Mezzanine Secondary Beams and accessories are lipped cee section profiles, manufactured from pre-galvanised S450 grade steel, with a minimum yield strength of 450N/mm². Steadmans cold rolled products are formed from hot dipped galvanised steel coil to BS EN 10326:2004 Fe E390G-Z275. The load span tables in the Purlins, Rails and Eaves Beam Design Guide have been derived in accordance with BS 5950-5:1998 ‘Code of practice for design of cold formed thin gauge sections’.