INDUSTRIES. Raised access floors

Transcription

1 Raised access floors

2 1 YOUR PARTNER The leader in France for raised access flooring. A status obtained due to the quality of our installations. Prestigious references. 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. Issy les Moulineaux At every stage, dedicated personnel. Grande Arche and CNIT - La Défense Cité des Sciences - La Villette 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 CBX Tower,

3 2 Raised access floors GAMMA has been designing, manufacturing and installing raised access floors from their origins. We offer : Total commitment from initial design, through installation to final use. A modern and efficient manufacturing plant. The expertise of our teams. the industrial dynamics

4 3 The guarantee of quality The Quality Management System of GAMMA is based on the International Standard ISO 9001 (version 2000). Strict controls at every stage of the production enable to guarantee the required level of quality. Quality Management System GAMMA has a reputation for quality products and services. This level of quality is achieved due to a strict and methodic organisation. Quality policy and targets of GAMMA are defined within our Quality Assurance Guide. Identification and tracability are the key words of our system. GAMMA can meet the criterias of Haute Qualité Environnementale (HQE) required by customers, due to : Selection of the raw materials used. Industrialization of our production processes. Mechanical and acoustic performances of our products. Policy for reduction of our packing products and industrial waste. Quality control and final control Laboratory and testing apparatus, a realistic approach

5 9 The families 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, a wide selection

6 The response to your needs Headquarters GAMMA has efficient technical and sales departments ensuring the selection of the most suitable raised floor to meet your requirements. GAMMA A 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. The families ALUCAST BUROBOX BUROBOX M0 BUROPAC GAMMABOX GAMMABOX M0 GAMMACORE GAMMAPAC GIM MINIGAM 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 GAMMA refers to the European Standard NF EN for all its tests and controls. 4

7 Burobox The Burobox panel is widely used in office buildings. It can be covered with textile tiles used with access flooring, free laid on site. Composition The 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. Coverings The Burobox panel is available without covering. Dimensions Standard 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 ). Electrical resistance It varies from 5x10 8 to 2x10 12 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 46 to 51 dba, depending on the thickness of the panel and the covering (Dn,f,w according to Standard EN ISO ). Load classes Burobox 30 Burobox 38 Framework Stringers 30/15 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 Nr Nr Nr NB : A system classed 1A is a system for which 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 less than 2.5 mm (deflection class A). Survey Institute : SOCOTEC CONSULTING. See tables below for the other classes. Load classes according to NF EN and using safety factor = 2.0. Load class Ultimate load Working load Class 1 Class 2 Class Class 4 Class Class >4kN >6kN >8kN >9kN >10kN >12kN >2kN >3kN >4kN >4.5kN >5kN >6kN Deflection class A (the most stringent) B C (the least stringent) Maximum deflection 2.5 mm 3.0 mm 4.0 mm Burobox

8 Buropac The Buropac panel has been specially designed for use in offices and computer rooms. This panel is also recommended for rooms with non-magnetic requirements. It is suitable for all the coverings used with access flooring. Composition The 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. Dimensions Standard 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 ). Electrical resistance It varies from 5x10 5 to 2x10 12 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 to 50 dba, depending on the covering (Dn,f,w according to Standard EN ISO ). Load classes Buropac Framework Stringers 30/15 Class 1A (or 1B or 2C) 2A (or 3B or 4C) Certificate Nr Nr NB : A system classed 1A is a system for which 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 deflection less than 2.5 mm (deflection class A). Survey Institute : SOCOTEC CONSULTING. See tables below for the other classes. Load classes according to NF EN and using safety factor = 2.0. Load class Ultimate load Working load Class 1 Class 2 Class Class 4 Class Class >4kN >6kN >8kN >9kN >10kN >12kN >2kN >3kN >4kN >4.5kN >5kN >6kN Deflection class A (the most stringent) B C (the least stringent) Maximum deflection 2.5 mm 3.0 mm 4.0 mm Buropac

