Doc complete-eng

R a i s e d a c c e s s f l o o r sINDUSTRIES

GAMMA industries France - 10/03/2009

Gamma,

YOUR PARTNER

• The leader in France for raised access flooring.A status obtained due to the quality of our installations.

• Prestigious references.Gamma Industries has taken part in some of the most outstanding projets in recent years.

• An experience recognized by all our customers.

• A total commitment from initial design, through installation to final use.

• At every stage, dedicated personnel.

Summary

The guarantee of quality Page 3

The response to your needs Page 4

Accessories page 5

Detailed sketches Pages 6

Technical information Pages 7, 8

The families Page 9

GammaINDUSTRIES

Grande Arche and CNIT - La Défense

Issy les Moulineaux

CBX Tower

Cité des Sciences - La Villette

1GAMMA industries France - 10/03/2009

GAMMA INDUSTRIES has been designing,manufacturing and installing raised accessfloors from their origins.

We offer :

• Total commitment from initial design,through installation to final use.

• A modern and efficient manufacturingplant.

• The expertise of our teams.

the industrial dynamics

Raisedaccess floors


Gamma, a realistic approach

The guarantee of quality

The Quality Management System of GAMMAINDUSTRIES is based on the InternationalStandard ISO 9001 (version 2000).Strict controls at every stage of the productionenable to guarantee the required level of quality.

GAMMA INDUSTRIES has a reputation forquality products and services. This level of qualityis achieved due to a strict and methodicorganisation.

Quality policy and targets of GAMMAINDUSTRIES are defined within our QualityAssurance Guide.Identification and tracability are the key wordsof our system.

GAMMA INDUSTRIES can meet the criteriasof “Haute Qualité Environnementale” (HQE)required by customers, due to :

• Selection of the raw materials used.

• Industrialization of our production processes.

• Mechanical and acoustic performances ofour products.

• Policy for reduction of our packing productsand industrial waste.

QualityManagement

System

Quality control and final control

Laboratory and testing apparatus


The families

Gamma, a wide selection

TECHNICAL APPLICATIONS

RANGE M0

SPECIAL APPLICATIONS

OFFICE APPLICATIONSOfficesRaised floors with low finished heightTrading rooms - call centers - casinosLight computers rooms

Heavy computers Technical rooms - telephone or network centersLaboratoriesHeavy loads - Important heights

Offices inside high buildingsRaised floors with low finished heightTechnical rooms with M0 requirementOffices with high acoustic performances

Scientific roomsSpecial technical roomsClean rooms


GAMMA INDUSTRIES has efficient technical andsales departments ensuring the selection of the mostsuitable raised floor to meet your requirements.

GAMMA INDUSTRIESA wide range of products suitable to meet your requirements. There is a family of panels to meet every requirement, and several panels to suit every room.

GammaINDUSTRIES

GAMMA INDUSTRIES refers to the European Standard NF EN 12825 for all its testsand controls.

The response to your needs

OFFICE APPLICATIONS

Offices

Raised floors with low finished height

Trading rooms - call centers - casinos

Light computers rooms

TECHNICAL APPLICATIONS

Heavy computers

Technical rooms - telephone or network centers

Laboratories

Heavy loads - Important heights

RANGE M0

Offices inside high buildings

Raised floors with low finished height

Technical rooms with M0 requirement

Offices with high acoustic performances

SPECIAL APPLICATIONS

Scientific rooms

Special technical rooms

Clean rooms

BU

RO

BO

X

GA

MM

APA

C

GA

MM

AB

OX

BU

RO

PAC

GA

MM

AB

OX M

0

GIM

MIN

IGA

M

BU

RO

BO

X M

0

ALU

CA

ST

GA

MM

AC

ORE

The families

4

Headquarters


CompositionThe Burobox panel is made up as follows :• A high density resin bonded core, thickness 30 or 38 mm.• A bottom tray of 0.5 mm thick galvanized steel turning

up the sides of the panel.

