RHSFB beam
At the perimeter of the building, it is often structurally more efficient and often architecturally desirable, to use an RHS section, which can resist torsional forces caused by eccentric loading on the beam.
The RHSFB comprises a Corus Celsius hot rolled rectangular hollow section in S355J2H steel to BS EN 10210, with a 12 mm or 15 mm thick S355 steel plate welded to the underside of the RHS. The RHSFB can achieve 60 minutes fire resistance without protection to the bottom plate where the bare outer face of the RHS is fire protected by fire stopping for compartmentation.