9 box The box panel has been specially designed to meet the requirements of technical, data processing and scientific applications. It is suitable for all the coverings used with access flooring, excepted textile and mineral coverings. Composition The box 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. Coverings The box panel is available with the following coverings : High pressure laminate Vinyl Dimensions Standard size : 600 mm. Linoleum Rubber Fire classification The box panel is classed M1 (SNPE report n ). Electrical resistance It varies from 5x10 5 to 2x10 12 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 46 to 51 dba, depending on the thickness of the panel and the covering (Dn,f,w according to Standard EN ISO ). Load classes box 30 box 38 Framework Stringers 30/15 Stringers 45/15 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 Nr Nr Nr Nr NB : A system classed 1A is a system for which 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 less than 2.5 mm (deflection class A). See tables below for the other classes. Survey Institute : SOCOTEC CONSULTING. Load classes according to NF EN and using safety factor = 2.0. Load class Ultimate load Working load Class 1 Class 2 Class Class 4 Class Class >4kN >6kN >8kN >9kN >10kN >12kN >2kN >3kN >4kN >4.5kN >5kN >6kN Deflection class A (the most stringent) B C (the least stringent) Maximum deflection 2.5 mm 3.0 mm 4.0 mm box

10 core The core panel is famous on the world market for its quality, design and finish. It is characterized by an extruded aluminium edging inserted into the core. This panel has been designed to meet the requirements of technical, data processing and scientific applications. It is suitable for all the coverings used with access flooring, except textile and mineral coverings. Composition The core 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 core panel is available with the following coverings : High pressure laminate Vinyl Dimensions Standard size : 600 mm. Special sizes, on request. Linoleum Rubber Fire classification The core panel is classed M1 (SNPE report n ). Electrical resistance It varies from 5x10 5 to 2x10 12 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 46 to 51 dba, depending on the covering (Dn,f,w according to Standard EN ISO ). Load classes core Framework Stringers 30/15 Class 1A (or 2B or 4C) 2A (or 3B or 5C) Certificate Nr Nr NB : A system classed 1A is a system for which 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 less than 2.5 mm (deflection class A). See tables below for the other classes. Survey Institute : SOCOTEC CONSULTING. Load classes according to NF EN and using safety factor = 2.0. Load class Ultimate load Working load Class 1 Class 2 Class Class 4 Class Class >4kN >6kN >8kN >9kN >10kN >12kN >2kN >3kN >4kN >4.5kN >5kN >6kN Deflection class A (the most stringent) B C (the least stringent) Maximum deflection 2.5 mm 3.0 mm 4.0 mm core

11 pac pac panels are multipurpose panels designed to meet a wide range of applications. They are suitable for all coverings used with access flooring. Composition The pac 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. Coverings The pac panel is available with the following coverings : High pressure laminate Vinyl Dimensions Standard size : 600 mm. Size 675 mm for thickness 38 mm. Special sizes, on request. Linoleum Textile covering Rubber Options For panels without covering only : Top varnished. Top plate of 0.5 mm thick galvanized steel. Fire classification The pac panel is classed M1 (SNPE report n ). The pac panel, 38mm thick, is classed F30, according to DIN Electrical resistance It varies from 5x10 5 to 2x10 12 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 to 50 dba, depending on the thickness of the panel and the covering (Dn,f,w according to Standard EN ISO ). Load classes pac 30 without covering pac 30 with HPL covering Framework Stringers 30/15 Stringers 30/15 Class 1A (or 1B or 2C) 2A (or 3B or 4C) 2A (or 2B or 3C) 2A (or 3B or 4C) Certificate Nr Nr Nr Nr NB : A system classed 2A is a system for which the ultimate load is at least 6kN (load class 2). The working load of this system is at least 3 kn, with a safety factor of 2, for a deflection less than 2.5 mm (deflection class A). pac 38 Stringers 30/15 2A (or 4B or 5C) 4A (or 5B or 5C) Nr Nr See tables below for the other classes. Stringers 45/15 5A (or 5B or 5C) Nr Survey Institute : SOCOTEC CONSULTING. Load classes according to NF EN and using safety factor = 2.0. Class 1 Class 2 Class Class 4 Class Class Load class Ultimate load >4kN >6kN >8kN >9kN >10kN >12kN Working load >2kN >3kN >4kN >4.5kN >5kN >6kN Deflection class A (the most stringent) B C (the least stringent) Maximum deflection 2.5 mm 3.0 mm 4.0 mm pac