CoveringsThe Burobox panel is available without covering.

DimensionsStandard size : 600 mm.Special size : 675 mm, for thickness 38 mm only.

Options• Top varnished.• Top plate of 0.5 mm thick galvanized steel.• 19 mm thick core.

Fire classification

The Burobox panel is classed M1 (SNPE report n° 13149-07).

Electrical resistance It varies from 5x108 to 2x1012 ohms, depending on theproperties of the covering.

Acoustic The acoustic insulation measured between 2 adjacent rooms,separated by a densely insulated partition, varies from 46 to51 dBA, depending on the thickness of the panel and thecovering (Dn,f,w according to Standard EN ISO 140-12).

Class 1 Class 2 Class Class 4 Class Class

The Burobox panel is widely used in office buildings. It can be covered with textile tiles used with access flooring, free laid on site.

Gamma

Burobox 30

Burobox 38

Burobox

Burobox

Deflection classA (the most stringent)BC (the least stringent)

Maximum deflection2.5 mm3.0 mm4.0 mm

Load class

Ultimate load

Working load

1

>4kN

>2kN

2

>6kN

>3kN

3

>8kN

>4kN

4

>9kN

>4.5kN

5

>10kN

>5kN

6

>12kN

>6kN

INDUSTRIES

NB : A system classed 1A is a system forwhich the ultimate load is at least 4kN (load class 1). The working load of this system is at least 2 kN,with a safety factor of 2, for a deflection lessthan 2.5 mm (deflection class A).

See tables below for the other classes.

Load classes according to NF EN 12825 and using safety factor = 2.0.

Survey Institute : SOCOTEC CONSULTING.

Framework

Self-supporting

Stringers 30/15

Self-supporting

Stringers 30/15

Class

1A (or 2B or 3C)

2A (or 3B or 4C)

2A (or 4B or 5C)

4A (or 5B or 6C)

Certificate

Nr. 03.10.30.07

Nr. 03.10.30.04

Nr. 04.11.17.02

Nr. 04.11.17.01

Load classes


CompositionThe Buropac panel is made up as follows :• A high density resin bonded core, thickness 38 mm.• A bottom aluminium foil.• An ABS surround, heat bonded to the edge of the core.

DimensionsStandard size : 600 mm.

Options• Bottom plate of 0.2 mm thick aluminium.• Top varnished.

Fire classification The Buropac panel is classed M1 (SNPE report n° 13148-07).


Acoustic The acoustic insulation measured between 2 adjacent rooms,separated by a densely insulated partition, varies from 44 to50 dBA, depending on the covering (Dn,f,w according toStandard EN ISO 140-12).

NB : A system classed 1A is a system forwhich the ultimate load is at least 4 kN (load class 1). The working load of this system is at least 2 kN,with a safety factor of 2, for a deflectionless than 2.5 mm (deflection class A).

See tables below for the other classes.Survey Institute : SOCOTEC CONSULTING.


The Buropac panel has been specially designed for use in offi-ces and computer rooms.This panel is also recommended for rooms with non-magneticrequirements. It is suitable for all the coverings used with accessflooring.

Gamma

Framework

Self-supporting

Stringers 30/15

Class

1A (or 1B or 2C)

2A (or 3B or 4C)

Certificate

Nr. 03.10.30.23

Nr. 03.10.30.24

Buropac

Buropac

Buropac



Load class

Ultimate load

Working load

1

>4kN

>2kN

2

>6kN

>3kN

3

>8kN

>4kN

4

>9kN

>4.5kN

5

>10kN

>5kN

6

>12kN

>6kN

INDUSTRIES

Load classes



CompositionThe Gammabox panel is made up as follows :• A high density resin bonded core, thickness 30 or 38 mm.• A bottom tray of 0.5 mm thick galvanized steel.• A perimeter plastic edge trim slotted into the sides of the

panel.

CoveringsThe Gammabox panel is available with the followingcoverings :


Fire classification The Gammabox panel is classed M1 (SNPE report n° 13149-07).


