. A full Statement of Compliance must be submitted for WSWP PRC-

00112, and this compliance document must be included in the Respondent’s Site Safety File.






1.1.8 An Occupational Health and Safety Plan and Risk Assessment must be outlined in the

tender document and submitted to the Project Manager by the successful Respondent before

work commences. The Risk Assessment and Safety Plan must also be placed on the Re-

spondent’s Site Safety File.

1.1.9 Safety induction by PRASA electrical officers is required before commencement of

work. Minimum safety clearances from live electrical conductors and Safety Instructions and

Guidelines will be taught and must be observed and exercised at all times.

1.1.10 Sufficient Certificated employees to work on OHTE structures must be in the Re-

spondents employment during construction works. Employee must have “C” certificates, lev-

el 2 first aid, ladder working.

1.1.11 The Respondent must be equipped with all the required plant, tools, safety equipment

and PPE (Personal Protective Equipment) to effectively and safely carry out the Works.

1.1.12 Where electrical and track occupations are required, these must be arranged by the Re-

spondent with the PRASA Supervisor and Electrical Officer.

1.1.13 Respondents must note that PRASA will utilize one PRASA (Telecoms) supervisor /

Project manager/inspector at any time during the contract period to inspect the progress and

quality of the Respondent's work. This person is not available on a full time basis (on site)

and will make scheduled and random site visits.

1.1.14 The successful Respondent must appoint a Site Supervisor for the duration of the con-

tract. The Site Supervisor must be “in charge” on site for the full duration of the contract.

1.1.15 The Respondent's site supervisor must be issued with a site diary and PRASA will

provide a site instruction book. These books must be kept updated at all times and copies

handed over to the PRASA Project Manager at progress meetings.

1.1.16 Respondents must take note that PRASA Perway or OHTE Departments must approve

and supervise all underground and overhead (boom or other) rail (track) crossings.

1.1.17 This specification covers the trenching of optic fibre cable and erection of self-

supporting optical fibre cable on 3 kV DC, 25 kV and 50 kV AC overhead high

tension electrification (OHTE) masts for PRASA.

1.1.17.1 Construction will mostly take place under live traction power conditions

and with the normal operation of train services.

1.1.17.2 Specific attention shall be paid to section 12 of this specification, which






covers safety precautions during construction.

1.1.18 The objective is to install the major component of the cable Underground. Overhead

sections should be kept to a minimum. Pipe and chamber systems may be con-

structed or utilized where these exist.

1..1.19 The same optical fibre cable must be utilized for aerial and buried sections.

1.1.20 A clause-by-clause statement of compliance to this specification is required. This

should be done by the contractor on the route surveillance and all points of non-

compliance must be detailed and discussed with the PRASA Project Manager and

singed off before any deviations will be allowed.

1.1.21 Should a tenderer method of construction and cable erection differ from this specifica-

tion, full details thereof must be provided for possible prior approval by the PRA-

SA Project Manager.

Corridor KZN CORRIDORS SUPPLY & INSTALL NEW 96 SM FIBRE OPTIC

NO. STA-TIONS

OVERHEAD FIBRE

UNDERGROUND FIBRE TOTAL

SOUTH COAST

REUNION TO PORT SHEPTON 34

110 110 KM

CLAIRWOOD TO CARTO RIDGE 18

80 80 KM

NORTH COAST

DUFF ROAD TO STANGER 18

70 70 KM

MERBANK TO CROSSMORE 6

15 KM 15 KM

_______________ __________________ _____________________ ______________

TOTALS 76

185 KM 275 KM

Corridor

CAPE TOWN CORRIDORS SUPPLY & INSTALL NEW 96 SM FI-BRE OPTIC

NO. STA-TIONS

OVERHEAD FIBRE







CAPE TOWN TO DIEPRIVIER 16 20 km

20 km

DIEPRIVIER TO MUZERBURG 6

BLOWING FIBRE ONLY 16 KM

MUZERBURG TO SIMONS TOWN 6 8 KM

8 KM

PHILP TO KAPTEINSKLIP 4

BLOWING FIBRE 7 KM

PHILIP TO CHRIS HANI 7

BLOWING FIBRE 15 KM

CAPE TOWN - BELLVILLE- MULDERVLEI 18

48km 48KM

BELLVILLE TO EERSTERIVIER 4

17 KM 17 KM

EERSTERIVIER TO STRAND 5

21KM 21KM

EERSTERIVIER T0 Muldersvlei 5 ________________ 30KM ___________

TOTALS 61 28 KM 116KM 182

Corridor

GAUTENG NORTH & SOUTH CORRIDORS SUPPLY & INSTALL NEW 96 SM FIBRE OPTIC

NO. STA-TIONS

OVERHEAD FIBRE


Randfo via PARK STATION TO GERMISTON 12 29 KM 30 KM 59 KM

MITCHELL STREET TO SAUSVILLE 12

12km 12 KM

NEW CANADA TO VEREENI-GING 20

60 KM 60 KM

DEWILT TO WINTERSNEST 8 `` 20KM 20 KM

RISSIK TO KOODERSPOORT 3 6 KM

6 KM

NEW CANADA via Nasrec TO GERMISTON 11

25 KM 25 KM

DUNSWART TO SPRING 10

20 KM 20 KM

KAALFONTEIN TO LERALLA 4

10 KM 10 KM

GERMISTON TO KWESINE 7

25 KM 25 KM






______________ _________________ _____________________ ___________

TOTALS 87 35KM 202KM 237 KM

The above distances are track distances. The actual cable lengths of sections and spares will

be detailed.

1.2.1 The successful Contractor(s) are required to survey the railway section(s) awarded to

them and produce a revised Bill of Quantities, with reasons for deviation from the original.

1.2.2 The Contractor will test the fibres in the delivered cable drums and send these results to

PRASA Project manager, alerting him if any traces differ from the supplier’s records.

1.2.3 The Contractor must install the OFC according to PRASA specifications and Written

Safe Working Procedures.

1.2.4 The Contractor must test all the fibres of the OFC from ODF to ODF and submit the

fibre traces to PRASA Project Manager/Telecom department.

1.3 The Technical Requirements

1.3.1 The installation works and materials offered must comply with the following specifica-

tions. Any deviations from these specifications must be clearly stated in a clause by clause

statement of compliance to each specification. Failure to do so will result in automatic dis-

qualification.

SPC-00029: Trenching, Laying and Hauling in of Communication Cables

SPC-00033: Optical Fibre Testing Equipment

SPC-00575: Planning and Erection of Self Supporting Optical Fibre Cable on Trac-

tion Masts

SPC-00583: Optical Fibre Accessories

1.3.2 The installation works and materials offered must also comply with the following speci-

fications. Any deviations from these specifications must be stated in a separate document.

SPC-00587: Horizontal Directional Drilling

SPC-00588: Optical Fibre Cable Ducts

SPC-00589: Civil Engineering Works associated with Underground Telecom Plant






SPC-00590: Working to Way leaves, Site Establishment, Safety and Local Authority

Requirements

SPC-01242: Wooden Poles for OFC Installations

SPC-01279: Erection of Wooden Pole Routes

PRC-00106: Post installation Test for Optical Fibre Cables

PRC-00107: Pre-testing of Optical Fibre Cables on Drums

PRC-00112: Written Safe Working Procedures for Erection of ADSS OFC on AC

OHTE

E7/1: Works on, over, under or adjacent to railway lines and near high voltage equip-

ment.

E.4E: Compliance with the Occupational Health and Safety Act (Act 85 of 1993)

2. SPECIFICATIONS AND DRAWINGS

2.1 This specification sets the standards for the materials and techniques to be used in under-

ground optical fibre cable installation and aerial optical fibre cable installations,

and may not be deviated from without the permission of the PRASA Project Man-

ager at all times.

2.2 Where reference is made to approved materials or techniques, this approval must be ob-

tained from the PRASA Project Manager, who must co-ordinate any necessary in-

terfacing with the relevant authorities.

2.3 This specification shall be read in conjunction with the Main Specification describing the

project requirements. Should discrepancies arise between the Main Specification

and this specification the requirements of the Main Specification shall prevail?

2.4 The following documentation should be read in conjunction with this specification :

2.4.1 Specification for works on, over, under or adjacent to railway lines and near

high voltage equipment. (SPK7/1)

2.4.2 E.4E: Safety arrangements and procedural compliance with the occupational

health and safety Act; Act 85 of 1983 and regulations.

