Attic Insulation, Ventilation, Roof Framing, Roof Coverings: 2x4 purlins, 2x6 rafter, 1985 home Last
Post By: Jerry Peck on December 19, 2005 10:37 AM
It's probably not the size of the purlin which matters as much as the support of the purlin. Think of the purlin as a beam, the longer the span between supports, the larger it needs to be, but support it every 2 feet (an exaggeration) and a 2x4 on edge ...more... View
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