Acoustic The acoustic insulation measured between 2 adjacentrooms, separated by a densely insulated partition, variesfrom 46 to 51 dBA, depending on the thickness of thepanel and the covering (Dn,f,w according to Standard ENISO 140-12).

NB : A system classed 1A is a system forwhich the ultimate load is at least 4kN (load class 1). The working load of this system is at least 2 kN,with a safety factor of 2, for a deflectionless than 2.5 mm (deflection class A).




Gammabox 38

The Gammabox panel has been specially designed to meetthe requirements of technical, data processing and scientificapplications.It is suitable for all the coverings used with access flooring,excepted textile and mineral coverings.

Gamma

Framework

Self-supporting

Stringers 30/15

Stringers 45/15

Self-supporting

Stringers 30/15

Class

1A (or 2B or 3C)

2A (or 3B or 4C)

5A (or 5B or 5C)

3A (or 5B or 5C)

5A (or 6B or 6C)

Certificate

Nr. 03.10.30.10

Nr. 03.10.30.01

Nr. 03.10.30.05

Nr. 04.11.17.03

Nr. 04.11.17.04

Gammabox 30

Gammabox

Gammabox



Load class

Ultimate load

Working load

1

>4kN

>2kN

2

>6kN

>3kN

3

>8kN

>4kN

4

>9kN

>4.5kN

5

>10kN

>5kN

6

>12kN

>6kN

INDUSTRIES

Load classes


• High pressure laminate• Vinyl

• Linoleum• Rubber


CompositionThe Gammacore panel is made up as follows :• A high density resin bonded core, thickness 30 mm.• A bottom plate of 0.5 mm thick galvanized steel.• A peripheral extruded aluminium section inserted into

the core and holding the edge trim.• A plastic edge trim slotted into the above mentioned

aluminium section.

Coverings The Gammacore panel is available with the followingcoverings :

DimensionsStandard size : 600 mm.Special sizes, on request.

Fire classification The Gammacore panel is classed M1 (SNPE report n° 13149-07).


Acoustic The acoustic insulation measured between 2 adjacent rooms,separated by a densely insulated partition, varies from 46 to 51dBA, depending on the covering (Dn,f,w according toStandard EN ISO 140-12).

NB : A system classed 1A is a system forwhich the ultimate load is at least 4 kN (load class1). The working load of this system is at least 2 kN,with a safety factor of 2, for a deflection lessthan 2.5 mm (deflection class A).




The Gammacore panel is famous on the world market for itsquality, design and finish.It is characterized by an extruded aluminium edging insertedinto the core.This panel has been designed to meet the requirements oftechnical, data processing and scientific applications. It is suitablefor all the coverings used with access flooring, except textileand mineral coverings.

Gamma

Framework

Self-supporting

Stringers 30/15

Class

1A (or 2B or 4C)

2A (or 3B or 5C)

Certificate

Nr. 03.10.30.12

Nr. 03.10.30.03

Gammacore

Gammacore

Gammacore



Load class

Ultimate load

Working load

1

>4kN

>2kN

2

>6kN

>3kN

3

>8kN

>4kN

4

>9kN

>4.5kN

5

>10kN

>5kN

6

>12kN

>6kN

INDUSTRIES

Load classes





CompositionThe Gammapac panel is made up as follows :• A high density resin bonded core, thickness 30 mm or

38 mm.• A bottom plate of 0.5 mm thick galvanized steel.• An ABS surround, heat bonded to the edge of the core.

CoveringsThe Gammapac panel is available with the following coverings :

DimensionsStandard size : 600 mm.Size 675 mm for thickness 38 mm.Special sizes, on request.

OptionsFor panels without covering only :• Top varnished.• Top plate of 0.5 mm thick galvanized steel.

Fire classification The Gammapac panel is classed M1 (SNPE report n° 13149-07).The Gammapac panel, 38mm thick, is classed F30, according to DIN 4102.

