02 - Antenna Support Structure Specs ver 5.pdf

7/25/2019 02 - Antenna Support Structure Specs ver 5.pdf

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<TOWER COMPANY>

Modular RAN Site Specification

02

Antenna Support Structure

Specifications



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REVISION SHEET

RevisionDate:

RevisionNo:

Revised By:Change Description (Chapter, page No anddescription of the changed item)

2011-10-26 02 CME Chapters 3 / 4.1.3 / 4.5 / 4.20.1

2013-04-17 03 M. RAÑ A / CME Modification / Revision of 4.19.2 applied loads.

2013-06-04 04 M. RAÑ A / CME Modification / Revision of 4.19.1 & 4.19.2 applied loads.

2013-07-10 05 M. RAÑ A / CME Revision of 4.19.2: Applied antenna and equipment loads



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Table of Contents

1. Purpose ........................................................................................................................................... 5

2. Scope .............................................................................................................................................. 5

3.

Design Standards and Code Systems ....................................................................................... 5

4. Antenna Support Structure Design Details ............................................................................... 6

4.1 Antenna Support Structure Type ................................................................................................ 6

4.2 Applicable Codes of Practice....................................................................................................... 6

4.3 Deflections and Rotations ............................................................................................................ 7

4.4 Terrain / Exposure Category ....................................................................................................... 7

4.5 Wind Load Design ......................................................................................................................... 8

4.6 Material Specification .................................................................................................................... 9

4.7 Connection Specifications ............................................................................................................ 9

4.8 Corrosion Protection ................................................................................................................... 10

4.9 Moisture Entrapment .................................................................................................................. 10

4.10 Lightning Protection .................................................................................................................... 11

4.11 Work Platforms ............................................................................................................................ 11

4.12 Intermediate or Rest Platform ................................................................................................... 11

4.13 Cable Runway .............................................................................................................................. 12

4.14 Kick Plates .................................................................................................................................... 12

4.15 Safety Rails .................................................................................................................................. 12

4.16 Trap Doors.................................................................................................................................... 12

4.17 Climbing and Cable Ladders ..................................................................................................... 12

4.18 Antenna Support Structure Foundation Design ...................................................................... 13

4.19 Super Imposed Antenna Support Structure Loads ................................................................ 13

4.19.1 Introduction ........................................................................................................................... 13

4.19.2 Applied loads (for new sites only) ..................................................................................... 14

4.19.3 Layout of antennae, cables and aviation Light ............................................................... 16

4.20 Antenna Support Structure Manufacturing .............................................................................. 17

4.20.1 Fabrication ............................................................................................................................ 17

4.20.2 Material certification ............................................................................................................ 17

4.20.3 Non-destructive testing ....................................................................................................... 17

4.20.4 Coded welders ..................................................................................................................... 17

4.20.5

Quality management system ............................................................................................. 17

4.20.6 Markings ............................................................................................................................... 18



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4.20.7 Test assembly ...................................................................................................................... 18

4.20.8 Jigs and templates .............................................................................................................. 18

4.21 Antenna Support Structure Foundations ................................................................................. 19

4.21.1 Survey and foundation conditions..................................................................................... 19

4.21.2 Soil investigation .................................................................................................................. 19

4.21.3 Antenna Support Structure foundations ........................................................................... 19

4.21.4 Backfilling, compaction and clean up ............................................................................... 19

4.22 Antenna Support Structure Transport and Erection ............................................................... 19

4.22.1 Transport .............................................................................................................................. 19

4.22.2 Drawings ............................................................................................................................... 20

4.22.3 Corrosion treatment ............................................................................................................ 20

4.22.4 Orientation and leveling ...................................................................................................... 20

4.22.5 Straightness ......................................................................................................................... 20

4.22.6 Antenna Support Structure erection ................................................................................. 20

4.22.7 Assembly methodology ...................................................................................................... 21

4.22.8 Grouting ................................................................................................................................ 22

4.23 Antenna Support Structure Safety ............................................................................................ 22

4.23.1 Safety .................................................................................................................................... 22

4.23.2 Supervision ........................................................................................................................... 22

4.24 Antenna Support Structure Certification Antenna Support Structure Conformance

Certificate ............................................................................................................................................. 23

4.25 Antenna Support Structure Maintenance and Warranty Maintenance Procedures .......... 24

4.26 Antenna Support Structure Marking and Aviation Lights ...................................................... 24

4.26.1 Antenna Support Structure marking ................................................................................. 24

4.26.2 Aviation light types .............................................................................................................. 25



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1. Purpose

The purpose of this document is to provide basic design specifications for self-

supporting towers, monopoles and rooftop antenna mounting structures for <TowerCompany> Radio Access Network (RAN) implementation projects.

2. Scope

This Antenna Support Structure Specification is a part of the following list of CME

Specifications:

01 - General Civil Works Specifications

02 - Antenna Support Structure Specifications

03 - Rooftop Site Specifications

04 - Greenfield Site Specifications

05 - Electrical , Earthing and Lightning Protection Specifications

06 - Health and Safety Specifications

Only requirements, rules and guidelines for technical issues and design analysis are

included in the specifications.

