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What is a purlin bearing leg?

What is a purlin bearing leg?

A purlin bearing return is an extension of the edge of the R-Panel that rests on the roof purlin or roof deck and provides support for installers. R-Panels with a PBR are typically utilized on roof applications because roofing contractors prefer the extra support when installing the roofing panels.

What is a purlin used for?

Purlin plates are beams which support the mid-span of rafters and are supported by posts. By supporting the rafters they allow longer spans than the rafters alone could span, thus allowing a wider building.

What does PBR stand for in sheet metal?

PBR Panel Metal Roofing PBR panel stands for purlin bearing R panel. This means that the panels have a larger overlap section that completely overlaps the next panel. This creates more metal to metal contact which yields a stronger connection and more weather-tight metal roof panels.

What is the difference between a purlin and a joist?

Joists are always horizontal. Rafters are only found in roof structures, never under floors. Purlins are crossbeams supported by rafters. They provide more area for attaching the roof decking.

What does purlin look like?

In architecture, structural engineering or building, a purlin (or historically purline, purloyne, purling, perling) is a horizontal beam or bar used for structural support in buildings, most commonly in a roof. Purlins are supported either by rafters or the walls of the building.

What does PBE mean?


Acronym Definition
PBE Public Beta Environment (game software testing)
PBE Place-Based Education
PBE Protective Breathing Equipment
PBE Perfect Bayesian Equilibrium

How wide is a PBR panel?

The 26 gauge panels can span up to 4′, and the heavier 24 gauge panels can span up to 5′.

How do you fasten purlin?

Lay the first purlin at the ridge of the roof down to the chalk line beginning at either corner. Fasten the purlin with 16d common nails into each vertical rafter. Insert two equally spaced nails into the rafter. The rafters are generally spaced every 16 inches on center.