Electrical resistance It varies from 5x105 to 2x1012 Ohms, depending on the properties of the covering.

Acoustic The acoustic insulation measured between 2 adjacent rooms,separated by a densely insulated partition, varies from 44 to50 dBA, depending on the thickness of the panel and thecovering (Dn,f,w according to Standard EN ISO 140-12).





Gammapac panels are multipurpose panels designed tomeet a wide range of applications.They are suitable for all coverings used with access flooring.

Gamma

without covering

with HPL covering

Gammapac

Gammapac



Load class

Ultimate load

Working load

1

>4kN

>2kN

2

>6kN

>3kN

3

>8kN

>4kN

4

>9kN

>4.5kN

5

>10kN

>5kN

6

>12kN

>6kN

INDUSTRIES

Gammapac 38

Framework

Self-supporting

Stringers 30/15

Self-supporting

Stringers 30/15

Self-supporting

Stringers 30/15

Stringers 45/15

Class

1A (or 1B or 2C)

2A (or 3B or 4C)

2A (or 2B or 3C)

2A (or 3B or 4C)

2A (or 4B or 5C)

4A (or 5B or 5C)

5A (or 5B or 5C)

Certificate

Nr. 03.10.30.08

Nr. 03.10.30.05

Nr. 03.10.30.11

Nr. 03.10.30.02

Nr. 03.07.10.06

Nr. 03.07.10.08

Nr. 03.07.10.10

Gammapac 30

Gammapac 30

Load classes



• Linoleum• Textile covering• Rubber


CompositionThe Burobox M0 panel is made up as follows :

• A mineral core, 19 to 30 mm thick.If required, this core may be covered with galvanized steel.

CoveringsThe Burobox M0 panel is available without covering.

DimensionsStandard size : 600 mm.Special size : module 675 mm.

Options• Bottom tray of 0.5 mm thick galvanized steel turning

up the sides of the panel.• Top plate of 0.5 mm thick galvanized steel.

Fire classificationThe Burobox M0 panel is classed M0 (SNPE reports n° 1152-03 and 12215-05).

Electrical resistance It varies from 5x108 to 2x1012 ohms, depending onthe properties of the covering.

Acoustic The acoustic insulation measured between 2 adjacentrooms, separated by a densely insulated partition,variesfrom 49 to 54 dBA, depending on the thickness of thepanel and the covering (Dn,f,w according to StandardEN ISO 140-12).


The Burobox M0 panel is widely used in office buildings. It can be covered with textile tiles used with access flooring, free laid on site.

Gamma

Burobox M0

BuroboxM0

Burobox M0



Load class

Ultimate load

Working load

1

>4kN

>2kN

2

>6kN

>3kN

3

>8kN

>4kN

4

>9kN

>4.5kN

5

>10kN

>5kN

6

>12kN

>6kN

INDUSTRIES

NB : A system classed 1A is a system forwhich the ultimate load is at least 4kN (load class1).The working load of this system is at least 2 kN,with a safety factor of 2, for a deflectionless than 2.5 mm (deflection class A).




From 1 A à 3 A depending on thickness of the mineral andsteel plates used.

Load classes


Gammapac M0 The family Gammapac M0 panels are multipurpose panelsdesigned to meet a wide range of applications.They are widely used to suit access floors in High RiseBuildings.

CompositionThe Gammapac M0 panel is made up as follows :

A mineral core 30 mm thick. A bottom 0.5mm thick galvanized steel plate. A PVC/ABS surround heat bonded to the edge of the

mineral core.

Coverings The Gammapac M0 panel is available with the followingcoverings :

High Pressure Laminate Vinyl or Linoleum Carpet in free laid tiles

This panel may be supplied without covering.

Dimensions Standard size : 600 mm

Options For panels without covering only:

Top varnished

Fire classificationThe Gammapac M0 panel is classed M0.