12 Burobox M0 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. Composition The 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. Coverings The Burobox M0 panel is available without covering. Dimensions Standard 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 classification The Burobox M0 panel is classed M0 (SNPE reports n and ). Electrical resistance It varies from 5x10 8 to 2x10 12 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 49 to 54 dba, depending on the thickness of the panel and the covering (Dn,f,w according to Standard EN ISO ). Load classes Burobox M0 From 1 A à 3 A depending on thickness of the mineral and steel plates used. NB : A system classed 1A is a system for which 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 deflection less than 2.5 mm (deflection class A). Survey Institute : SOCOTEC CONSULTING. See tables below for the other classes. Load classes according to NF EN and using safety factor = 2.0. Load class Ultimate load Working load Class 1 Class 2 Class Class 4 Class Class >4kN >6kN >8kN >9kN >10kN >12kN >2kN >3kN >4kN >4.5kN >5kN >6kN Deflection class A (the most stringent) B C (the least stringent) Maximum deflection 2.5 mm 3.0 mm 4.0 mm Burobox M0

13 pac M0 The family pac M0 panels are multipurpose panels designed to meet a wide range of applications. They are widely used to suit access floors in High Rise Buildings. Composition The pac 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 pac M0 panel is available with the following coverings : 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 classification The pac M0 panel is classed M0. Electrical Résistance Depending on the properties of the covering, it varies from to ohms, measured with the covering. Acoustic The acoustic insulation measured between 2 adjacent rooms separated by a densely insulated partition, varies from 49 to 54 dba depending on the covering (Dn,f,w according to Standard NF EN ISO ). Load Classes GAMMAPAC M0 Framework Class Certificate 1A (or 1B or 1C) Nr Stringers 30/15 2A (or 2B or 2C) Nr Stringers 45/15 2A (or 2B or 2C) Nr NB : A system classed 1A is a system for which the ultimate load is at least 4 kn (load class 1). The working load of this system is at least 2kN with a safety 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 Safety factor = 2 Load Class Deflection Class Maximum Deflection Ultimate load > 4kN > 6kN > 8kN > 9kN > 10kN > 12kN A (the more stringent) 2.5 mm Working load > 2kN > 3kN > 4kN > 4.5kN > 5kN > 6kN B 3.0 mm C (the least stringent) 4.0 mm pac M0

14 Minigam The Minigam panel has been designed for offices where the available height for access floors is limited. The Minigam panel is classed M0 (incombustible), and is characterized by a thickness of 19mm only. It can be covered with textile tiles used with access flooring, free laid on site. Composition The 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. Coverings The Minigam panel is available without covering. Dimensions Standard size : 500 mm. Fire classification Minigam panel is classed M0 (SNPE ). Electrical resistance It varies from 5x10 8 to 2x10 12 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 47 to 50 dba, depending on the covering (Dn,f,w according to Standard EN ISO ). Load classes Minigam Framework Class 1A (or 1B or 1C) Certificate Nr NB : A system classed 1A is a system for which 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 less than 2.5 mm (deflection class A). See tables below for the other classes. Survey Institute : SOCOTEC CONSULTING. Load classes according to NF EN and using safety factor = 2.0. Load class Ultimate load Working load Class 1 Class 2 Class Class 4 Class Class >4kN >6kN >8kN >9kN >10kN >12kN >2kN >4kN >4kN >4.5kN >5kN >6kN Deflection class A (the most stringent) B C (the least stringent) Maximum deflection 2.5 mm 3.0 mm 4.0 mm Minigam

15 Alucast Alucast is an aluminium die-cast panel of great strength. Alucast is suitable for industrial and high-tech clean room installations, and for rooms with non-magnetic requirements. The panel is suitable for all the soft coverings normally used for access flooring. Composition The 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 to reach the levels of performance and accuracy required for high-tech applications. Alucast PF2 : Perforated panel 11 % Coverings The Alucast panel, plain or perforated, is available with the following finishes : vinyl. rubber The Alucast grating (AF6) is available rough or epoxy painted. Dimensions Standard size : 600 mm. Fire classification Without covering, the Alucast panel is classed M0 (incombustible), by nature. Alucast PF4 : Perforated panel 22 % Electrical Resistance It varies from 5x10 5 to 2x10 12 ohms, depending on the properties of the covering. Load classes Alucast AF6 : Grating 60 % 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 plain panel Alucast PF4 (22%) Framework Class 6A (or 6B or 6C) 6A (or 6B or 6C) Certificate Nr Nr NB : A system classed 6A is a system for which the 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 less than 2.5 mm (deflection class A). Survey Institute : SOCOTEC CONSULTING. Load classes according to NF EN and using safety factor = 2.0. Class 1 Class 2 Class Class 4 Class Class Load class Ultimate load >4kN >6kN >8kN >9kN >10kN >12kN Working load >2kN >3kN >4kN >4.5kN >5kN >6kN Deflection class A (the most stringent) B C (the least stringent) See tables below for the other classes Maximum deflection 2.5 mm 3.0 mm 4.0 mm Alucast

