Systems

BSEN 12825 - Key Performance

In July 2001 a European Standard EN 12825 was approved by CEN as a voluntary specification for private projects and mandatory for public projects. This standard is now mandatory for all projects across the member states of the EU. This specification outlines classifications for raised access floor systems based on their ultimate load; this is the load at which failure occurs. The raised access floor system is tested to its ultimate load under the application of a 25mm x 25mm point load at a predetermined rate until failure occurs. During the application of this load the deflection of the floor panel is measured to produce a graph of applied load against deflection. This information is then used to determine the classification of the floor system. Raised floor systems are classified in terms of ultimate load, safety factor, deflection under working load and dimensional tolerances.

The classification system allows for six classes of ultimate load ranging from greater than 4kN to greater than 12kN. Against each of these six ultimate loads there is a choice of a safety factor of 3 or 2. Further for each of these ultimate load and safety factors three maximum deflections under working load conditions are available namely 2.5mm, 3.0mm and 4mm.

What BS EN 12825 does not intend to do is interpret the classifications or advise which class of raised access floor would be suitable for a specific application. The product application chart shown below gives guidance as to product classification against specific areas of application. These classifications are based upon the ultimate load determined in the manner prescribed within BS EN 12825. Further these classifications are based on a 2.5mm deflection under working load conditions and a safety factor of 3, these are best suited for most applications when taking due regard for the UK construction industry and the expectations of raised access flooring with regard to panel deflection etc.

Therefore a typical classification might be outlined as 3/A/3/2 where;-

  • 3 is the ultimate load class in excess of 8kN
  • A is the deflection under instantaneous working load of less than 2.5mm
  • 3 is the safety factor
  • 2 is the dimensional tolerances classification

     
RMF Floor  BS EN 12825 Classification  Finished Floor Height (FFH)
Light Use Standard Use Heavy Use Service Void Heavily Serviced & HVAC Floor Finishes
General Office 1/A/3/2 3/A/3/2 5/A/3/2 50 - 150mm 300 - 450mm Carpet Tiles
  1.33kN working load 2.67kN working load 3.3kN working load  
Service Corridors 1/A/3/2 3/A/3/2 5/A/3/2 50 - 150mm 300 - 450mm Carpet Tiles
  1.33kN working load 2.67kN working load 3.3kN working load  
Computer Rooms 1/A/3/2 4/A/3/2 6/A/3/2 N/A 300 - 600mm Vinyl / HPL
  1.33kN working load 3kN working load 4kN working load  
Data Centre 4/A/3/2 6/A/3/2 6/A/3/2 N/A 300 - 600mm Vinyl / HPL
  3kN working load 4kN working load 4kN working load  
Comms Room 1/A/3/2 4/A/3/2 6/A/3/2 300 - 450mm 300 - 600mm Vinyl / HPL
  1.33kN working load 3kN working load 4kN working load  
Reception Areas 2/A/3/2 3/A/3/2 5/A/3/2 50 - 150mm 300 - 450mm Carpet Tiles
  2kN working load 2.67kN working load 3.3kN working load   Speciality finishes
Educational 1/A/3/2 3/A/3/2 5/A/3/2 50 - 150mm 300 - 450mm Carpet Tiles
  1.33kN working load 2.67kN working load 3.3kN working load  
Print Rooms 4/A/3/2 6/A/3/2 6/A/3/2 150 - 300mm 300 - 450mm Vinyl
  3kN working load 4kN working load 4kN working load   Rubber
Call Centres 2/A/3/2 3/A/3/2 5/A/3/2 150 - 450mm 300 - 450mm Carpet Tiles
  2kN working load 2.67kN working load 3.3kN working load  
Trading Floors 3/A/3/2 5/A/3/2 6/A/3/2 150 - 300mm 300 - 450mm Carpet Tiles
  2.67kN working load 3.3kN working load 4kN working load  
Retail 4/A/3/2 6/A/3/2 6/A/3/2 50 - 150mm 300 - 450mm Vinyl
  3kN working load 4kN working load 4kN working load   Speciality finishes
Light Industrial 4/A/3/2 6/A/3/2 6/A/3/2 300 - 450mm 300 - 450mm Vinyl / HPL
  3kN working load 4kN working load 4kN working load   Speciality finishes