Access floor System F.A.Q. - Access Floor Polygroup


1. What is a raised access floor?

A raised access floor consists of identical and independent horizontal panels supported by vertical pedestals adjustable in height which provide space under the flooring to house the required installations. There is quick accessibility to the installations because panels are easily detachable.

2. Which are the key elements of raised access floors?

The key parts of raised access flooring are:

  • Panels: raised access floor horizontal element to step on of 600x600 mm standard measure although it is possible to order other measures. There are different sort of panels according to their core, which will make their technical characteristics different.The system panels can be delivered with or without factory made floor coverings. Learn More.
  • Pedestals: vertical component of the structure the height of which can be regulated to the most suitable ranging from 70 mm to 1500 mm. Learn more.
  • Stringers: metallic part that joins the pedestal heads in a horizontal way creating a rigid structure, modulated in 600x600 mm to support the tiles. They give more stability and resistance to the system.

3. When is a raised access floor used?

Raised access floor systems are used in a great variety of areas in which a large amount of installations are required. Some examples are:

  • Banking, insurance, governmental, corporative and administrative offices companies with high level of computer and/or telecommunication equipment.
  • Call centers. Big spacious offices that require a large number of working posts to accomplish with computer and telematics purposes.
  • Data processing centers. Rooms for data storing and processing. They have a large amount of installations, even acclimatisation, channelled under the raised access flooring.
  • Cultural and educational centers. Raised access floors are used in these sorts of areas which are specifically designed for cultural and learning activities.

See more at areas of use.

4. What sort of installations can be channelled under the raised technical flooring?

Raised access floorings have a plenum where is possible to channel the following installations and services: electric power, data net, telecommunications net, air conditioning and acclimatisation, fire detection and extinguishing, security net and water and drain nets.
Using a raised access floor allows you having quick accessibility to these services for maintenance without the need of disturbing and expensive works.

See advantages of use.

5. What other alternatives to raised access flooring we had?

  • Suspended ceilings: Hidden trays at the suspended ceiling which descend through the post/pylon. Moving, maintenance, etc, were very expensive and would disturb the normal functioning of the area.
  • Pre-cast channels: They were used over 40 years ago creating channels at the cement structure where the working post had place. They did not allow the possibility of modifying a room and the installations maintenance was very expensive.
  • Metallic trays at sight: They are situated at the faces along the perimeter of the room with no aesthetics sense and it was difficult to take the connections to the working posts.
  • Furniture: Technical furniture has a channelled system but it is very expensive, also for the maintenance.

6. What are the most common panels used at raised access panels?

  • Steel core injected panel: it consists of two steel sheets electronically welded that are later injected with lightened cement. It holds heavy loads, it is fire-resistant and fully damp-proof and it provides the best acoustic absorption. See more in GAMAFLOR FULL STEEL system.
  • Chipboard and steel core panel: it consists of a high density chipboard sheet with a bottom tray made of galvanized steel with a strengthening edge trim protection and a top covering. It obtains the best fire-rated ranking and load resistance. Due to the use of galvanized steel damp-proof increases. See more in GAMAFLOR PAC/BANK system.

7. What are the most important technical characteristics to be noted when choosing a raised technical floor?

  • Heavy load resistance
  • Fire-resistant classification
  • Damp-proof

 8. What differences there are in the use of products manufactured in steel or aluminium?

  • The use of a panel bottom tray made of steel considerably increases its heavy-load capacity. Steel is an elastic, hard breaking resistance material that may deform but does not break. By using aluminium at the panel bottom sheet you can easily get a broken panel decreasing its load resistance capacity.
  • Steel obtains much better fire classification than steel according to UNE-EN 13501.
  • Steel protects the panel from external aggressions such as humidity, bad use or dirt. Aluminium can easily break leaving the system at the mercy of external aggressions.

9. When is the use of stringers needed at a POLYGROUP raised floor?

Stringers are made of steel and join the pedestals horizontally, creating a reticule to fully support the tiles.

GAMAFLOR PAC and BANK systems recommend the use of stringers for heights over 300 mm.

GAMAFLOR FULL STEEL system uses stringers when coverings are factory made in all possible heights. When they are manufactured without the coverings, the panel is screwed to the head of the pedestal and the stringers are used for heights over 450 mm.

10. What heights are possible to reach with POLYGROUP raised access floor systems?

GAMAFLOR systems can be regulated to the most suitable ranging from 70 mm to 1500 mm. Height will depend on the amount of installations and equipment which will be housed under the raised access floor, on the levelling at the surface and on other factors developed at the project.

Learn more about structures.

11. Are there any special structures for places where lateral movements or even earthquakes take place?

Yes, there are advanced structures which are screwed to the base floor to protect the system against earthquakes and to provide with better safety.

Learn more about structures.

12. How are the pedestals fastened to the base floor?

Steel pedestals are fastened to the base floor with polyurethane adhesive allowing them to be fixed to the base floor. Pedestals have nuts/threads at certain places to have the possibility to screw them to the base floor according to the needs.

13. What sort of coverings do we find at raised access floor systems?

There is a large number of coverings assembled on raised floor panels at the production centers.

To be noted are light floorings such as: vinyl, polystratic, linoleum, rubber, carpet, and also thenatural coverings such as granite, ceramic and natural wood ones.

There are other floorings made of stainless steel or glass that can also be used with our systems.

We analyse the possibility to apply any new covering that suits our customers´s need if it is compatible with our system.

14. Is there any regulation for raised access floor systems?

Europe and most of the countries around the world follow the UNE-EN 12825 for raised access floor systems. It is the most frequent one used in western and eastern markets.

Other regulation still in use is:

  • CISCA: It is used at north-American markets.
  • BSEN 12825: it used at the British Market.

15. What are the conductive characteristics of POLYGROUP systems?

GAMAFLOR raised access system is made of steel components that are always in contact along the system. This facilitates the electrostatic charges generated at the installations of the plenum to be conducted through the structure (pedestals and stringers) and later diverted to the ground.

There are transversal electricity conductive systems which facilitate the room electrostatic discharge.

See more about conductive system.

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