Electrical RésistanceDepending on the properties of the covering, it varies from5.105 to 2.1012 ohms, measured with the covering.

Acoustic The acoustic insulation measured between 2 adjacent roomsseparated by a densely insulated partition, varies from 49 to54 dBA depending on the covering (Dn,f,w according toStandard NF EN ISO 10848-2).

Load ClassesFramework Class Certificate

Self-supporting 1A (or 1B or 1C) Nr. 08.12.0205

Stringers 30/15 2A (or 2B or 2C) Nr. 08.12.2205

GAMMAPACM0

Stringers 45/15 2A (or 2B or 2C) Nr. 08.12.3205

NB : A system classed 1A is a system for which theultimate load is at least 4 kN (load class 1).The working load of this system is at least 2kN with asafety factor equal to 2, for a deflection less than 2.5mm(Deflection Class A).See tables below for the other classes.

Load classes according to NF EN 12825 – Safety factor = 2Load Class 1 2 3 4 5 6 Deflection Class Maximum

DeflectionUltimate load > 4kN > 6kN > 8kN > 9kN > 10kN > 12kN A (the more stringent) 2.5 mmWorking load > 2kN > 3kN > 4kN > 4.5kN > 5kN > 6kN B 3.0 mm

C (the least stringent) 4.0 mm

Gammapac M0


CompositionThe Minigam panel is made up as follows :

• A mineral core 18 mm thick.• A steel tray 0,5 mm thick. • A top steel sheet 0,5 mm thick.

CoveringsThe Minigam panel is available without covering.


Fire classification Minigam panel is classed M0 (SNPE 11152-03).


Acoustic The acoustic insulation measured between 2 adjacentrooms, separated by a densely insulated partition, variesfrom 47 to 50 dBA, depending on the covering (Dn,f,waccording to Standard EN ISO 140-12).





The Minigam panel has been designed for offices where theavailable height for access floors is limited.The Minigam panel is classed M0 (incombustible), and ischaracterized by a thickness of 19mm only. It can be covered with textile tiles used with access flooring,free laid on site.

Gamma

Minigam

Minigam



Load class

Ultimate load

Working load

1

>4kN

>2kN

2

>6kN

>4kN

3

>8kN

>4kN

4

>9kN

>4.5kN

5

>10kN

>5kN

6

>12kN

>6kN

INDUSTRIES


Framework

Self-supporting

Class

1A (or 1B or 1C)

Certificate

Nr. 03.10.30.20Minigam

Load classes


CompositionThe Alucast aluminium is made up as follows :• A top distributor plate, 3 mm thick.• A double peripheral reinforced rib.• A network of central ribs.

The monolithic conception of Alucast panels enables toreach the levels of performance and accuracy requiredfor high-tech applications.

CoveringsThe Alucast panel, plain or perforated, is available withthe following finishes :• vinyl.• rubberThe Alucast grating (AF6) is available rough or epoxypainted.

Dimensions Standard size : 600 mm.

Fire classification Without covering, the Alucast panel is classed M0(incombustible), by nature.

Electrical Resistance It varies from 5x105 to 2x1012 ohms, depending on theproperties of the covering.

Range of perforations

• Alucast PF1 : Perforated panel, 7 % free area.• Alucast PF2 : Perforated panel, 11 % free area.• Alucast PF3 : Perforated panel, 15 % free area.• Alucast PF4 : Perforated panel, 22 % free area.• Alucast AF5 : Perforated panel, 40 % free area.• Alucast AF6 : Grating, 60 % free area.


Alucast is an aluminium die-cast panel of great strength.Alucast is suitable for industrial and high-tech clean roominstallations, and for rooms with non-magnetic requirements.The panel is suitable for all the soft coverings normally used foraccess flooring.

