Birtley has the only complete range of steel lintels manufactured from structural grade steels: S275JR/S355JR to EN10025- 2:2004. All Supergalv lintels are Hot-Dip Galvanized, post fabrication, in accordance with BS EN 1461:2009, giving an unrivalled 65μm zinc coating to all surfaces.
All external cavity wall lintels (exc SX/XHD) are insulated with expanded polystyrene to BS EN 13163. The insulation is CFC, HCFC and HFA free and has an ozone depletion potential of zero.
Birtley lintels have been tested to BS 476-20:1987 to determine the fire resistance of the load bearing elements of construction.Read more