16 Pedestals 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 pedestal The 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 height The threaded steel head allows an adjustment of + or - 7 mm. The panels lay directly on a conductive pad. These pedestals allow a minimum finished height of 70 mm. Standard pedestal 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 the standard pedestal. Installation The pedestals are bonded to the concrete by way of a special adhesive, or may be mechanically fixed. A device on the baseplate permits a quick and safe fixing of the copper earthing strap. Pedestal low height Pedestal great height Stringers Lockable stringers They are made of galvanized steel. They are designed for location on pedestal heads. The stringers provide rigidity to the understructure, and stability against lateral strain. The depth of the section is adapted to the required performances : 30 mm deep : type 30/ mm deep : type 45/15. Lockable stringer Special stringers When 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 may be 20% more than for the rest of the raised floor. 31bis, rue des Longs Prés Boulogne - Billancourt (France) Raised access floors Tel. : 33 (0) Fax : 33 (0)

17 6 GAMMA industries France - 10/ Detailed sketches Riser Standard perimeter detail Minimum width of perimeter cuts : 100mm Special perimeter detail Minimum free height : 50mm Special perimeter detail Maximum void width : 60mm Dilatation joint Standard case Detail of profile over void along facade Void greater than 60mm

18 Accessories Ramps The ramps are generally made of a wooden frame, and finished with a black anti-slip rubber. The junction between the ramp and the access floor is a metallic profile. The ramp nosing 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 be made with appropriate means, under the responsability of the user. Steps and risers Steps and risers are made of white melamine boards and their top edging is finished with an anti-slip aluminium nosing. The steps are covered with an anti-slip rubber covering. Installation with stringers For this type of installation, panels lay on metallic 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 with frequent removals. For important point loads or distributed loads. For raised floors including a large number of cut-outs. Bridging profiles Bridging profiles are used when a raised floor must be installed over ducts, channels, conduits, or holes of large sizes. These bridging profiles enable to suppress one or several pedestals. Plenum dividers When required by regulations, plenum dividers made of non combustible materials can be supplied. Coverings Some of our panels are suitable for the following coverings : High pressure laminate Vinyl Linoleum Textile Rubber Wood Some others are available without covering. They can be covered with textile tiles used with access flooring, free laid on site. Panel lifting device Outlets, type brush or type PVC,an easy technology 5

19 7 Technical information 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 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 loads transmitted 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 subfloor temperature 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. 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 a good stability. Handling and installation of any equipment or heavy material must be done on an added boarded flooring or load-spreading plates, rigid enough to 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 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 coverings Floor coverings with a foam backing must be excluded. Free laid coverings It concerns carpets tiles, free laid on site. Their dimensions, squareness, stability and installation must be conform to the requirements of the Standard NFP (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 is recommended not to aline carpet tiles and raised floor panels. Maintenance 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., total safety

20 Technical information 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 working 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 tests must be certified by an official test report from an independant body. Acoustic insulation When tested according to Standard EN ISO , 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 most efficient. 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 300m 2 and a maximum length of 30 meters. In case of fire, the partitioning limits the 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 an access 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 (Resilient floor coverings - Electrostatic behaviour) : Class 1 : Astatic covering : RET > (ohms) and electrostatic charging potential < 2 KV. Class 2 : Dissipative covering : < RET < (ohms) and electrostatic charging potential < 2 KV. Class 3 : Conductive covering : RET < (ohms) and electrostatic charging potential < 2 KV. All raised floors must have a transversal resitivity between and ohms. The equipotential connection is made by a copper strap network connecting certain pedestals to each other. This network is earthed by the companies in charge of the electrical wiring. 8