Secondary Framing refers to
- Purlins
- Girts
- Eave struts
Purlin & Girt : Purlin & Girt typically refers to roof or wall framing members that span parallel to the building eave, and support the roof or wall decking sheeting. The purlins are in turn supported by rafters or walls. Purlins and girts are roll formed Z sections, generally 200 mm deep with 64 mm flanges. These can be lapped and nested at the supports which creates a continuous beam effect
C Channel : The structural channel, also known as a C-channel. Its cross section consists of a wide “web” and two “flanges” at the top and bottom of the web, only sticking out on one side of the web. They are also sometimes welded together back-to-back to form a non-standard I-beam.
Eave Strut : Eave struts are located along the sidewall; at the meeting line of the planes of the roof and wall. Generally, eave struts are 200 mm deep with flanges at top and bottom. The flanges are formed parallel to roof slope. It is manufactured from Cold Formed sections. Eave struts safely transfers longitudinal forces on the building from roof bracing to wall bracings.