2.4.3 Guideline for approval of OFC Suspensions on OHTE Masts.

2.4.4 SPK7: Protection of construction workers on or near railway lines.






3. DESIGN AND APPROVAL

3.1 Installation shall consist of a bracket clamped to the traction mast supporting a

cable suspension fitting and the cable. No drilling or welding will be allowed

on traction masts for the fixture of support brackets of any kind.

3.2 The design of the suspension hook shall be such as to prevent the cable touch-

ing or chafing against the suspension bracket or other infrastructure under the

various load conditions that the OFC will be subjected to.

3.3 All fittings and brackets installed must be galvanized in accordance with SABS

specification 763 or manufactured from approved corrosion resistant materi-

als. Where the installation is within 30 kilometers from the coast, fittings

and brackets must be stainless steel 304 as per BS (British standard)

1449/2. Tenderers must comment on the likelihood of galvanic corrosion be-

tween the stainless steel bracket and the galvanized mast and propose

measures to avoid this possibility.

3.4 An approved range of fittings and brackets, strain grips; suspenders etc. must

be used (Approval by PRASA Project Manager).Should alternative brackets

and fittings be offered then the tenderer must submit a drawing and sample of

each type of bracket and fitting for approval. Design specifications of the

brackets and fittings are required.

3.5 The design of each bracket and fitting must be sufficient to support one span of

cable load under installation and worst load conditions.

3.6 Tenderers must note that PRASA reserves the right to free issue all or part of

the necessary fittings and brackets as well as other materials including cable

should this option be exercised.

3.7 At termination points (dead ends) the cable tension shall be aligned with the

mast to avoid bending moments that cantilever fittings would cause. The ten-

sion on any mast, in any direction and under maximum load condition, must

not exceed 2000 Newton’s.

3.8 On an A frame structure, only one suspension arm must be fitted on one leg of

the A frame.

3.9 Installation of the optical fibre cable must comply with the Guideline for Ap-

proval of OFC Suspensions on OHTE Masts (as per Spoornet's letter reference

S.PL&T/I/CAO/13/3/1/6). The location of the OFC cable must not obstruct

access to the OHTE conductors for maintenance purposes at any point.

3.10 NOTE: Where this specification refers to HDPE conduit it must comply with






SABS specification 533 Part 2/1982.

3.11 Where a signal gantry structure is utilized to cross the tracks, the optical fibre

cable must be installed in 50 mm diameter HDPE conduit or galvanized

trunking secured to the channeling of the handrail. The HDPE conduit or

trunking must be properly secured to prevent sagging.

3.12 Where a boom structure is utilized to cross the tracks, the optical fibre cable

must be installed in 50 mm diameter HDPE or galvanized trunking secured in

the web of the boom. or in the channel of the I beam so that overhead person-

nel can walk on top of the beam

The HDPE conduit or trunking must be properly secured to prevent sagging.

When galvanized trunking is used, an electrical occupation must be arranged with

the relevant operational department to cross tracks.

3.13 Alternative methods or material such as fibre glass, PVC or poly carbon may

be used to cross the tracks where a boom structure is utilized, but will re-

quire prior approval from the PRASA Project Manager.

3.14 No suspension must be made on masts carrying track switches, transmission

line switches, make-off arrangements (except on A-frame structures) and

transformers. The installer will use alternative structures. Optical fibre ca-

ble deviating onto such alternative structures must clear this equipment by 2

meters in the horizontal. This alternative structure must either be a galva-

nized pole, treated wooden pole or a concrete telephone pole of the right

height and thickness to support the cable approved by the PRASA Project

Manager.

3.15. The height of the cable must be so that it will not interfere with the

normal day to day activities of the maintenance personnel and their vehicles

and ladders. This height to the bottom of the cable should be in excess of 5

meters minimum.

3.16 Where existing optical fibre is suspended on traction infrastructure, new in-

stallations must be positioned as close as possible to the existing cable, in

order to minimize possible obstruction, or be installed on the opposite side

of the rails in compliance with the revised requirements which will be ap-

proved by Prasa rail and the PRASA Project Manager.

3.17 The design must be such that at any point the bending radius of the cable must

not be less than 20 times the outside diameter of the cable.

3.18 At anchor and intermediate positions, there shall be no slippage of the cable

under any condition.






3.19 No fitting or clamp shall exert a crushing force on the cable of more than 1

000 N.

3.20 The cable shall be tensioned so that under normal conditions, i.e. when no

wind is blowing, a cable temperature of 25 °C, the maximum sag per 70 me-

ter span length must be 500 mm. Under the worst conditions, i.e. when the

wind is blowing cross-sectional at a speed of 100 km/hour, at a cable tem-

perature of 65°C, the maximum sideways deviation (sag) shall not exceed 2

meters.

3.21 The cable parameters will be provided in the Main Specification as supplied

by the cable manufacturer.

3.22 To avoid Point Loads being applied to the cable, the following guidelines in

this regard shall apply :

3.22.1 0 — 15° deviation from the straight run - standard suspension method, pre-

formed fibre optic suspension type unit or other approved fitting.

3.22.2 15° and greater deviation from straight run - false termination or similar

method.

3.23 Excessive lengths of non-terminated cable shall be avoided. On straight runs,

false terminations must be installed at intervals not exceeding 500 meters.

3.24 The position and types of brackets to be mounted on bridges and tunnels must

be clearly indicated on the bridge plans. The OFC position must be selected

to protect the cable against objects protruding from train wagons and wind

lashing. The cable may also be protected by means of an approved conduit.

The PRASA Project Manager, together with the relevant authorities, must

then approve these fittings and plans.

3.25 Clearance must be obtained from the PRASA Project Manager and other de-

partments for each bridge, tunnel and retaining wall where brackets must be

mounted. These brackets must be fixed against the wall by means of a stain-

less steel stud grouted into a hole and sealed. Rawl bolts are acceptable if the

sheath is made with an aluminum bronze finish. Chemical fixers are also ac-

ceptable. Unsuccessful holes must be closed in an approved manner.

3.26 Optic Fibre Aerial Cable Pulley or Sling :

3.26.1 A specially designed pulley or sling for the erection of optical fibre aerial

cable should be obtained for the installation and regulation of the cable.

3.26.2 The pulley/sling shall be of a suitable size to accommodate the minimum-






bending radius of the cable, of low friction and should be able to accom-

modate an installation tension in all four directions (i.e. down, up, left and

right).

3.26.3 The design of the installation pulley shall be such as to prevent touching or

chafing against any infrastructure under the various load conditions that

the pulley and OFC will be subjected to during installation.

3.26.4 After regulation it should be possible to remove the cable from the pulley or

sling and attach the cable to the suspension fitting.

3.26.5 A sufficient number of pulleys shall be available to install a cable length of

2 000 - 4 000 meters at every suspension point.

3.26.6 The PRASA Project Manager must approve the design of the pulley or

sling.

NOTE: Photo 1 indicates an approved stringing pulley for fibre optic installation.

Alternative designs will be considered, but full technical details and a

sample shall be provided for evaluation and approval.

4. SURVEY

4.1 Aerial optical fibre cable should normally be ordered in lengths of 2 000 or 4 000 meters.

Shorter lengths can be provided on request. It is however advisable not to exceed

4 000 meters due to excessive drag under installation conditions.

4.2 When a route is to be measured for the purpose of erecting an aerial optic fibre cable, a

measuring wheel should be used for accuracy. It should therefore be determined in

advance on which mast a joint/splice will be required.

4.3 Specific lengths should be determined as follows :

4.3.1 Start measuring at the termination cabinet up to the 2 000 / 4 000 meter mark.

At the 2 000 / 4 000 meter mark, a suitable mast should be selected at

which a joint could be made without any obstructions. The selected

mast must be situated in a position where it accessible for splicing. A

standard length of slack on either end must be allowed for termination

and splicing of the fibers at ground level.

4.3.2 Add at least 35meters to every length of cable to allow for splicing and add

additional for the sag of the cable per span.

4.4 False terminations must be placed at intervals of less than 500 meters.






4.5 The mast must also be identified for the construction team exactly where the first length

of cable ends and the second length starts. These masts are to be indicated on the

survey sheets. The whole route must be measured and marked in this way. Masts

where joints are to be made must not have any other traction equipment on it.

4.6 It should be noted that no additional splices, without the approval of the Project Manager

would be allowed. That means that the cable shall be fed through any obstacle that

may occur.

4.7 Care should also be taken, when measuring, to avoid short lengths of cable at the end of

the routes, thus eliminating extra splices in the cable. Transmission losses must be

reduced to a minimum.