Where operations or methods differ from or are not covered by the above CME

specifications, the specifications for those items shall be stated in the site specific

designs and documents. Additional requirements may also be specified elsewhere in

the tender documents or delivery contract.

3. Design Standards and Code Systems

Approved design standards and codes:

NSCP (National Structural Code of the Philippines 6th Edition)

NBCP (National Building Code of the Philippines)

European standard: Eurocode construction code system

American (U.S) standard code system



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4. Antenna Support Structure Design Details

4.1 Antenna Support Structure Type

The following Antenna Support Structure types shall be used:

1. Self-supporting lattice towers (tapered or parallel, four or three legged, angular orpipe construction)

2. Monopole structures

3. Rooftop poles (wall mount, mono, bi-pod or tri-pod poles, free standing or fixed tothe rooftop structures)

For loading calculations all antennas shall be assumed to be placed within 5 m from thetop of the SST.

The antenna support structure antenna mounting points shall be able to withstandbreakage at wind speeds up to 250 km/h (depending on the applicable wind zone).

The following regional wind load zones criteria shall be adopted in any calculations:

1. Zone I: 250 km/h

2. Zone II: 200 km/h

3. Zone III: 150 km/h

Specified wind speed for each zone shall be considered as Survival Wind Speed.

Operational wind speed equals 70% of survival wind speed

4.2 Applicable Codes of Practice

The antenna support structure and civil works for related structures shall comply with thefollowing list of specifications or latest amendments and revisions.

NSCP (National structural code of the Philippines, 6th

Edition, 2010)

NBCP (National building code of the Philippines)

<Tower Company> has approved the following international design standard code

systems for use in its projects.

European standard: Eurocode construction code system

American (U.S) standard code system (ANSI standards)



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Should there be any contradictory requirements between the international codes andNational Codes of the Philippines; National Codes of the Philippines will receiveprecedence.

It is essential that standards are used in a consistent manner and that standards fromdifferent sources are not used in conjunction with each other unless it can bedemonstrated that it is valid to do so.

Please note that it is the antenna support structure manufacturer responsibility to keepabreast with the industry standard and latest revisions.

4.3 Deflections and Rotations

At the top of the antenna support structure or pole structure, at operational wind speeds,the maximum rotation (twist) around the vertical axis shall be limited to 0.5° and the

maximum deflection compared to the horizontal axis shall be limited to 0.5°.

Monopole structures where above limits are not achievable the design shall be prepared

to minimize the rotation (twist) and deflection and details of the design, including

estimation of maximum rotation (twist) and deflection at operational wind speeds, shall be

submitted for <Tower Company>„s approval.

4.4 Terrain / Exposure Category

The applicable terrain or exposure category for each structure must be identified by the

contractor for each site according to the categories defined by NSCP.



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If a standard antenna support structure is being used in various locations, the controlsmust be in place to ensure that the particular site falls within the designed exposurecharacteristics for the relevant antenna support structure. Exposure category must beclearly indicated on the antenna support structure erection drawings.

4.5 Wind Load Design

The basic design wind speed to be used in the antenna support structure designs shall bechosen according to the applicable wind zones as defined by NSCP 6 th Edition, Table 207-1 Wind Zone for the Different Provinces of the Philippines.

Zone Classification(Basic Wind Speed)

Provinces

Zone 1V= 250 kph

Albay, Aurora, Cagayan, Camarines Norte, Camarines Sur,Catanduanes, Eastern Samar, Isabela, Quezon, Quirino, Samar,Sorsogon

Zone 2V = 200 kph

Abra, Agusan del Norte, Agusan del Sur, Aklan, Antique, Apayao,Bataan, Batangas, Benguet, Biliran, Bohol, Bulacan, Camiguin, Capiz,Cavite, Cebu, Compostela Valley, Davao Oriental, Guimaras, Ifugao,

Ilocos Norte, Ilocos Sur, Iloilo, Kalinga, La Union, Laguna, Leyte,Marinduque, Masbate, Misamis Oriental, Mountain Province, NationalCapital Region, Negros Occidental, Negros Oriental, Nueva Ecija,



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Nueva Vizcaya, Occidental Mindoro, Oriental Mindoro, Pampanga,Pangasinan, Rizal, Romblon, Siquijor, Southern Leyte, Surigao delNorte, Surigao del Sur, Tarlac, Zambales

Zone 3V = 150 kph

Basilan, Bukidnon, Davao del Norte, Davao del Sur, Lanao del Norte,Lanao del Sur, Maguindanao, Misamis Occidental, North Cotabato,Palawan, Sarangani, South Cotabato, Sultan Kudarat, Sulu, Tawi-

tawi, Zamboanga del Norte, Zamboanga del Sur, ZamboangaSibugay

The Vendor must state the wind speed assumed in the design for each Antenna SupportStructure type.

Care must be taken where the Antenna Support Structure is near the edge of anescarpment or on an exposed hill as this determines an effective height for purposes ofwind speed calculations according to the local standard.

