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 installations of different  services.

2. 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 telemetric purposes.
  • Data processing centers. Rooms for data storing and processing. They have a large amount of installations, even acclimatization, channeled 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.

3. What kind of installations can be channeled 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 acclimatization, 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. One of the most important technology is the under floor air distribution “ufad” see more.

4. 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 600×600 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 with adjustable height from 70 mm to 1500 mm. Learn more.
  • Stringers: steel bars that joins the pedestal heads in a horizontal way creating a rigid structure, modulated in 600×600 mm to support the raised access floor tiles. They make the system more stable and resistant.
5. What are the most frequent raised access panels in the market?
  • Steel core injected panel: it consists of two steel sheets electro 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. Learn more in GAMAFLOR FULL STEEL system.
  • Chipboard and steel core panel: it consists of a high density chipboard core with a galvanized steel bottom tray f with a strengthening edge trim protection and a top covering. It obtains the best fire rating and load resistance. Due to the use of galvanized steel damp-proof increases. Learn more in GAMAFLOR PAC system.
6. What are the most important technical characteristics to be noted when choosing a raised technical floor?
  • Heavy load resistance for raised access flooring
  • Fire-resistant classification, fire rating and smoke development
  • Damp-proof, humidity resistant
  • Acoustic values
  • Stability of raised access floor.
7. 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 aluminum foil 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 vulnerable to external aggressions.
8. When do POLYGROUP / GAMAFLOR raised floor systems need stringers?

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.

See more in our structure section.

9. What final heights are reachable with POLYGROUP raised access floor systems?

GAMAFLOR systems can be regulated to the most suitable ranging from 55 mm to 2000 mm. Height will depend on the volume of services and equipments to channel under the raised access floor, on the levelling at the surface and on other factors developed at the project.

10. Are there any special structures for seismic high risk places?

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

11. 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 in conductive section.

12. How are the pedestals fastened / anchored to the base floor / slab?

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 coverings options do the raised access floor systems offers?

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 the natural 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 analyze the possibility to apply any new covering that suits our customer’s need if it is compatible with our system.

See more in our architectural finishes section.

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.

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