4.8 The final route selected must avoid an excessive number of track crossings. It is im-

portant that the correct side of the track be selected beforehand. This should nor-

mally be where the service road runs, for ease of access and added fire protection.

4.9 Care must be taken at platforms, bridges and footbridges to keep the cable clear from pe-

destrians in order to avoid tampering and malicious damage to the cable.

4.10 The positioning of the optical fibre cable on 3 kV DC, 25 kV and 50 kV AC electrified

structures must be selected to avoid placing the cable in strong electric fields. Sur-

veyors must specifically adhere to the minimum clearances required.

4.11 Possible damage by grass and bush fires, e.g. on the embankments of cuttings, must be

taken into account during the survey. All potential grass and bush fire hazards

must be indicated on the survey. An alternative route must be indicated on the

survey on how to avoid these potential fire hazards.

4.12 All positions where intermediate poles are required must be indicated on the survey

drawings.

4.13 A complete set of survey sheets must be submitted before installation commences. The-

se survey sheets must indicate the start and finish of cable sections, types of brack-

ets and fittings, joints, track crossings, obstacles, etc. The cable route must be dis-

tinguished by the international symbol for optic fibre cable.

4.14 The survey sheets must be A4 pages in portrait, and each page shall cover 1 km. The

start of the cable shall be on the top of the first page, and each page will follow in

logical order. Refer to Annexure 1.

4.15 The contractor will survey the route of optical fibre cable and will provide drawings and

positions for the suspension on each mast to the Project Manager for approval by

the Regional Prasa rail Maintenance Manager at each Infrastructure Depot or local

authorities.






4.16 On completion of the work, "As Build" route drawings must be submitted, as per the

survey sheets and as stipulated in the Main Specification, which must indicate the

following :

4.16.1 Requirements as per sub clause 4.12.

4.16.2 Joint numbers and traction mast numbers.

4.16.3 Amount of cable slack at joints, underground deviations and at other inter-

mediate points.

4.16.4 All cable and drum numbers must be recorded on the survey sheets.

4.17 The co-ordinates of all joints, terminations and significant changes in direction must be

recorded via GPS. These co-ordinates must be shown on the "As Built" drawings,

and must be provided in electronic format (Auto Cad or Micro stations) in order

for it to be loaded into PRASA G.I.S Database.

5. INSTALLATION

5.1 On receipt of the cable, the following steps must be taken :

5.1.1 Ensure that the cable delivered is of the correct type and fibre count e.g. anti-

tracking cable for AC electrified sections.

5.1.2 Ensure that the cable or drums are not damaged.

5.1.3 Record drum numbers and lengths, and verify cable lengths.

5.1.4 Arrange drums according to the survey to ensure that the relative lengths are

erected in the correct order.

5.2 Ensure that all pre–testing has been completed and approved.

5.3 Preparation must be carried out on the route on which the cable is to be erected. Trees,

bushes and grass must be cut so that work can be carried out without any obstacles by the

contractor. The aerial route must be at least 3 meters clear of bush and trees within the

Prasa rail reserve. Where excessive trees or bush, which could become a fire hazard are

encountered, an alternative route must be chosen in accordance with the PRASA Project

Manager’s approval and the availability of alternative land within the Prasa rail reserve.

Tree branches overhanging the cable must be removed.

5.4 It is recommended that a 7 mm nylon ski-rope of ±2 000 meters shall be obtained to haul

the cable through the special manufactured pulleys.

5.5 The rope must be fed through the pulleys before hauling commences. Equipment such as






a mechanical fuse and swivel must be inserted between the end of the cable and the haul-

ing rope to prevent the cable from twisting during installation. A grip on or Kellems Grip

must be used to pull the fibre optic cable. The correct size grip for the particular cable

must be used. If aramid yarn is a part of the cable structure, it must be tied to the grip to

further distribute the pulling force between the hauling rope and the cable.

5.5a.The mechanical fuse must be examined after every few hauls. If the fuse has worn more

than half way it must be replaced with special copper fuse wire.

5.6 Erection of Cable on AC/DC Traction Masts :

5.6.1 Fit the universal multipurpose bracket at ±1, 5 meters above ground level.

5.6.2 Fit a pulley or sling on every suspension bracket for a distance equivalent to

the length of the cable to be hauled in.

5.6.3 Feed the hauling rope through the pulleys or slings. Two hauling ropes may

be used to expedite the hauling i.e. while the one is used for hauling, the oth-

er can be fed through the pulleys of the next section.

5.6.4 Place the drum with cable at least one span length of 70 meters away from

the mast where the cable will pass through the first pulley. This would pre-

vent the cable from bending too much while being hauled. Under no circum-

stances should the cable be bent excessively. This drum should be placed on

cable jacks with an axle. The rate of the hauling should be controlled from

this point.

5.6.5 The cable must be fed off the drum according to the speed with which the

cable is hauled. Care must be taken that the cable is not tightening between

the drum and the first pulley. A constant tension must be maintained on the

cable by braking of the cable drum when necessary. Tension must be main-

tained to avoid contact with trains. Hauling should be avoided on very windy

days.

5.6.6 The hauling team must haul the cable evenly and slowly to prevent the cable

from jerking which can result in broken fibers.

5.6.7 Good communication between persons at the drum, alongside the cable end

and the hauling team, is absolutely essential and must be available at all

times. If the communication breaks down, the hauling must be stopped

immediately until such time that communication had been re-established.

5.6.8 When hauling the cable, a person with a two-way radio must walk alongside

the cable-end to ensure that the cable is not twisting with the rope, especial-

ly at angle-masts where the possibility of twisting is great. When the cable






starts twisting, hauling must be stopped immediately. The cause of the

problem must then be pinpointed and rectified.

5.6.9 The person walking at the hauling end must ensure the best route for the ca-

ble, avoiding the cable chafing against stays or other obstacles.

5.6.10 Tensioning shall be as per sub clause 5.7.

5.6.11. Less cable slack is required for AC-type installations but sufficient slack

must be left for splicing purposes.

5.6.12. Once tensioning and splicing of the cable is completed, the suspension

bracket shall be moved up the mast in at least three steps with various

lengths of installation tools to the correct position on the mast. Note that

approved non-conductive tools must be used and installation teams must

avoid touching any high voltage carrying infrastructure at all times.

5.6.13. The splicing team must strive to keep-up with the hauling team. If this is

not the case, additional labor will be required to lower and raise the cable

for splicing purposes.

6 Tensioning

The pulling tension for the particular type of cable used is specified in kg/N.

6.1 A termination bracket and fitting (dead end) must be installed at the beginning of

each length. Where only false terminations occur in a cable section the cable

must be tensioned sequentially for every false termination section.

6. 2 The cable sag and tension under normal installation conditions may vary around

bends. Special care must be taken when the cable is removed from the pulley

and placed onto the termination fitting so that the cable does not exceed the

prescribed tension.

6. 3 The cable shall be tensioned by means of an approved device and the tension

shall be continually monitored not to exceed the parameters provided by the

cable manufacturer.

6. 4 On sections with a number of angle masts, it may be required to tension the cable

over shorter distances. In this case care should be taken not to damage the ca-

ble at the intermediate tensioning points.

6.5 Sufficient time shall be allowed for the tensioned cable to settle. This time is

when there is no longer a movement on the tensioning scale. When the correct

tension has been achieved, the suspension and termination fittings shall be fit-

ted.






6.6 The cable must be marked at all anchor points in an approved manner to indicate

possible slippage.

6.7 The site supervisor must record the final stringing tensions and terminated span

lengths on a control sheet. The site supervisor must submit these sheets with

the site diaries for scrutiny and retention.

NNEEVVEERR EEXXCCEEEEDD TTHHEE MMAAXXIIMMUUMM PPUULLLLIINNGG TTEENNSSIIOONN!!

Excessive pulling force will cause the cable to permanently elongate. Elongation may cause

the optical fibre to fail by fracturing. Good construction techniques and proper tension moni-

toring equipment are essential.

7 Cable Slack

7.1 At positions where it may be required to accumulate cable slack due to the nature

of the route, this slack must always be coiled in a figure of eight to avoid

twisting of the cable. In muddy conditions the figure of eight must be done

on a ground sheet to avoid soiling of the cable.

7.2 After the hauling process, sufficient slack must be left for splicing purposes. The

cable must reach ground level plus 15 meters plus another 15 meters on the

hauling end, which must be cut off by the installation team. The installer

must ensure that this length is cut off during the installation process.