4.6 Material Specification

The materials used shall comply with internationally recognized standards. American(ASTM), Japanese (JIS) and European (EN) material standards are approved for projectuse by <Tower Company>.

Material used in antenna support structure design must be indicated clearly in designcalculations and drawings.

As a minimum, following material yield strength should be used:

Main Antenna Support Structure (legs): fy = 275 MPa

Antenna Support Structure Braces (horizontal, vertical and diagonal):fy = 248 MPa

Steel Plates: fy = 248 MPa

Material yield strength adopted and applied must be uniform regardless of actual positionof members in the final Antenna Support Structure. As an example the Antenna SupportStructure can be designed for 275 MPa for all main Antenna Support Structure members,275 MPa for all braces and 248 for all plate members.

Use of lower yield (mild) steel is allowed for non-structural, non-load bearing members.

4.7 Connection Specifications

Connection bolts shall conform to ASTM A325 or JIS 8.8 or equivalent.

Anchor bolts shall conform to applicable ASTM standards or equivalent.

All structural bolts shall be M8 or bigger.

All bolts used that are smaller than M8 must be stainless steel.



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All high tensile steel bolts, M8 or bigger will be a minimum grade of 8.8. This includesbolts on climbing ladders, cable ladders and platforms.

The design of joints for lattice Antenna Support Structures must be such that bolts areable to be tightened against flat steel surfaces that bear on each other in such a way thatthe full design tension for the bolts can be achieved.

Anchor bolts (also known as cluster bolts or hold down bolts) must be hot dip galvanized.

The joint configuration shall be such that a torque wrench can be used to tighten eachbolt without clashing with adjacent bolts.

Flattened pipe-ends of any type are not to be used, as the inside of the pipe cannot begalvanized properly.

Sleeve fitting pipe member connections on Antenna Support Structure legs are notrecommended.

Use of friction grip joints in design calculations is not allowed.

Stainless steel bolts (not anchor bolts) can be used on coastal sites if the AntennaSupport Structure designer has allowed for it in his design.

All bolt joints to be fitted with flat washers at nut side of clamped materials with double nutfor each connection point to secure the connection. Deviations, if required, to be specifiedby Antenna Support Structure supplier and are subject to <Tower Company>„s approval.

Galvanized flat washers (2mm thick or thicker) or stainless steel washers in the case ofstainless steel bolts must be used on the nut end of the bolt. No spring washers are

allowed on the Antenna Support Structure. Tapered washers should be used whereappropriate, particularly on tapered flanges.

The grade, type, size, torque, and location of all bolts must be clearly indicated on theerection drawings.

Antenna mounting poles and brackets shall be bolt connections to the Antenna SupportStructure legs or antenna gantry with safety pin, plate or chain to secure the connection.

4.8 Corrosion Protection

All ferrous materials (steels) including bolts and nuts shall be hot dipped galvanized andshall conform ASTM-A123 for structural sections and ASTM-A153 for small accessories.

Bolts, nuts and washers shall be galvanized to minimum of 50 microns thickness.Excessive zinc shall be removed from the threaded parts of bolts and nuts.

4.9 Moisture Entrapment

Where pipe legs are used, drainage holes must be provided in the pipe leg that is flushwith the flange plate.



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The bottom flange of the bottom leg member must allow drainage through the grout ifthere is a hole in the flange through a 20 mm drainage holes or the bottom flange shallcontain no holes or be suitably plugged and sealed.

4.10 Lightning Protection

A 1200mm long galvanized lightning spike must be installed at the very top of the Antenna Support Structure. The spike shall be insulated from the Antenna SupportStructure. This spike can be a M16 rod or a 38 mm x 38 mm angle iron with a sharpenedpoint.

Insulated stainless steel, copper, galvanized or aluminum down conductor is to besupplied providing a secure earth path from the spike to the Antenna Support Structureearth (80 mm2 aluminum or 50 mm2 copper down conductors preferred).

The spike height shall be such that the Antenna Support Structure, lights, antennas are

all included within a 90 degree angled cone subtending from it.

An earth bar or bars, firmly and continuously fixed to the Antenna Support Structure, shallbe provided for earthing the feeder cables below all antennas (Up to 12 coax feeders forRF antennas plus required microwave units) as well as any intermediate earths asdefined in detail by <Tower Company> electrical specifications.

Similarly, an earth bar shall be provided at the base of the Antenna Support Structure forearthing all feeders prior to the bend. This lower earth bar shall be firmly connected to the Antenna Support Structure and linked to the Antenna Support Structure earthing system.

4.11 Work Platforms

A work platform shall be installed 2 to 6 m from the top of a lattice Antenna SupportStructure. Two sets of round antenna gantry shall be provided allowing 360 degreeinstallation of antenna poles. One antenna gantry is to be positioned above the workplatform and other below the platform.

Final position of platform and antenna gantry is subject to change based on equipmentinstallation and antenna requirements. Final location is subject to <Tower Company>„sapproval prior the start of Antenna Support Structure manufacturing.

Top work platform must be designed to accommodate the load of the RF units for “feeder

less” or “distributed” base station equipment solution.

