Secondary Members

Secondary framing comprises high-precision components that stabilize the roof and wall cladding while efficiently transferring loads to the primary structural steelwork. This integrated system principally including Roof Purlins, Wall Girts, and Eave Struts is engineered to minimize lateral displacement, optimize material efficiency and ensure the long-term rigid alignment of the building envelope.

Roof Purlins

Roof Purlins are cold-formed Z-profiles, normally 200 to 250 mm deep, made out of 1.6 mm to 3 mm thick steel. These are fixed to the top flange of the rafters by means of clips bolted to the rafters, and the purlin webs are bolted to the clips. Purlin ends are overlapped to act as continuous beams.  

Wall Girts

Wall Girts are cold-formed Z-sections, normally 200 to 250 mm deep, made out of 1.6 mm to 3 mm thick steel. These are fixed to the outer flange of the sidewall columns by means of clips bolted to the column, and the girt webs are bolted to the clips. Girt ends are overlapped to act as continuous beams.

Eave Struts

Eave Struts are C-profiles, normally 200 to 250 mm deep, made out of 2 mm to 3 mm thick steel. These are fixed to the outer flange of the sidewall columns by means of clips bolted to the column, and the eave strut bottom flange is bolted to the clips.