Gamma

Alucast plain panel

Alucast PF4 (22%)

Alucast

Alucast



Load class

Ultimate load

Working load

1

>4kN

>2kN

2

>6kN

>3kN

3

>8kN

>4kN

4

>9kN

>4.5kN

5

>10kN

>5kN

6

>12kN

>6kN

INDUSTRIES

NB : A system classed 6A is a system for whichthe ultimate load is at least 12 kN (load class 6).The working load of this system is at least 6kN,with a safety factor of 2, for a deflection lessthan 2.5 mm (deflection class A).

See tables below for the other classesSurvey Institute : SOCOTEC CONSULTING.

Framework

Self-supporting

Self-supporting

Class

6A (or 6B or 6C)

6A (or 6B or 6C)

Certificate

Nr. 03.10.30.13

Nr. 03.10.30.14

Load classes


Alucast PF2 : Perforated panel 11 %

Alucast PF4 : Perforated panel 22 %

Alucast AF6 : Grating 60 %


CompositionThe Gim panel is made up as follows :

• A top distributor plate of 3 mm thick steel.• A peripheral steel hollow section welded to the

distributor plate.• Central steel bars welded to the distributor plate.• A plastic edge fixed to the distributor plate.All the visible surfaces of the Gim panel are painted.

Coverings The Gim panel is available with the following coverings :

The Gim panel is also available without covering.

DimensionsStandard size : 600 mm.Special sizes, on request.

Fire classification Without covering, the Gim panel is classed M0 (incombustible),by nature.


NB : A system classed 5B is a system forwhich the ultimate load is at least 10 kN (load class 5). The working load of this system is at least 5kN,with a safety factor of 2, for a deflectionless than 3 mm (deflection class B).

See tables below for the other classes.Survey Institute : SOCOTEC CONSULTING.


The Gim Panel, made of a robust welded steel structure, isdesigned for use in heavy duty industry : offshore platforms,Navy, clean rooms, or machinery rooms.It is suitable for all the coverings used with access flooring.

Gamma

Gim

Gim



Load class

Ultimate load

Working load

1

>4kN

>2kN

2

>6kN

>3kN

3

>8kN

>4kN

4

>9kN

>4.5kN

5

>10kN

>5kN

6

>12kN

>6kN

INDUSTRIES

Framework

Self-supporting

Stringers 30/15

Class

5B

6C

Certificate

Nr. 06.10.0905

Nr. 06.10.4917

Gim


Load classes




31bis, rue des Longs Prés 92100 Boulogne -Billancourt (France)

Tel. : 33 (0)1 41 23 10 21 - Fax : 33 (0)1 41 23 10 01

www.gamma-industries.com

Pedestals

Stringers

The pedestals are made up of :

• a square baseplate of galvanized steel.• a steel galvanized column welded to the baseplate.• a die-cast aluminium or steel head, according to the type of pedestal.• a locking nut for height adjustment.

Standard pedestalThe head has a sufficient length to adjust the height + or - 20 mm.Ridges moulded on the head allow a positive location of the panels.

Pedestal for low finished heightThe threaded steel head allows an adjustment of + or - 7 mm. The panels lay directly on a conductive pad. These pedestals allow aminimum finished height of 70 mm.

Pedestal for great finished height (more than 800 mm)The column is a square hollow section of galvanized steel.The base, the head and the locking nut are the same as for thestandard pedestal.

InstallationThe pedestals are bonded to the concrete by way of a specialadhesive, or may be mechanically fixed.A device on the baseplate permits a quick and safe fixing of the copperearthing strap.

Lockable stringersThey are made of galvanized steel . They are designed for locationon pedestal heads.The stringers provide rigidity to the understructure, and stabilityagainst lateral strain.The depth of the section is adapted to the required performances :

• 30 mm deep : type 30/15.• 45 mm deep : type 45/15.

Special stringersWhen pedestals are omitted due to obstructions, i.e. electrical services,air ducting, etc., special bridging stringers may be used.Within these particular areas, its is admitted that the deflection maybe 20% more than for the rest of the raised floor.