A trapdoor must be fitted at the climbing ladder exit. Provision must be made for feeders topass through the floor.

4.12 Intermediate or Rest Platform

Intermediate or rest platforms shall be supplied as required by local building and/or healthand safety codes.

As minimum requirement, lattice Antenna Support Structures shall have an intermediate orrest platform fitted. This platform must be installed halfway between equipment and topwork platform (+_ 3 m) for Antenna Support Structures that exceed 30 m in height.



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The deflections of the expanded mesh floor shall be less than span/360 when carrying a150kg load at mid-span.

A trap door must be fitted at the climbing ladder exit. Provision must be made for feedersto pass through the floor.

4.13 Cable Runway

Feeder cables can be routed alongside the climbing ladder or behind the climbing ladderrungs with minimum of 200mm offset from the climbing ladder rungs.

The unused cable access hole can be fitted with a dummy cover that can be moved toeither side of the platform or else the holes must be surrounded with a 50 mm high kickplate.

The cable runway will allow for cable runs of 400 mm wide x 150 mm deep and will allowcable clamps to be attached to the offset brackets the full height of the Antenna SupportStructure at 0.5m spacing (From planned equipment mounting level to the highest pointof Antenna Support Structure).

4.14 Kick Plates

Kick plates shall be provided for all platforms as required by local occupational health andsafety standards and guidelines.

4.15 Safety Rails

Safety hand and knee rails are used and mounted according to local occupational healthand safety standards and guidelines requirements.

4.16 Trap Doors

Trapdoors shall be configured to ensure that they do not slam shut under gravity or windload.

The trapdoor shall not open forward towards the cat ladder.

The hinge of the trapdoor shall have a proper hinge pin or if a bolt is used the bolt shallhave an unthreaded shank within the hinge and shall have a lock-nut.

The trapdoor deflections shall be less than span/360 when carrying a 200kg load at midspan.

4.17 Climbing and Cable Ladders

A minimum of 400 mm wide climbing ladder must be extended the full length of the

Antenna Support Structure to the highest point of the Antenna Support Structure andallow access to the top aviation light.



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Climbing ladder rungs must be evenly spaced to allow comfortable climbing and shall be16 mm in diameter.

Designated side of the climbing ladder will allow for cable runs. The cable installationmust not impede climbing.Fall arrester system is preferred and Antenna Support Structure supplier is required tooffer a solution for <Tower Company>„s approval as optional feature.

Safety hoops and vertical stringers or similar safety structure is applicable for siteswithout fall arrest system and are installed on the climbing ladder starting 2.5 m from theground or platform. Horizontal safety hoops must be designed according to applicableoccupational Safety and Health Standards.

Safety hoops on the spine of mono poles are not practical therefore a <Tower Company>approved fall arrest system must be installed on all spines that are longer than 2 m.

Where the safety hoop and stringers are bolted together with smaller than M8 bolts,

stainless steel bolts must be used.

Climbing ladder offsets must meet the latest occupational health and safety actrequirements that will allow unobstructed climbing.

4.18 Antenna Support Structure Foundation Design

The foundations must be designed for a below ground foundation.

Above ground foundations must be designed for the specific site that it is entailed for,taking founding conditions into consideration.

Particular attention will need to be taken during construction of foundation. Photos willhave to be taken during the construction in order to assess quality of reinforced concreteand compare with Specifications.

The standard foundation design will include a soil bearing capacity of 75, 100 and150kPa. If these criteria are not achievable based on location and soil tests, then arevised non-standard foundation solution will be required.

Detailed specifications for concrete structures see “01 General Civil Works Specifications” .

4.19 Super Imposed Antenna Support Structure Loads

4.19.1 Introduction

There will be various different Antenna Support Structure load criteria‟s used by<Tower Company>. The Antenna Support Structure must be designed to suit theterrain and topographical category applicable to the location of the Antenna SupportStructure.

For co-located sites, the number of additional antenna shall be dependent on the

Site Nomination Form (SNF) and Transmission Link Form (TLF) for the panel andmicrowave antenna loads respectively. For new sites, the load table indicated belowshall be applied:



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4.19.2 Applied loads (for new sites only)

Site ClassificationAntenna

TypeSize (m) QUANTITY REGION

LAST MILE (Light Duty)

RF Antenna VariesFour (4) technologies =

twelve (12) panel antennaNCR

MW Antenna

0.60 two (2) from the list ofsizes (plus 2 antenna for

space diversity)1.20

1.80


twelve (12) panel antenna

NLZ / SLZMW Antenna

0.60

two (2) from the list ofsizes (plus 2 antenna for

space diversity)

1.20

1.80

2.40

3.00



VIS / MINMW Antenna

0.60

two (2) from the list ofsizes (plus 2 antenna for

space diversity)

1.20

1.80

2.40

3.00

3.60

CHAIN (Medium Duty)

RF Antenna Varies Four (4) technologies =twelve (12) panel antenna

NCRMW Antenna

0.60 three (3) from the list ofsizes (plus 4 antenna for


1.80



NLZ / SLZMW Antenna

0.60

three (3) from the list ofsizes (plus 4 antenna for

space diversity)

