Roof Purlins | Rafters


Pole buildings use purlins, not rafters for main roof boards. Purlins are installed horizontally. Rafters are installed vertically from peak to eve. PURLINS  Purlins are sized according to snow load of specific location. Commonly 2x6’s are used at 24” on-center with posts set at 12’ apart. If posts are spaced [...]