perling|Purlin vs. Joist — What’s the Difference?

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What Is A Metal Purlin?: Types, Sizes, Uses, And Cost

Purlins are horizontal beams or bars used for structural support in buildings, especially in roofs. Learn about different kinds of purlins, such as wood, steel, CEE, and ZED, and how to design them for various loads and spans.

A purlin (or historically purline, purloyne, purling, perling) is a longitudinal, horizontalperling, structural member in a roof. In traditional timber framing there are three basic types of purlin: purlin plate, principal purlin, and common。

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perling|Purlin vs. Joist — What’s the Difference?

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