PRG® is designed for use as window headers, garage door headers, portal frames and floor beams. It offers simple, one-piece installation that’s more efficient than bolting or nailing multi-ply dimension or structural composite lumber members together. PRG matched I-Joist depths and nominal wall widths for flush framing and are manufactured in framing appearance grade and is manufactured with superior strength southern yellow pine MSR Lumber. For a cost-efficient, high-strength solution to your load-bearing structural applications, choose PRG®