COMEY Planchers Sureleves

The profession is mainly governed by two texts:
- standard NF EN 12825 defines the technical criteria
- DTU 57.1 covers the conditions for implementation.

The information given below is intended to explain the technical context of raised access floors to a lay public. More technical information is available for professionals. The standards are available in full from the relevant bodies.

This standard mainly defines the load and deflection ratings. The checks are performed on systems including panels + structure (pedestals alone or pedestals and stringers).

The load rating indicates the mechanical resistance of the systems. On COMEY products, the permissible load given corresponds to twice the breaking load. The products are rated from 1 to 6, 1 being the least resistant and 6 the most resistant.
E.g. a product rated 6 can withstand a maximum load of 5.88 tonnes.

The deflection rating indicates the distortion properties of the systems. The most rigid system has a rating of A and the most flexible is rated C.

Other tests regarding raised access floors. Among these:

- Soundproofing (NF EN ISO 140-12)
This text describes in detail how noise is transmitted through the air and from impacts. Floor coverings have a major role to play in this area. Removable loose-laid tiles have the best acoustic properties.

- Reaction to fire
Comey panels are rated M1 (non inflammable) or M0 (fire-proof) on the plenum side. The rating for the upper surface is that of the covering.

- Electrostatic properties (NF P 62-001 - EN 1815 and EN 1081)
The measurements cover the ability of the panel + covering to limit or prevent the build up of electrostatic charges and control their evacuation. There are 3 ratings: 1 antistatic, 2 dissipating and 3 conducting.

The technical conditions of the contract define the conditions for implementation of raised access floors. They state the temperature and humidity conditions and the general state of the premises to be fitted out. They specify that no one is allowed to walk on the floor during installation and for 48 hours after installation is complete. It lays out the measures to be complied with by the the installation companies and imposes rules for caution based on common sense.

The risk of earthquake must be taken into account when defining technical floors. There are certain areas in France concerned by this where our products are subject to specific precautions.

The choice of materials making up raised access floors is specified: panels, pedestals, stringers, surface treatment of metal materials, floor coverings and accessories. Finally, the special conditions of the contract define the work and how it is to be coordinated.

These standards are a reference
for management of a high quality worksite.