7.3 The slack shall be coiled in two separate coils of minimum 500 mm diameter, tied

with UV stabilized cable ties at four positions and secured at the top of the

mast.

7.4 If slack boxes are specified in the main specification, these must be of sufficient

size to accommodate the cable minimum bending radius. The contractor

will supply these items according to the project specifications and the ap-

proval of the PRASA Project Manager.

7.5 Care shall be taken not to twist the cable when coiling the cable slack.

7.6 A small amount of slack, between 250 and 300 mm (sag) must be allowed at false

terminations.

7.7 In order to avoid sharp angles in the vertical plane when going over or under bridges a

gradual increase or decrease of the route shall be obtained by adjusting the suspen-

sion brackets upwards or downwards on the masts.

8. Intermediate Poles

8. 1 Intermediate poles (where required) must be installed where span lengths ex-

ceed 70 meters or where the cable veers away from the track for any






reason. Intermediate poles must be of the wooden, steel or concrete tel-

ephone type. The ground clearance of the suspended cable must not be

less than 7, 0 meters. Where the intermediate wooden pole is in the

danger of burning, a 2 meter high galvanized metal sleeve must be fitted

around the base of the pole.

8.2 The Project Manager will obtain approval for the erection of intermediate

wooden, steel or concrete poles in the vicinity of electrified tracks.

8.3 Similar cable support fittings must be utilized for the suspension of the cable

on poles as that used for the electrification masts.

8.4 The contractor will supply intermediate poles. These poles will be approved by

the PRASA Project Manager.

8.5 Stays or struts must be fitted as required or as directed by the Project Manager.

Critical poles must be concreted in position.

8.6 To make the poles more visible at night, a reflective band of UV resistant ma-

terial must be fixed to the pole next to service or other roads at a height

of 1, 5 meters above ground level.

9. SAFETY PRECAUTIONS

9.1 Due to the proximity of live wires the installer must ensure that his employees installing

the cable on the masts obtain a Category C certificate from the PRASA Project

Manager in conjunction with Esselen Park training center or any PRASA accredit-

ed institute before any work can be carried out on the masts.

9.2 The contractor's employees must be trained for competence and understanding of the

basic electrical safety requirements. The certificate obtained will not be transfera-

ble. The cost of the training will be borne by the Installer or as stipulated in the

contract document.

9.3 The installer and his employees installing the cable must be fully conversant with the

Electrical Safety Instructions and the Transnet specification E.7/1 and E.4E.

9.4 No work within 900 mm from live. DC equipment and transmission lines, and 1200 mm

from 11 kV AC live equipment. Preferably this clearance should be as great as

possible.

9.5 In all instances where the safety of workmen is jeopardized, electrical and/or track occu-

pations must be requested. The Prasa rail representative in accordance with the PRASA

Project Manager will arrange these occupations. Notification is however required

Twelve (12) weeks in advance.






9.6 Under bridges where live cross span wires are involved, at make off masts and where the

live conductors approach the optical fibre cable very closely, a standard warning board

must be fitted. Electrical personnel must be approached to arrange for a work permit to

fit the cable and warning boards.

9.7 No attempt must be made to install the cable in windy conditions, especially when the sag

(before tensioning) is blown in the direction of the track. Supervisors must use their dis-

cretion in this regard.

9.8 Tenderers must note that no metal ladders will be allowed but only wooden or fiberglass

ladders.

9.9 Tenderers must note that the AC bracket installation tool (stick) may not be used in wet or

rainy conditions.

9.10 Hard hats, protective clothing and safety belts must be worn whilst working on masts

and other structures.

9.11 Optical fibers are extremely thin and can easily penetrate skin and eyes. Any off cuts or

bare pieces of fibre must be properly disposed of. Optical fibers are categorized as

hazardous materials and require special disposal measures.

9.12 Care must be taken when testing as the laser in test equipment produces an invisible

light, which can cause permanent eye damage. All fibers should be treated as "live".

9.13 All personnel involved in the installation and testing must be made aware of the above

safety aspects.

9.14 A Health and Safety Agreement shall be entered into between PRASA and the success-

ful tenderer. The contractor will also comply with the Prasa rail regions Health and

Safety standards and will be represented on the Prasa rail regions Health and Safety

meeting.

9.15 The contractor must comply with the "Standard Safety Work Procedures for the Installa-

tion of Optical Fibre Cable" SANS 10340 (latest version). This document must also be

attached to the Health and Safety Agreement.

9.16 The Contractor must comply with the "Protection of Construction Workers on or near

Railway Lines". This document must be read in conjunction with this specifica-

tion.(SPK7/1)






10. SPLICING, TERMINATION AND TESTING

10.1 Splicing can commence after approval is obtained from the PRASA Project Manager.

10.2 All splicing and testing must be done inside a vehicle or a dust free shelter. Cleanliness

is absolutely essential to make satisfactory splices.

10.3 A competent team using an optical fibre fusion splicer in compliance with the manufac-

turer of the said device (with the stipulated software) must carry out fusion splicing and

terminations. Tenderers must state the competence and experience of the personnel en-

visaged to do the fusion splicing. Splicing must be carried out in accordance with proce-

dures and instructions as stipulated by the cable and splice housing manufacturers.

10.4 The splicing team must be suitably equipped with all the necessary materials, accesso-

ries and equipment to carry out the fusion splicing. The splice losses expected during in-

stallation must be similar to those obtained during the drum tests which should be record-

ed on a spreadsheet for reference purposes. This spreadsheet should be attached to the test

certificate when handed to the Project Manager.

10.5 Splicing must comply with the splice housing manufacturer's specifications i.e. securing

of the strength member and Kevlar, slack inside the splice closure and protection of the

individual splices.

10.6 The individual fibers must be numbered or easily identified inside the splice organizer.

The up and down ends of the cable and loose tubes must be identified.

10.7 On completion of the individual splices the organizer must be placed in approved her-

metically sealed splice housing. The contractor will supply these splice housings with

an approved manufacturer as specified in the main specification. And with the approval

of the PRASA Project Manager.

10.8 The splicer must ensure that the silica-gel packet, supplied with the dome closure, be

opened and inserted in the dome closure before closure of the dome.

10.9 The splice housing must be fixed to the mast and numbered in an approved manner with

sufficient cable slack as specified in sub clause 7.11.7.

10.10 Termination of the fibers must be carried out on approved connector’s pigtails and ter-

mination cabinets as specified in the Main Specification. The contractor will supply

these items with an approved manufacturer specified in the main specification. And

with the approval of the PRASA Project Manager.

10.11 After the complete installation each individual fibre must be tested from both fibre

ends Testing must be carried out in conjunction with Projects personnel from PRASA.

The test to be conducted shall be :






10.11.1 Fibre continuity.

10.11.2 Overall attenuation (loss) - tested by means of optical power source and

power meter.

10.11.3 Splice Loss - for each individual splice.

10.11.4 Attenuation profile - tested by means of OTDR.

10.11.5 The Project Manager reserves the right to carry out individual tests should

this be required on any length of installed fibre during any phase of the

construction. The installer shall be required to witness these tests.

10.11.6 Graphic print outs or software files must be submitted to the Project Man-

ager for his scrutiny and forwarded for approval by the Chief Signal Engi-

neer.

10.11.7a.When a splice is completed and fitted into a joint enclosure, the cable

slack (30 meters in total) must be coiled into a suitable slack box, which is

fitted to an arm on the pole or coiled around suitable brackets fitted on the

pole.

10.11.7b.When coiling the slack after the joint has been completed; it must be

coiled before the joint is secured to the pole/arm. Start coiling by rolling

the slack with the joint as the leading end (roll cable like a wheel). This

will ensure that no twists are put in the cable which will result in the fibers

being damaged.

10.11.7c.When completed place the coil into the slack box and secure the joint clo-

sure at a suitable position on the arm/pole.

11. FINAL ACCEPTANCE

11.1 Each fibre must be tested before it is introduced as directed in clause 7.11and with the

approval of the PRASA Project Manager. The purpose of these tests is to ensure that the

fibers are acceptable for use in the PRASA network.

11.2 An approved OPTICAL TIME DOMAIN REFLECTOMETER (OTDR) in compliance

with the cable manufacturer with the stipulated software must be used for the testing and

measuring of the fibers. Records of all the results must be kept for reference purposes.

11.3 Tests must be carried out at both 1310 nm and 1550 nm wavelengths. These test results

must be forwarded to The PRASA Project Manager for scrutiny and approval.






