Fire protection of steel columns

Fire protection for steel columns

 GEOFLAM® DC fire-resistant half-shells offer an optimum fire protection solution for metal columns. Their innovative design delays the spread of fire, heat and smoke, ensuring the safety of buildings and their occupants in the event of fire. 

GEOFLAM® DC half-shells are available in thicknesses from 25 mm to 45 mm, and in a range of sizes from 200 to 500 mm outside diameter. These elements protect metal posts from fire for up to 3 hours (R15 to R180). GEOFLAM® DC half-shells are assembled by gluing and polochonnage*. 

*polochonnage : a method involving the use of GEOCOL® glue, sisal filament and GEOPLASTER ® N to assemble the elements. 

 For the sake of simplicity, the minimum critical temperature value of Eurocode 1993-1-2 that can be used is: 500°C for compressed elements or elements subjected to axial bending and compression. 

In order to guarantee the stability of these steel structures in the event of fire, the solution is to slow down the rate at which the steel heats up, thereby favorably influencing its fire behavior. 

Following fire-resistance tests carried out at the EFECTIS France laboratory, we offer solutions validated by Procès-Verbal no. EFR-22-000930, using ½ shell GEOFLAM® DC to protect steel structures according to 

• The required duration of fire stability (R 15 to 180) 
• The critical temperature of the profile to be protected 
• The mass factor of the profile to be protected (in m-1) ; 

The assembly principle is very easy. In fact, the diameter of the ½ shells is chosen so as to leave a minimum gap of 10 mm between the metal profile and the inner wall of the shell. The metal profiles do not need to be prepared prior to application of the protection.