Secondary Framing
Secondary Members in the PEB industry refer mostly to longitudinal roof and wall members that are roll formed from galvanized coils. Secondary members used in a PEB include steel purlins, side runners, fascia channels, door posts, window posts, rafter stays and column stays base angles and other miscellaneous structural parts.
Roof Purlins
Purlins are pre-punched cold-formed “Z” shaped sections, 150, 200 or 250 mm in depth with stiffened flanges. The bottom flanges of roof purlins are attached to the outer (top) flanges of the rafters. Purlins are lapped at all interior frames in all structural framing systems.
Wall Girts
Wall girts are cold-formed from hot rolled steel coils ranging in thickness from 1.5 mm to 3.0 mm for “Z” shapes, and in 2.0 mm and 2.5 mm for “C” shapes (lipped channels). For Clear Span (CS) and Multi-Span (MS) buildings, the sidewall girts are attached (by-passed) to the outer flanges of exterior columns. Sidewall girts are lapped at all interior frames.
Eave Struts
Eave struts are C are pre-punched cold-formed “C” shaped sections, 180 mm in depth with 85 mm stiffened flanges. The eave strut serves as a longitudinal structural bracing member in addition to acting as a transition point for walls and roof sheeting.