SAMPLE OF "AS BUILT" DRAWINGS






A Equipment: Blocks

Multiple Cable Block

Used for supporting multiple cables in independent rollers. Multiple cable

blocks make a cable positioner unnecessary when lashing multiple cables.

Single Roller Block

Typically used to support a single cable prior to lashing and may be used

when cables are lashed directly to strand or in over-lash applications. In

new strand situations, single roller blocks may be locked onto the strand.

In over-lash applications, this block should not be pushed in front of the

lasher.

Economy Block

Used to support a single cable prior to lashing and, depending on the ac-

tual block, may be used when cables are lashed directly to

Strand or in over-lash applications.

Pole Mount Cable Block

Used to install self-support cable and is attached to the pole hardware to sup-

port the cable as it is pulled out.

Take care that cable slack does not exceed the minimum bend radius

over blocks.






B Equipment: Pulling Grips and Devices

Kellems® Grip

This reusable grip is woven from strands of stainless steel, acts

like ‘Chinese finger cuffs’ and compresses upon being relaxed. It

provides an evenly distributed hold on the jacket of the cable.

Dynamometer

Used in monitoring the pulling tension applied to

Fibre optic cables

Breakaway Swivel

Used for preventing excessive pulling tension. It is designed to break

should it exceed a pre-set tension limit.

C Equipment > Blocks, Chutes and Brackets

90° Corner Block

Used to route cables through inside or outside corners

up to 90°. It minimizes drag on the cable in corners and

ensures that the minimum bending radius of the cable is

not exceeded. It requires specialized mounting hardware

depending on the specific use of the equipment

45° Corner Block

Used to route cables through inside or outside corner up

To 45° it minimizes drag on the cable in corners and






Ensures that the minimum bending radius of the

cable is

Not exceeded.45° corner blocks may be used as a

set-

Up chute to guide Cables from the cable trailer or

a reel stand. It requires specialized mounting hardware

depending on the specific usage of the equipment

Set-Up Chute

A set-up chute is used to guide cables from the cable trailer or reel stand.

This equipment requires specialized mounting hardware depending on the

specific use of the equipment.

Set-Up Bracket

This bracket is used to support 45° and 90° corner blocks or set-up chutes

at mid-span.

D Equipment > Lashers, Pullers, Positioner’s and Guides

Cable Positioned (or Magic Box)

This is pushed in front of a lasher by a cable block pusher to uniformly

position multiple cables that are being lashed.

Cable Guide

Used for guiding the cable into the lasher in drive-off applications. It can

be used for new strand or over-lash applications. The guide may be

pushed in front of the lasher with a cable block pusher, pulled in front of






the lasher or physically attached to the lasher, dependent on the cable guide type.

Cable Lasher

Used for lashing cable directly to installed strand or cable bundles. Lash-

ers are somewhat specific to cable and strand size – improper lasher size

or adjustment may damage cables.

Multiple Cable Pullers

This allows for multiple cables to be pulled into place when lashing

cables directly to the strand. It’s equipped with a strand brake to pre-

vent sagging of cables as the pulling tension is released. Allows pulled

cables to independently swivel.

Over-lash Cable Puller This allows multiple cables to be pulled into place in over-lash appli-

cations. Allows pulled cables to independently swivel.

Cable Block Pusher (Shotgun / Shuttle)

Used for pushing equipment ahead of a pulled lasher.






E Equipment: Lifting Tools and Brakes

Lay-Up Stick

A fibreglass stick used to lift cable blocks and cables into place utilizing

appropriate lay-up stick heads.

Cable Lifter (or Lay-up Stick Head)

This is used in conjunction with a lay-up stick to lift cables into place. The

lifter ensures that the cables being lifted are not damaged by exceeding

the minimum bending radius.

Cable Block Lifter

Used in conjunction with a lay-up stick to place assorted cable blocks

mid-span.

Wire Raising Tool

This is used in conjunction with a lay-up stick to lift cable blocks and

strand.

Strand Brake

This device is selectively placed at pole hardware locations to prevent dangerous strand sag

while strand is being installed. The strand brake allows the strand that is being pulled into

place to move in only one direction, which is the direction of the strand pull. Use of strand

brakes in conjunction with reel brakes effectively limits the amounts of strand sag between

poles during strand installation.

F Equipment > Fibre Preparation and Splicing

Buffer Tube Cutter

These are used to score drop armoured, central tube and stranded

loose tube buffers to facilitate exposing the fibbers.

Coating Stripper

This device mechanically strips fibre coating using precision blades

and preset openings in much the same way as a wire stripper takes in-

sulation off a copper wire. After the coating has been stripped, the fi-

bre is cleaned with a solution of 95% or higher isopropyl alcohol.






Fibre Cleaver (Hand Held)

Fibre cleavers score and then trim the fibre. Price and complexity of

cleavers vary widely - generally, the more you spend, the greater the

consistency of cleave. The beaver tail cleaver shown is a lower cost

model.

Fibre Cleaver (Free Standing)

This is a larger and more expensive version of a cleaver. Its main

advantage is that it performs accurate cleaves more consistently than

the hand-held models.

Fusion Splicer

Most low-loss splices are made with fusion splices, which use an electric

arc to fuse together the cleaved ends of fibbers. Splicers vary widely in

complexity, features and price. Some automate the entire splicing pro-

cess. An applicable splicer for fibre optic cables would have:

1. A fusion heat source, usually an electric arc

2. V-groove clamps for holding the fibbers

3. A way of positioning the fibbers for optimum splicing

4. A way of viewing the fibbers (microscope, display screen)

So they can be accurately positioned.

5. LID (Local Injection and Detection) and/or PAS (Profile

6. Alignment System) to aid with fibre alignment






Drawings and photos

Photo 1 Cable pulley






Photo 2

Photo 3 Termination bracket






Drawing 1

Drawing 2






Drawing 3

Drawing 4






Drawing 5

Drawing 6

End- Part A






PART B: Optical fibre accessories used in the PRASA environment

Abbreviations, Acronyms and Definitions’

Abbreviation and Acronyms Description

PVC Polyvinyl Chloride

ODF Optic Distribution Frame

LSZH Low Smoke Zero Halogen

PABX Private Automatic Branch Exchange

DEFENITION DESCRIPTION

Assembly Consist of a terminated cable in a pigtail or patch-lead configuration

Pigtail - Unrug-

gedised

Secondary coated fibre connectorised at one end (of specified length)

Pigtail - Rugged-

ised

Secondary coated fibre with aramid polymer fibers in a 1,6mm PVC sheath con-

nectorised at one end (of specified length)

Patch lead -

Ruggedised

Secondary coated fibre with aramid polymer fibers in a 1,6mm PVC sheath con-

nectorised at both ends (of specified length)

Duplex Patch

lead - Rugged-

ised

Two of secondary coated fibre with aramid polymer fibers in a figure 8 PVC sheath

with nominal thickness of 1,6mm each (of specified length)

Overall Rugged-

ised

Two of secondary coated fibre with aramid polymer fibers in a figure 8 (zip

cord)PVC sheath with nominal thickness of 1,6mm each (of specified length) with

an additional overall protective sleeve

Connector Coupling device attached to pigtail or patch – lead (of specified type)

Mid – Coupler Receptacle to fit in a cabinet to join two connectors together, also known as a mid-

dle alignment sleeve.

Flat twin cable Two simplex cables (see Duplex Patch- Lead Ruggedised) with a PVC outer pro-

tective sheath.

Strain relief boot Mechanical device that ensures that additional strain on the cable will not be trans-

ferred to the ferrule or fibre.

Organizer A unit that can accommodate fibre slack coils and splice protectors






1. SCOPE

This specification covers the supply of optical fibre accessories to supplement single

mode optical fibre cables.

2. INTRODUCTION

This specification covers the requirements for the supply of the following optical fibre

accessories and services to Prasa rail and the PRASA:

2.1 Pigtails (ruggedized and unruggedised).

2.2 Mid-Coupler (Mid alignment sleeves).

2.3 Patch cords with Connectors.

2.4 ODF's (Optical distribution sub racks)

2.5 ODF's (Optical distribution Main Frames)

2.6 Splice protectors.

2.7 Joint closures with splice organizers.

2.8 Training on installation practices.

This specification also covers the quality requirements and testing of the completed

patch-leads and pigtails as per Appendixes A, B and C.