Standard pedestal

Pedestal low height Pedestal great height

Lockable stringer

GammaINDUSTRIES

Raised access floors


Riser

Special perimeter detailMinimum free height : 50mm

Standard perimeter detailMinimum width of perimeter cuts :100mm

Special perimeter detailMaximum void width : 60mm

Detail of profile over void alongfacadeVoid greater than 60mm

Dilatation jointStandard case

Loading performancesThe load classes of the Gim-Pf panels are identical tothe classes of the panels they are mixed with.

Air flow Characteristics The total free area per panel is 8 dm2. Optional adjustable sliding dampers can be fitted foradjustment of the air flow.

The graph below shows the possible air flow accordingto the air pressure in the plenum and the air pressuredrop according to the air flow.

Gim-Pf

GammaINDUSTRIES

The Gim-Pf panels allow air supply at any loca-tion of the access floor. These panels are entirely made of steel andcompatible with all other Gamma panels.

Detailedsketches

6

100

90

80

70

60

50

40

30

20

10

0

22002000

200 400 600 8001000

12001400

16001800

0 1 2 3 4 5 6 7Free section airspeed in m/s

Ove

rpre

ssure

in

th

e ple

num

in

Pa

With fully open damper

Flow m3/h

Without damper


Accessories

Gamma, an easy technology

The ramps are generally made of a woodenframe, and finished with a black anti-sliprubber.

The junction between the ramp and theaccess floor is a metallic profile. The rampnosing is made of an aluminium profile.

The recommended slope of a ramp is 5%,with a maximum of 10%.

Handling of loads on the ramps must bemade with appropriate means, under theresponsability of the user.

Steps and risers are made of white melamineboards and their top edging is finished withan anti-slip aluminium nosing.

The steps are covered with an anti-slip rubbercovering.

Bridging profiles are used when a raisedfloor must be installed over ducts, channels,conduits, or holes of large sizes.

These bridging profiles enable to suppressone or several pedestals.

Some of our panels are suitable for thefollowing coverings :

High pressure laminate

Vinyl

Linoleum

Textile

Rubber

Wood

Some others are available without covering.They can be covered with textile tiles usedwith access flooring, free laid on site.

When required by regulations, plenumdividers made of non combustible materialscan be supplied.

For this type of installation, panels lay onmetallic stringers. Stringers are used :

• For finished heights greater than 500mm.• For raised floors which are not surrounded

by walls, or which have to take loads withfrequent removals.

• For important point loads or distributedloads.

• For raised floors including a large numberof cut-outs.

Ramps Steps and risers

Plenum dividers Coverings

Installation with stringers

Panel lifting device

Bridging profiles

Outlets, type brush or type PVC


Technical information

Installation• The required finished level of the raised floor must be materialized by the architect or the building owner. The location of the first panel to be

installed is determined by the drawings, in such a way that the width of the panels cut along the walls will be more than 100 mm, providing agood stability.

• Handling and installation of any equipment or heavy material must be done on an added boarded flooring or load-spreading plates, rigid enoughto spread the loads, to prevent overloading, tearing or scratching of the floor covering.

Coverings

Coverings to be used• High pressure laminates : these coverings must not be used within rooms where abrasive dust may lay on the floor.• Soft coverings : vinyl, rubber or linoleum.• Textile coverings : needlepunch carpets, cut-piles carpets.• Parquets, mineral coverings and ceramics : the technical characteristics of these coverings must be checked carefully in order to determine if they

can be used with raised floors.

Suitability of coverings

High pressure laminates must be conform to Standard NF EN 438, NF EN 685 and NF EN 14041.The resilient floor coverings used with raised floors must be classed minimum 32 according to the classification of the Standard NF EN 685.Textile coverings to be used with raised floors must be classed 3 or 4 according to the classification of Standards NF EN 1470 or NF EN 1307,according to the type of covering.The design of the covering must not require any joint or centering, and tiles of covering must be interchangeable.

Factory bonded coveringsFloor coverings with a foam backing must be excluded.