1.20

1.80

2.40

3.00



VIS / MIN

MW Antenna

0.60

three (3) from the list ofsizes (plus 4 antenna for

space diversity)

1.20

1.80

2.40

3.00

3.60



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Site ClassificationAntenna

TypeSize (m) QUANTITY REGION

HUB (Heavy Duty)



NCR

MW Antenna

0.60 five (5) from the list of

sizes (plus 5 antenna forspace diversity)

1.20

1.80



NLZ / SLZMW Antenna

0.60

five (5) from the list ofsizes (plus 5 antenna for

space diversity)

1.20

1.80

2.40

3.00

RF Antenna Varies Four (4) technologies =twelve (12) panel antenna

VIS / MINMW Antenna

0.60

five (5) from the list ofsizes (plus 5 antenna for

space diversity)

1.20

1.80

2.40

3.00

3.60

PRE-AGGREGATE/

ACCESS NODE (Super-Heavy

Duty)



NCRMW Antenna

0.60 seven (7) from the list ofsizes (plus 7 antenna for


1.80



NLZ / SLZMW Antenna

0.60

seven (7) from the list ofsizes (plus 7 antenna for

space diversity)

1.20

1.80

2.40

3.00



VIS / MINMW Antenna

0.60

seven (7) from the list ofsizes (plus 7 antenna for

space diversity)

1.20

1.80

2.40

3.00

3.60



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Applied antenna and equipment loads shall be as follows:

Technology Item Description Model Number Dimension (W x H x D)

mm

Weight

(kg)

Element per

site

Weight per

site (kg)

Tech_1 Panel Antenna TDJH-182018DE-65F 1360 × 160 × 80 11.0 3.0 33.0

Panel Antenna TDJ-809017/182018DE-65P 2580 × 268 × 138 28.0 3.0 84.0

RFM FXEB 492 x 133 x 560 25.0 1.0 25.0RRH FHEB 260 x 335.2 x 324 17.3 3.0 51.9

System Module - 133 x 447 x 560 20.3 1.0 20.3

Tech_2 Panel Antenna TDJ-809018DME-65P 2580×268×138 23.0 3.0 69.0

Panel Antenna TDJ-809017/182018DE-65P 2580 × 268 × 138 28.0 3.0 84.0

RFM FXCB 492 x 133 x 560 25.0 1.0 25.0

RRH FHEB 260 x 335.2 x 324 17.3 3.0 51.9

System Module - 133 x 447 x 560 21.0 1.0 21.0

Tech_3 Omni Antenna DB583E-SN 38.1 x 952.5 3.0 1.0 3.0

System & RF Module Flexi-lite 393 x 323 x 117.5 13.0 1.0 13.0

Panel Antenna LNX-6515DS-VTM 301 x 2449 x 181 22.6 3.0 67.8

RRH HT RRH 485 x 285 x 170 19.0 3.0 57.0

Baseband Unit HT BBU 86 x 442 x 310 12.0 1.0 12.0

Tech_4 Panel Antenna LNX-6515DS-VTM 2449 x 301 x 181 22.6 3.0 67.8

Panel Antenna TDJ-708014DE-65F 1550 × 298 × 146 20.0 3.0 60.0

RFH - 150 X 400 X 400 18.0 3.0 54.0

Baseband Unit - 560 X 492 X 133 25.0 1.0 25.0

Transport 0.6mØ MW Antenna MB71W-P06-VSB 600mmØ 23.5 varies varies

0.9mØ MW Antenna VHLPX3-7W 900mmØ 46.0 varies varies

1.2mØ MW Antenna HP4-65-D3A 1200mmØ 84.0 varies varies

1.8mØ MW Antenna HP6-65-D1A 1800mmØ 163.0 varies varies

ODU (1+0) Config - 8.0 varies varies

ODU (1+1) Config - 16.0 varies varies

Coupler (for 1+1) - 3.0 varies varies

Moreover, Antenna Support Structure structures shall be designed as minimum towithstand the following additional loads:

Brackets, frames required for antenna mounting 12 coax feeder cables for RF antennas (7/8” in size up to 35m Antenna Support

Structure height and 1-5/8” in size for Antenna Support Structures higher than35m)

2 coax feeder cable per MW antenna (1/2” in size)

All Antenna Support Structure accessories like cable and climbing ladders,obstruction lights, lightning protection, work and rest platforms etc.

TI Equipment loads for Antenna Support Structures where equipment is locatedand Antenna Support Structure platform (two outdoor equipment cabinets in fullconfiguration and one battery backup rack in full battery configuration) with the

combined weight of 1500kg‟s

Electrical distribution boards

Power and grounding cables

Load of maintenance personnel working on the Antenna Support Structure andequipment where applicable and as per applicable codes and standards

4.19.3 Layout of antennae, cables and aviation Light

For Antenna Support Structure design purposes, all RF and MW antenna loads are

to be applied evenly for the first 5m from the top of the Antenna Support Structuredownwards.