The tenderer must indicate, clause-by-clause, in a separate statement of compliance

whether optical fibre accessories offered comply or do not comply with this specification.

If the tenderer submit ANY alternative offer, all deviations from this specification must

be clearly stated and explained. The alternative will have a test sheet and must be ap-

proved by the PRASA project manager.

The Tenderer must note that the standard connector requirement is the E-2000 APC type.

Various combinations of connectors may be a requirement in specific cases.

All units must be able to accommodate and organize cable, fibre and patch-lead slack.

Tenderers will be required to demonstrate all units offered when requested.

All ODF's must be manufactured from durable materials suitable for use in coastal areas.

All units must be completely dust proof. Tenderers are requested to specifically comment

on this requirement.






3. OPTICAL FIBRES

Only 9/125/250 pm coated optical fibers must be used to ITU G.652.D recommendations.

The fibre types used must be easily strippable and comply with customer specifications

for single mode optical fibre.

4. RUGGEDIZING

When specified, aramid-polymer fibers must be stranded longitudinally around the buff-

ered secondary coating.

The aramid-polymer fibre must be stranded with evenly thick bundles around the second-

ary sheath.

Duplex patch-leads must be offered.

All finished assemblies must be tested as specified in Appendix B of this specification.

The mechanical performance required from ruggedised assemblies is specified in Appen-

dix C.

5. OUTER SHEATH

The outer jacket material must be uniformly sheathed with PVC Type TM1 or alternative-

ly with LSZH (when specified).

The sheath must have a minimum thickness of 0; 5 mm and the overall diameter

must be 1, 6 mm +0, 2 mm.

The sheath must be yellow for single mode (SM) and orange for multi-mode (MM).

The sheath must be easily strippable from the cable.

6. PIGTAIL AND PATCH-LEAD IDENTIFICATION

A unique serial number must be printed on a permanent affixed label and attached to each

unit between 10 -20 cm from the boot of each connector. This label can also serve as

proof of testing/QA.

Labelling must be done at both ends in the case of a duplex patch-lead.

The following information must accompany each assembly:

6.1 Insertion loss @ 13 10 nm and 1550 nm (Single mode).

6.2 Return loss @ 13 10 nm and 1550 nm (Single mode).

6.3 Unique serial number.

6.4 Product description.

6.5 Order number.

6.6 Date tested.






6.7 Length of tail or patch-lead.

6.8 Type of connector.

6.9 Type of fibre (e.g. 13101 1550 nm single modes).

The rubber boot of the connector can be blue for 0" flush-polished connectors and green

for 8" angle polished connectors.

A unique identification mark (color or number) must be applied to either end of patched-

leads to assist with identification of patched-leads in densely populated ODF's or termina-

tion cabinet.

The A and B leg of Duplex Patch lead must be identified.

7. DUST CAPS

Each E-2000 (or otherwise specified) connector or mid-coupler supplied must be fitted

with an integrated dust cap to protect the end face from dust and scratches.

The E-2000 (or otherwise specified) dust cap must be spring loaded to ensure positive

closure when not mated and constructed of a material to protect users from laser radia-

tion.

Dust caps for other connectors and mid-couplers must comply with the requirements of

this specification.

Dust caps must be color coded to differentiate between single mode and multi- mode

units as well as angle and flush polished (refer to sub clause 8.3).

8. MID-COUPLER (BULKHEAD)

Single mode mid-couplers must have a ceramic alignment sleeve with a yellow insert for

identification purposes. Mid-coupler offered must have a self-secured clip that can easily

connect onto the coupling plate supplied by the optical distribution frame or rack.

The color coding must be blue for 0" flush polished and green for 8" angle polished mid-

couplers.

9. CONNECTORS

This specification generally specifies the (angle polished connector) APC E2000 con-

nectors unless otherwise specified.

Other types of connector’s angle or flush polished may be required and the minimum re-

quirement is conformance to this specification.

All connectors must consist of a ceramic ferrule and strain relief boot. Other materials

will be considered but comprehensive technical information and test results will be re-

quired.

All connectors must withstand the mechanical tests covered in this specification.






A heat-cured epoxy must be used on all connectors.

Isopropyl alcohol together with lint free tissue will be used for cleaning connectors. As-

semblies must be inert to cleaning with this fluid.

The customer reserves the right to request specialized connector materials.

The optical performance of the required connector is specified in Appendix A of this

specification.

The colour coding must be in accordance with Heading 8. MID-COUPLER (BULK-

HEAD) sentence 3

10. OPTICAL DISTRIBUTION FRAMES AND RACKS

10.1. ODF's must be available in three different types

10.1.1. A wall mount unit for small communication or PABX rooms.

10.1.2. A 19 - inch stackable ODF rack for terminating and patching fibers for small to

large communications room.

10.1.3. Specialized ODF (Main frame) for large distribution site.

10.2. Wall Mount Unit

10.2.1. The wall mount unit must have a minimum capacity for the termination of 48 Fi-

bre.

10.2.2. The unit must be easily accessible and easy to terminate and patch fibers.

10.2.3. The unit must be supplied with a removable panel to accommodate dif-

ferent types of connectors and mid-couplers.

10.2.4. The unit must be tamper proof and lockable. Two separated areas will be re-

quired:

(I) Cable entry and termination of fibers; and

(II) Distribution and patching of fibers.

10.2.5. The unit must provide cable entries for terminating and distribution to other

equipment.

10.2.6. The unit must be supplied with all cable glands, screws, nuts and bolts to secure to






a concrete or brick surface.

10.2.7. The unit must be supplied with standard accessories -splice organizers,

connector plate, cable clamps, fan-out devices and transportation

tubes.

10.3. 19 inch stackable ODF sub rack

The 19-inch stackable ODF sub-rack must have a combined splicing, termination

and storage function with a capacity for the termination, cross-connecting, store ex-

cess fibre and patching of minimum 24 fibers.

Each unit must be easily accessible and easy to terminate and patch fi-

bers.

Each unit must have a maximum height of 3U and must include a patch- lead routing

scheme.

The unit must be designed to optimize accessibility allowing minimum movement of

pigtails and fibers when the unit is opened and closed while connected systems re-

main fully operational.

The unit must be designed with a front panel for the protection of optical fibre patch-

leads.

The unit must be designed to organize excess patching cords with the option for dis-

tribution via the front or rear of the rack.

The unit must be supplied with standard accessories -splice organizers, connector

plate, cable clamp, fan-out device and transportation tubes.

10.4 Specialized main ODF Rack or Cabinet

The main ODF cabinet must have a maximum height of 47U, free standing and be

able to accommodate standard 19-inch sub-racks.

Each cabinet must be designed to facilitate various configurations based on opti-

mized modular units and to enable a variety of cabling requirements.

The cabinet must be designed to provide a complete management and storage system

for the cabling of long optical patch-leads and pigtails.






11. SPLICE PROTECTORS

11.1. Heat crimping type

A. Splice protectors must be manufactured from a durable crimping material.

B. It must have a non-corrosive material insert for strengthening purposes.

C. The length of splice protectors offered must be 60 mm.

D. All splice protectors offered must have a crimping temperature range of 210 "C

±10 "C.

11.2. Mechanical Crimping Type

Tenderers may offer mechanical splice protectors, which must comply with the re-

quirements of this specification. Comprehensive technical application and testing in-

formation must be provided to the PRASA Project Manager for approval before me-

chanical splice protectors will be used.

12. JOINT CLOSURE WITH SPLICE ORGANISER All closures must be re-enterable designed to protect splices and bare fibre from en-

vironmental and mechanical damage.

Closures must be available in various sizes and designed to accommodate splice or-

ganizers for a minimum of 48, 96, 144 and 288 splices.

All closures must be designed with a minimum of 6 cable entry ports. At least one

entry port must be oval or be able to do a "loop through" facility with minimal fibre

splices.

All cable entry ports must normally be sealed off and will only be opened when re-

quired.

The closure must be suitable to simultaneously accommodate conventional cables as

well as micro-tubes and micro cables. On the large type closures, multiple entry

ports will be preferred as well as ports that can accommodate multiple micro tubes or

micro cables.

Every component of the closure and organizer must be corrosion proof.

All closures must be UV stabilized for outdoor installation.

All closures must be water tight and suitable for direct buried applications suitable

for any environment -aerial, pedestal, and direct buried and underground applica-

tions.

All closures must be designed for numerous splice applications; expressed, tap-off,

branch and repair.






All closures must accommodate a mounting bracket for wall or aerial mounting.

