Fire Protection - Structural Steel - Beams

3 sided protection to steel beams using ColumnClad
The 25mm × 25mm lightweight metal angle is shot fired or spot welded to the underside of the beam top flange at 600mm centres. 100mm wide ColumnClad noggins are tightly fitted between the top and bottom flanges at max. 900mm centres and behind vertical board joints. 100mm ColumnClad noggins are also fitted across the bottom flange of the beam at the location of board joints.
 
The face boards are cut to suit the depth of the beam plus twice the thickness of the soffit board and are screw fixed to the metal angle sections at 300mm centres using Lafarge self tapping Grabber screws (which should penetrate channel by min. 10mm). Face boards are fixed to noggins using 50mm deep staples at 150mm centres.

Soffit boards are cut to suit the width of the beam flange plus 2mm and fixed to the fascia boards using 50mm staples at 150mm centres. The beam is progressively encased and adjacent boards are half staggered.
 
The encasement board should be cut to fit as tight as possible to the concrete soffit. Any gaps caused by the irregularity of the concrete surface should be filled with Lafarge Acoustic Sealant.
 
Additional Support
Where web dimensions exceed 600mm additional support may be required for the encasement.