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The Antenna Support Structure load must be designed for a maximum cable layoutwidth of 400mm that will be presented to the wind with cables placed next to eachother and/or back to back up to the top of the Antenna Support Structure.

Aviation Lights have to be included in the design according to the requirements oflocal civil aviation authority‟s norms and regulations.

4.20 Antenna Support Structure Manufacturing

4.20.1 Fabrication

The fabrication of all Antenna Support Structures shall comply with the NSCP 6 th Edition or other approved code system.

4.20.2 Material certification

Certification of the grade of steel being supplied (mill certificates) by the steelmerchants must be held by the Antenna Support Structure supplier for the AntennaSupport Structures for the full guarantee period and must be made available to<Tower Company> inspection if required.

There must be a system in place that can trace the grade of steel being used for the Antenna Support Structures bought by <Tower Company>.

4.20.3 Non-destructive testing

The suppliers on critical production welds to verify their soundness must carry outregular non-destructive testing and corrective action must be taken where required.

The test results must be retained for inspection by <Tower Company> for the fullguarantee period.

4.20.4 Coded welders

Coded welders must be used on all welds. Welder‟s certification papers must bemade available to <Tower Company> for inspection on request.

4.20.5 Quality management system

Work procedures must be in place and adhered to for all phases of manufacturing.This would include, among other things, procedures for material purchasing, materialreceiving, material checking, material batching / marking, material handling, materialstorage, job card system, work in progress inspections by qualified persons, non – conformance procedures, final product inspection, product storage, componentidentification, record keeping, packaging, transport and loading procedures.



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4.20.6 Markings

The Antenna Support Structure members shall be clearly marked by hard stampingin a way that they can be checked against erection drawings, fabrication drawings,non-destructive testing, etc. In pipe sections where the wall thickness cannot be

confirmed after erection, the markings must allow a trace back to fabricationdrawings or indicate wall thickness.

Serial or model numbers will be allocated for all Antenna Support Structures andrecorded in the Antenna Support Structure erection drawings and site specificdocumentation folder by the main contractor.

All Antenna Support Structures must have a metal (Aluminum) identity name platefixed to it in a visible position (on the outside a mono pole door or on the cat ladderoffset at the first horizontal level) indicating the following minimum information:

Manufacturers name

Antenna Support Structure height

Site name

Actual terrain category

Designed terrain category

Antenna Support Structure model number

Applied load design. i.e. Metro, Rural or Urban loading design

The nameplate should not be bigger than 200 mm x 200 mm and should be fixedwith bolts or pop rivets.

4.20.7 Test assembly

New Antenna Support Structure designs must be subjected to trial assembly in thefabricator‟s yard prior to dispatch to site.

This trial assembly may only involve a typical portion of the Antenna SupportStructure if other checking procedures are in place to ensure a proper fit on site ofthe full Antenna Support Structure.

4.20.8 Jigs and templates

The accuracy of jigs and fixtures must be regularly checked against clearly markedmaster samples or drawings. Attempts must be made to counter the effects of heat stress and subsequentdistortion caused by welding or galvanizing.



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4.21 Antenna Support Structure Foundations

4.21.1 Survey and foundation conditions

The founding conditions must be clearly identified, recorded and suitability confirmedby the contractor with the design engineer after the site survey and detailed soilinvestigation. Groundwater level must be recorded if found during the soil test. If soilis suitable for backfilling it must be stated with all other test results in the soil testreport.

Results of these tests shall be included in the conformance certificate and be handedto <Tower Company> as part of site specific documentation package.

Terrain category must be clearly identified during site survey and shown in the detailsite designs to ensure correct Antenna Support Structure is allocated for each site.

The contractor is responsible for measuring the exact gradients, slopes and inclinesof the site relevant to the top of the Antenna Support Structure foundation and a fixedreference point thereby identifying the need for retaining walls or structural retainingwalls. The contractor will be responsible for the leveling of the site.

4.21.2 Soil investigation

Soil investigation is required to be done by the contractor for all Greenfield sites. Fordetailed soil investigation specification see “ 04 - Greenfield Site Specifications” .

4.21.3 Antenna Support Structure foundations

All civil works on the site shall conform to the latest edition of the applicable national /international code and <Tower Company> technical specifications.

4.21.4 Backfilling, compaction and clean up

If suitable, excavated soil must be used to level the complete site area. The leveledarea must be compacted as per applicable codes, standards and specifications.

All excess material must be removed from site and discarded.

4.22 Antenna Support Structure Transport and Erection

4.22.1 Transport

The Antenna Support Structure must be suitably protected from damage duringtransport.

Suitable spacing material (e.g. wooden planks or thick cardboard) must be used as

spacers to ensure that the Antenna Support Structure members do not scuff andthereby cause damage to the galvanizing.



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Unloading of the Antenna Support Structure on site must be supervised to ensurethat the correct Antenna Support Structure has arrived for that site and that themembers are not thrown off the truck but unloaded with care.

The Antenna Support Structure members must be stored on site clear from theground and checked as per the packing list that there are no missing components.