The mounting type will be specified during ordering for 6, 12, and multiple fibers

per tube.

The Splice Closure Organizer must provide proper fibre management.

13. TRAINING

Training on all equipment may be required and may be ordered.

Should the Tenderer have training to offer, he/she is encouraged to do so.

Training when ordered must comply with the customer specifications.

14. MANUFACTURING

The customer reserves the right to inspect and approve the Contractors production

facility.

The preferred requirements for such a production facility are:

1. Approved termination, inspection and test equipment which will guarantee a

final product that will conform to customer specifications.

2."On site" customer audits may be conducted prior and during tenders for new

contracts.

15. EXTENT OF TESTING

Optical tests must be done on each assembly, and must comply with specification

IEC 60874, as per Appendix A and B.

Mechanical tests required for ruggedised tails or patch leads only, must be consid-

ered type approval tests as per Appendix C, and may be at the discretion of the cus-

tomer.

The tenderer must have equipment to do the tests called for in this specification.

16. INSPECTION

The customer reserves the right to call for the inspection of goods on any contract or

order, at any stage before final acceptance. When such inspection is required, the

relevant contracts and orders will be endorsed accordingly.

The Contractor must prepare, without charge to the customer, samples and speci-






mens for testing at any laborite or testing agent under supervision of the customer

17. SAMPLES

A sample of any item covered by this specification must be submitted within four-

teen (14) days if called for. The sample will be regarded as being identical with the

items for which this tenders are submitted.

The sample will be non – returnable unless specifically qualified by Tenderers.

Some items may be tested to destruction.

18. PACKAGING

Pigtails, patch-leads and components must be dispatched as per order.

Each assembly must be individually coiled with a minimum diameter of160mm.

Each item must be individually wrapped in a suitable plastic packet.

All items must be dispatched in suitable packaging to prevent damage during normal

handling. Rigid packaging is required

APPENDIX A:

OPTICAL PERFORMANCE OF CONNECTORS

OPTIMISATION The positioning of the connector key-way must be as indicated in Appendix B, test

method A.

INSERTION LOSS

The insertion loss throughout the range 1260 nm and 1558 nm must not be greater

than:

Type connector 1 Specification

Single mode 00 PC 0.3dB

Single mode 80 PC 0.3dB

The test method is shown in Appendix B test method B. Insertion loss is defined as:

Where P1 is referred optical power P2 is transmitted optical power






RETURN LOSS The return loss throughout the range 1260 nm and 1580 nm must not be greater than

or equal to:

Type connector Specification

Single mode 00 FC-PC 45dB

Single mode 80

APC 70dB

The test method is shown in Appendix B test method C.

Return loss is defined as: 101oglO (P 1 / P3) dB

Where P1 is reference optical power and P3 is reflected optical power

A4 E-2000APC Specification

Item Parameter

Strain Relief 100N

Operating Temperature -250 to 70

0 Celsius conditioned by the table

Durability Min 1000 cycles

Assembly procedure Epoxy and polished

Connection Physical contact

Lock mechanism Snap-on

Standard En186-27/cecc86 275-801/802/IEC 61 754-

15

Ferrule Materials Full ceramic zirconia

Connector Material UL 94-VO

APPENDIX B: TESTING OF ASSEMBLIES

GENERAL

All tests must be conducted between 20 "C and 25 "C.

For convenience, the optical measurements are performed on cable terminated at both

ends. On completion of the measurements, the cable may be cut to provide two optical

terminations (pigtail).

If equipment or test methods used are other than those specified below, prior permis-

sion must be obtained from Customer

Test methods must comply with specification IEC 60874.






MEASUREMENT SYSTEM

The source and power meter combination must be stable to within +0, 05 dB over a

period sufficiently long to enable to measurement to be completed. The source must

consist of a 1310 nm and 1550 nm laser (+20 nm) for Single mode and at 850 nm and

1300 nm LED for Multi-mode testing.

MASTER CORD

A master cord must be used specifically for the purpose of measuring insertion loss

and return loss. It must employ the same connector as the one to be tested and must

have a core eccentricity of less than 0, 5 pm. The error vector must be within 1130

degrees from the alignment key vector. The ferrule end face must be of the APC/PC

type. The master cord must effectively remove cladding modes within its length.

TERMINATOR

An optical terminator must be employed such that the reflected power from the end of

the fibre is reduced to a negligible value.

TEST METHODS

Optimization An example of the test configuration required is shown in figure 2

NOTE: Optimization has to occur before angle polishing because the angle has a specific

relation to the key which cannot be changed.

FIGURE 2

After the optical transmission of the connector is optimized, the key-way must be fit-

ted.






Insertion Loss using the configuration shown in Figure 3, the reference power P1

must be measured.

The connectorised cord under test must then be inserted into the system as shown in

Figure 4, and the transmitted power P2 must be measured. The insertion loss of the

mated connector id defined as Insertion loss = lOLog10 (Pl/ P2) dB

FIGURE 3 (Reference Power, PI)

FIGURE 4 (Transmitted Power P2)

Return Loss

Return loss unit

FIGURE 5 (Reference Power P 1)

Using the configuration in Figure 5, the reference power P1 must be measured.






Return loss unit

Connector under test FIGURE 6 (Reflected Power, P3)

The cord under test is then inserted into the system, and a connectorised fibre tail is connect-

ed to the cord under test as shown in Figure 6. The fibre tail must be terminated in such a

manner that the reflected power from the fibre end is negligible.

Using the configuration shown in Figure 6, the reflected power P3 must be measured.

The return loss of the two connectors under test is defined as:

Return loss = 10Log10 (P 1 / P3) -X dB

Where X = insertion loss of the directional coupler from port C to port B.

Note: This method of measuring return loss ignores the fibre loss, and also the far end con-

nector contributes to the reflected power measured.

Quality of Polish When the ferrule end face is examined with microscope at X 300 magnification, there must

be no visible cracks, scratches or other marks over the surface of the end face.

Interferometer testing Interferometer testing is required to check radius of curvature, fibre height, and apex offset,

fibre angle, and fibre and ferrule roughness. Interferometer reports must be available when

required by the customer.






APPENDIX C: MECHANICAL PERFORMANCE OF RUGGEDIZED ASSEMBLIES

(Unruggedised pigtails are excluded from these tests)

FLEXIBILITY

The fibre or any other component part of the cable must not suffer permanent damage when

the cable is repeatedly wrapped and unwrapped 4 complete turns for 10 complete cycles

around a mandrel 20 mm in diameter. The cable must be coiled with sufficient tension to

maintain continuous contact with the mandrel.

COMPRESSIVE STRESS

The fibre and component parts of the cable must not suffer damage when subjected to a com-

pressive load of 1000 N applied between two rigid and parallel plates of dimensions 50 mm

by 50 mm. The load must be applied for 60 seconds.

Tensile Test

The connector under test must be mated via a bulkhead to the optical test equipment. At a

maximum point of 300 mm from the boot, the cable must be anchored on a mandrel, without

detriment to its optical performance. The free end of the cable must be connected and routed

via a bulkhead to the optical test equipment.

A load of 100 N must be applied at a rate of 5 mm/min and held for 10 minutes. The load

must then be increased to 150 N and held for 5 minutes.

The insertion loss must be measured and recorded through the duration of the test.

The test must then be repeated for return loss measurements.

At the 100 N / 10 min stage the insertion loss must be less than 0, 6 dB and the return loss as

per Appendix A specification.

At the 150 N / 5 min stage the insertion loss must be less than 0, 7 dB and the return loss as

per Appendix A specification.

After the completion of the test the cable must be removed from the assembly and allowed to

relax for 5 minutes. Insertion loss and return loss must be measured and recorded. The inser-

tion loss must be as per Appendix a specification.






TORSION TEST

The connector under test must be mated via a bulkhead to the optical equipment. At a point

1000 mm from the rear of the boot, a force of 5 N must be applied. The weight must then be

rotated through the range 0 + 180" for a total of 10 cycles. See figure 1

The insertion loss must be continuously, recorded throughout the duration of the test. The test

must then be repeated while the return loss is measured.

During the duration of the tests, insertion loss must be less than 0, 6 dB and the return loss.

The return loss must be as per Appendix a specification. There must be no failure of the boot

bonding materials.

On completion of the test the insertion loss and return loss must be as per Appendix a

specification.

TEMPERATURE CYCLING

The optical tails under test must be connected together using bulkheads and then be connect-

ed to the test equipment.

