Roof Anatomy
What is Collar Tie?
Roofing Glossary · Roof Anatomy
Definition
A horizontal structural member that connects opposing rafters roughly in the upper third of the roof to prevent them from spreading apart under load. Collar ties resist the outward thrust that a loaded roof exerts on the walls and help stabilize the roof framing. They are typically required by building codes at every other rafter pair or per specified intervals.
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