4.22.2 Drawings

A full set of Antenna Support Structure erection and foundation drawings must beprovided to <Tower Company> for each Antenna Support Structure type, foundationtype, etc.

Complete set of drawings are to be on site before work commences.

The drawings must include at least overall structure sizes, member sizes, bolt sizes,

bolt torque‟s, material specifications, antennae brackets, platforms, climbing andcable ladders, concrete mixes (by volume), loading assumptions, Antenna SupportStructure type and any other items of relevance that may be needed to identify theconditions for which the said Antenna Support Structure is intended.

4.22.3 Corrosion treatment

Damaged (chipped) galvanized areas must be touched up with cold galvanizingpaint. Damaged area must be clean from rust, dust, grease, dirt and dry before thepaint is applied.

4.22.4 Orientation and leveling

The orientation of the Antenna Support Structure must be set as per the approvedsite specific design and checked by the contractor using a compass or instructedmeans (map).

A dumpy level must be used to check levels. The use of a spirit level to control sitelevels is not acceptable.

4.22.5 Straightness

For compression members in lattice Antenna Support Structures the “bow” shall beless than L/1000. For other members the “bow” shall be less than L/500 where L isthe distance in millimeters, between points of lateral restraint and the bow is thedeviation measured from a straight line taken between these points.

4.22.6 Antenna Support Structure erection

All Antenna Support Structure erection shall conform to the latest issue of therelevant national or international code for structural steel work and must comply with

the manufacturer‟s instructions.



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All bolts including anchor bolts shall have a minimum of two full threads protrudingpast the face of the nut (or double nut) after tightening. The bolt lengths shall belimited to ensure that clearance of the bolt to adjacent bolts and flanges/ cleats issuch that applicable spanners can be properly used.

All bolts must be tightened to the bolt manufactures specification. The requiredtorque recommendation must be shown on the erection drawing.

The Antenna Support Structure shall be erected to an accuracy that ensures that theout of plumb is less than H/500 and that the displacement of the center line of eachcolumn is less than H/1000. H is the Height, in millimeters, of the Antenna SupportStructure above the base plate to the point under consideration. The out of plumb forpole type Antenna Support Structures shall be limited to H/200.

All bolts that are installed vertically (i.e. Leg flanges) must have the bolt head on topof the flange and the nut end at the bottom of the flange.

In the “no-wind” condition the Antenna Support Structure shall not have an initialtwist of more than 2° over a typical Antenna Support Structure height of 50m, wherethe twist is measured as the relative difference between the alignment of the faces ofthe Antenna Support Structure at the top and at the bottom of the Antenna SupportStructure. The maximum permissible twist at lower heights shall be proportionedaccordingly.

The maximum gap between any two flanges will be limited to b/200 where b, inmillimeters is the flange width. The maximum warp in any flange shall be limited tob/200.

In compression members (Legs) the gap between adjacent flanges shall be limited to

ensure that the load is transferred directly by bearing onto the adjacent member.

The maximum permissible tilt or warp of a flange shall be b/200 where b is the flangewidth or cleat length in millimeters.

The twist shall be measured by comparing the difference in slope between a lineparallel to the Antenna Support Structure face at the top of the Antenna SupportStructure and a line drawn parallel to the face of the Antenna Support Structure atthe bottom of the Antenna Support Structure (see picture below). The twist atintermediate levels will be limited in proportion to its height. E.g. the twist will belimited to 1°

4.22.7 Assembly methodology



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The erection method to control twist and plumb during erection must be stated in the Antenna Support Structure erection drawing on site and this method shall be usedperiodically to check the progress during erection.

The process of Antenna Support Structure erection shall follow and comply withapplicable Occupational Safety and Health Standards.

4.22.8 Grouting

The underside of all Antenna Support Structure base plates must be grouted. A non-shrink grout must be used and in the case of pipe legs a 20 mm diameter drainagehole must be left in the grout below the base plate. This drainage hole is not neededif the drainage hole is situated in the pipe wall adjacent to the bottom flange andthere is no hole in the bottom flange or the hole has been suitably plugged to ensure

that no water can collect in the hole.

Mono poles must have three 20 mm drainage holes in the grout set 120° apart andallows water drainage from the inside of the Antenna Support Structure.

The grout under the base plates must be applied up to but not above the lowersurface of the base plate in order to avoid water traps. The grout must be corkedunder the base plate to ensure that it is packed solid and then finished smoothly at90° to the base plate.

4.23 Antenna Support Structure Safety

4.23.1 Safety

It is the supplier‟s legal obligation to ensure that all products or portions of theproduct meet the requirements of the applicable Occupational Health and SafetyStandards and Regulations.

4.23.2 Supervision

<Tower Company> requires that proper suitably experienced supervision is presenton the site at all times during erection and reserves the right to request thatsupervision be replaced if they are dissatisfied with the performance and orexperience of the supervision provided.

It is the contractor‟s responsibility to ensure that all its personnel and itssubcontractor‟s personnel are competent and have necessary experience to performassigned works and comply with the local occupational health and safety standards,rules and regulations to ensure safe working methods and correct personalprotective equipment is utilized at site.