The optical tails under test must then be subjected to ten complete cycles of four hour dura-

tion's each cycle commencing at 20 "C rising to 70 "C, falling to 15 "C and ending at 20 "C to

permit a dwell time of 1 hour at both 70°C and a transition time between temperature ex-

tremes of one hour.

For the duration of the test, the tails must be monitored for insertion loss. The insertion loss

must be equal to or less than 0, 4 dB.

The test must be repeated while the return loss is monitored. The return loss must be as per

Appendix a specification.

REPEATABILITY






Two pairs of connectors must be tested for endurance and repeatability of performance. A

pair of connectors must be mated by hand via a bulkhead and the insertion loss and return

loss be measured and recorded.

The pair must be removed from the bulkhead and mated 1000 times with the insertion loss

and return loss being measured after every 10 parting / mating cycles. The connector must be

cleaned with Isopropyl alcohol after every 10 cycles and the relevant measurements have

been completed.

The insertion loss must not increase by more than 0, 2 dB from start value or exceed 0, 4 dB

the return loss must be as per Appendix A specification.

END OF APPENDIX C

PART C: Trenching of Optic Fibre Cable

1. INTRODUCTION

This specification has been compiled for the purpose of providing guidelines, alternatives or

solutions to such situations where built manholes may be required.

2. SCOPE

This specification covers the methodology that shall be applied when constructing an under-

ground route for Telecommunication cables as well as built manholes and access termination

points (buildings)

3. TECHNICAL REQUIREMENTS

3.1 Trenching and Laying of Cables

The Trenching/pipe and chamber system must be installed on the property of PRASA be-

tween the fence line and the track formation, 3.0 meters from the center line of the nearest

track. The exact location will be decided at the site inspection and/or as shown on the at-

tached line or trench route plans.

3.1.1 Trench dimensions

a) All trenching shall be a depth of 900mm and 400mm wide

b) In difficult rock conditions i.e. shale, sandstone, late rite (ouklip), calcrete (limestone)

a trench of 500 mm is required. Sharp edges in the trench must be removed. Concrete

slabs must be laid on the padding and backfilled should the trench be at this depth.






3.1.2 Bedding and Padding

a) The trench must be laid with padding of 150 mm of approved material before cable

laying is commenced. The soft material must past thru a 12 mm riddle, before the ducting

(3 x 32 mm direct berried duct) is installed.

b) Padding can only be pleased in the trench once the Site Manager is satisfied that the 32

mm duct is installed properly. The padding material will consist of the same material as

the Bedding used before. A layer of 150 mm of Padding must be placed on the installed

ducts, and tampered by hand. No mechanical device is allowed at this stage. The force of

these types of machines can deform and damage the ducts.

3.1.3 Back-fill

a) Once the Padding is installed properly, the trench can be backfilled with the remain-

ing material that was excavated from the trench. No large rock must be used as backfill

material; the Site Manager must ensure that any material that can potentially damage the

ducts must not be allowed as backfill material.

b) A layer of 250 mm of backfill material must be installed first. A mechanical tamper

(Petrol Rammer) must be used to ensure that the compaction is done properly. Water can

be added in very dry condition; to ensure better compaction. The last layer of 250 mm of

material can now be added. Again it must be tampered as before.

3.1.4 Reinstatement

a) The compacted surface must be cleaned of any remaining material. The surface

should be raked; and all additional material must be removed from site.

3.1.5 Route layout

a) The route should be laid out in such a matter that the standard duct length (1000 me-

ters) can be used with minimal wastage. Manholes should therefore not be placed more

than 950 meters apart. At least 3 meters of duct slag should be left at the position where

the manhole will be built; only after this construction is done can it be cut to length. All

un-used ducts must over lap inside the manhole; to be jointed at a latter stage.

3.1.6 T-Off point from main route

a) Under no circumstance must this route be deviated above ground. The same trenching

methods must be adhere to up to the first line (track), only then must the crossing under

the rail comply with the stander under rail crossing specification. Only certified contrac-

tors with the necessary permission from the local Per-way office will be allowed to do

the construction under the rail.






b) All routes must enter the building underground. If not possible due to construction re-

straints (possible damage to foundation est.) can the contractor apply to secure the final

entry on the outside of the building.

c) Should this route be used as a redundant route, must the contractor ensure that the entry

point to the building of two routs be kept apart as far as possible.

4. MANHOLE SPECIFICATIONS

4.1 Dimensions

a) Manholes shall be designed and built as per site conditions.

b) Where deeper, larger or smaller (than the standard manhole) size manholes are consid-

ered, it would be preferable if one dimension (height, length, width) can be reduced one at

a time.

c) Larger manholes are used to a limited extent and shall depend on the types of services

on that particular site.

The following dimensions shall apply:

Dimension Ideal / Standard Reduced Size Manholes

Minimum Maximum*

Length (mm) – excl walls 1000 600 1000*

Width (mm) – excl walls 1000 600 1000*

Depth (mm) – excl base and

cover

800 400 800*

Wall Thickness (mm) Double brick approx. 220 mm

Base Thickness (mm) 150 145 155

Roof Thickness (mm) See Clause 4.3 frames and covers

*Maximums on all dimensions may be exceeded based on specific requirements such as:

Trench depth variations i.e. moving from a shallower trench to a deeper trench such as

sections on slopes

Nodal points require several splice closures






4.2 Drawings











4.3 Construction

4.3.1 Material

a) All manholes shall be built on site using semi-face clay bricks. Cement bricks are not

acceptable.

b) All manholes shall have double brick layers.

4.3.2 Concrete

a) Concrete strength shall be at least 25 Mpa and shall be certified.

4.3.3 Waterproof material

b) Cemflex® sealant shall be used in all cement mixes to ensure that the walls are water-

proof but vapor permeable.

4.3.4 Mixing method and ratio

a) Ensure that Cemflex® is thoroughly mixed prior to use.

b) Dilute one part by volume of Cemflex® with 10 parts by volume of clean water in a

suitable container (bucket) and mix thoroughly.

c) The best results are achieved by first mixing equal volumes of Cemflex® and water,

and then adding remainder of the water slowly whilst stirring.

d) The diluted Cemflex® is added to the appropriate dry cement/sand mixture as detailed

in the table below

Application Mix Ratio by Volume (Parts)

Cement Sand

Walls 1 3-5

Floor 1 2-3

e) If required, additional water may be added to achieve the desired consistency.

f) The mortar shall be applied with a steel trowel






4.3.5 Top surface / Finish

a) Any completed manhole shall have the top surface leveled with the adjacent ground

more especially for manholes on walkways.

b) A corrugated sheet cut out made to cover manhole shall be placed for mortar fill.

c) Wire mesh shall be placed 30 mm above the corrugated sheet in between the mortar for

the purposes of re-enforcement.

d) The wire mesh shall be cut out to the size of the coping and to the manhole lid opening.

4.3.6 Retaining walls

a) A retaining wall shall be built for manholes situated on sloping areas.

b) The retaining wall shall have double brick layer with semi-face clay bricks.

4.4 Frames and covers

a) Type 4 Manhole cover and frames shall be used with the dimensions as shown in the

pictures 1 below and the related specifications.

b) Covers and frames shall be made of conventional Cast-iron or Concrete

c) Covers and frames shall be load tested to specifications as set by the SABS. This test

shall be done by the supplier / manufacturer and a test report shall be provided.

d) Cover shall have a secure lucking system with a key system dedicated to PRASA.






e) Specifications on lid and frame.






4.5 Frame and Cover Support

a) I –beams shall be mounted as support structures for the manhole frame and cover

b) The I-beam shall be located over the manhole in such a way that it offers maximum

support and without interfering with the opening of the manhole lid and or reducing the

circumference of the manhole entry.

c) The dimensions of the I-Beam shall be 100 x 55 with a wall thickness of +/- 5mm.

d) The I-beam shall be strong enough to handle weights of about 6 tons for manholes on

driveways.

4.6 Slack Management

The built manhole shall be equipped with a slack management facility that has the follow-

ing characteristics:

a) A Cable Slack Storage device shall be mounted 90° from the Splice Closure Mount-

ing.

b) The Cable Slack Storage shall be a third of a circle. The bed shall have a radius of

180mm with a lip of 60mm.

c) The Cable Slack Storage shall be hot dipped galvanized.

Documents

ANNEXURE 4 - SPECIFICATION the PRASA …. Annexure 6...GPS Global Positioning Satellite ... Laying and Hauling in of Communication Cables SPC-00033: Optical Fibre Testing ... ANNEXURE