Secondary Members / Cold Formed Members
Secondary Framing Systems
Secondary framing consists of elements which support the roof and wall sheeting and transfer load to the primary framing.These include Roof Purlins, Wall Girts, Eave Struts, Clips etc.
Roof Purlins : Roof purlins are cold-formed Z profiles, normally 200 to 250 mm deep out of 1.6 to 3.15 mm thick steel. These are fixed to the top flanges of the rafters by means of clips bolted to the rafters, and the purlin web bolted to the clips. Partin ends overlap to act as continuous beams. metal roof and wall systems
Wall Girts :
Wall girts are cold-formed Z sections, normally 200 to 250 mm deep out of 1.6 to 3.15 mm thick steel. These are fixed to the outer flange of the side wall columns. There are two types of fixations:
Fixed to the outer flange of the side wall columns by means of clips bolted to the column and girt web bolted to the clips.Overlap connections are provided for continuous beam action.Endwall girts and flush girts on side walls are normally flushed to the outer flange of the columns by means of clips which are bolted to the column web and girt web bolted to the clips.