Copy of contractor‟s health and safety policy and plan is to be submitted to <Tower

Company> if requested.



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In residential areas prior arrangement shall be made, to have the local authorit y‟scordon off any access road(s) that could be affected while the Antenna SupportStructure is placed into position. This is with particular reference to mono poles.

When hoisting pole type Antenna Support Structures no person other thanauthorized riggers and workmen shall be allowed within the Antenna SupportStructure height equivalent radius of the erection site, until such time as the AntennaSupport Structure has been secured on the foundation.

Occupants of any building(s) adjacent to the construction site shall be notified of theintent to erect an antenna support structure, and where deemed necessaryrequested to evacuate the building(s) during placement of the Antenna SupportStructure.

4.24 Antenna Support Structure Certification Antenna Support Structure

Conformance Certificate

The Antenna Support Structure designer, manufacturer and contractor, or theirrepresentative, with a Professional Engineer certification must certify that each AntennaSupport Structure has been inspected to confirm that the site conditions and the AntennaSupport Structure erection is in accordance with site design and design assumptions.

The engineer can have representative under their guidance to accept and make reportsbut this will in no way take away responsibility from the Professional Engineer thatrepresents the Antenna Support Structure designer, manufacturer and/or Contractor.

The certificate is to be handed to <Tower Company> as part of site specificdocumentation package on completion of the Antenna Support Structure.

The following minimum information must be supplied on the certificate:

The Professional Engineers full name, signature and registration number.

The manufactures name and company address.

The site name and ID number.

The terrain category and false datum height for wind calculations of the site.

The Antenna Support Structure type and designed terrain category of the Antenna

Support Structure on site.

The reference to this specification and his compliance thereto.

The designed load as per this specification.

The foundation bearing pressure obtained and required as per his design.

Certification of the Antenna Support Structure including foundation structure.

Special maintenance instructions.



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4.25 Antenna Support Structure Maintenance and Warranty Maintenance Procedures

The Antenna Support Structure manufacturer is to define their recommended maintenanceprocedures for their Antenna Support Structures that must include at least:

Frequency of inspections (recommended to be 6 monthly initially and thenyearly or every other year depending on the location). Please note that if the

Antenna Support Structure is painted it is recommended that a visual inspection

is done to look for bolt movement before applying a spanner.

Checks for loose bolts

Instructions on bolt tightening procedures for specific bolt and washer types with

associated required torques.

Checks for signs of movements at connections

Checks for signs of rust on bolts and members

Checks for signs of cracks on welds

Checks on drainage hole blockages

Checks for signs of cracks on concrete foundations

Checks for signs of settlement on foundations

Checks for soil erosion in vicinity of foundations

The Antenna Support Structure manufacturer must fix any latent defect due to supply,fabrication and delivery that becomes evident after warranty period has expired.

4.26 Antenna Support Structure Marking and Aviation Lights

4.26.1 Antenna Support Structure marking

All Antenna Support Structures including stub Antenna Support Structures shall havenight aviation markings/lights as required by the Civil Aviation Authority of thePhilippines (CAAP).

Antenna Support Structures shall only have daytime aviation markings (internationalorange and white painting) when specifically required by the CAAP.

Painting application shall confirm to paint manufacturers specification and as a minimumshall be water based, lead free industrial type paint suitable for all weather conditions.Painting solution shall consist of three (3) layers. One (1) undercoat and two (2) topcoats.



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Antenna Support Structure supplier is to propose painting solution suitable for supplied Antenna Support Structures and submit the proposal for <Tower Company>„s approvalprior commencing painting works at sites.

Painting excludes all climbing ladders, platforms, Antenna mounting poles, andhandrails, as well as matching flanges or lap joints on legs. All aviation light systems and installations must comply with the CAAP requirementsand instructions. Supplied aviation light systems shall be DC powered led lights withbattery backup and alarm function capability.

No drilling shall be allowed during the installation of any marking, cabling orequipment on the Antenna Support Structure.

4.26.2 Aviation light types

Low-intensity aviation light – Characteristics

Low-intensity aviation lights on fixed objects shall be fixed red lights having

intensity sufficient to ensure conspicuity considering the intensity of the

adjacent lights and the general level of illumination against which they would

normally be viewed. In no case shall the intensity be less than 10 cd of red

light.

Medium-intensity aviation light – Characteristics

Medium-intensity aviation lights shall be flashing red lights, except that when

used in conjunction with high-intensity aviation lights they shall be flashing

white lights. The flash frequency shall be between 20 and 60 per minute. Theeffective intensity of the flash shall be not less than 1 600 cd of red light.

High-intensity aviation light – Characteristics

Recommendation - High-intensity aviation lights should be flashing white lights.

Applicable type of aviation light for each site is determined based on CAAP and/or

ICAO (International Civil Aviation Organization) rules and regulations and as

identified in CAAP approval / permit for the site.

It is the responsibility of the contractor to comply on CAAP requirements during theconstruction of the site. Temporary aviation lights shall be provided for the duration

of site construction as required by CAAP.

Documents

02 - Antenna Support Structure Specs ver 5.pdf