Free laid coveringsIt concerns carpets tiles, free laid on site. Their dimensions, squareness, stability and installation must be conform to the requirements of the StandardNFP 62.202.1 (reference DTU 53.1).The use of a permanent adhesive between the raised floor and the carpet tiles must not make dismantling of the raised floor panels difficult. It isrecommended not to aline carpet tiles and raised floor panels.

Maintenance

Requirements for rooms to be installed with access floors (DTU 57-1)• Rooms must not be exposed to bad weather.• Rooms must be equipped with outside glazing.• Concrete slab and plaster walls must be dry.• Concrete slab must be conform to article 5.2.2 of DTU 21: the raw concrete is not allowed. The upper part of the concrete must resist when trying

to tear up manually a pedestal base bonded to the concrete. The concrete must be able to take the weight of the raised floor and the loadstransmitted by the pedestals bases.

• Rooms must not be encumbered with materials or tools and get a dry and clean concrete.• Rooms must be free of any of the other trade during installation.• All rooms adjacent to the access floor must have the same floor height.• The ambient temperature of the rooms where the access floor is to be installed should be kept between 5°C and 24°C and the relative humidity

between 45% and 70 %. If the temperature is above 24°C (but never above 30°C) the relative humidity should not be over 50%. The subfloortemperature should not be below 5°C.

• No water or any other liquid should be spread under or on top of the access floor.• No other trade is allowed to walk on the raised floor during its installation, for at least 48 hours.

Gamma, total safety

Excessive use of liquid products must be avoided.

The use of water can provoke swelling, oxidizing or destruction of the components of the panels.Cleaning products can damage the adhesives on the edges and corners. Even small quantities of a product can laminate the covering. Every covering has a data sheet for maintenance.


Mechanical performances and loading

A raised floor must be designed and produced in such a way to ensure the required mechanical resistance and stability. The required wor-king load must not cause deformation or failure of the raised floor.All systems must be tested according to requirements of the Standard NF EN 12825, and classifcations obtained after these testsmust be certified by an official test report from an independant body.

Acoustic insulation

When tested according to Standard EN ISO 140-12, our access floors can reach airborne sound insulation values from 44 to 54 dbA. The insulation to impact sound depends mainly on the type of coverings bonded on the panels. The textile coverings are the mostefficient.

Fire protection

The regulations for access flooring refer to :• the reaction to fire• the partitioning of the plenum• the calorific potential

They vary according to the use of the rooms and the classification of the building inside which the access floors are installed.

Reaction to fire In France, the Decree dated June 30 th, 1983 defines 5 classes for the materials : M0, M1, M2, M3, M4.The test method used is the radiation test. The tested side is the bottom of the panel.The classification of the superior part of the panel is the same as for the covering.

Partitioning of the plenum When required by regulation, plenum dividers made of non combustible materials can be supplied.Every partitioned area has a maximum surface of 300m2 and a maximum length of 30 meters. In case of fire, the partitioning limitsthe air circulation inside the plenum.

Electrostatic properties

The ability of a covering to accumulate electrostatic loads, and its ability to eliminate these loads are essential for the antistatic properties of anaccess floor. The measurement of the transversal resistivity (Ret) enables the estimation of the ability to eliminate electrostatic loads.Coverings are classed according to NF P 62.001 (Resilient floor coverings - Electrostatic behaviour) :

Class 1 : Astatic covering : RET > 1.109 V (ohms) and electrostatic charging potential < 2 KV.

Class 2 : Dissipative covering : 1.107 V < RET < 1.109 V (ohms) and electrostatic charging potential < 2 KV.

Class 3 : Conductive covering : RET < 1.107 V (ohms) and electrostatic charging potential < 2 KV.

All raised floors must have a transversal resitivity between 5.105 and 2.1012 ohms.

The equipotential connection is made by a copper strap network connecting certain pedestals to each other. This network is earthed by thecompanies in charge of the electrical wiring.

Technical information

GammaINDUSTRIES8


Technology

Doc complete-eng