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  • Writer's pictureCid Herlein

Collar Ties

A collar tie is a tension tie in the upper third of opposing gable rafters that is intended to resist rafter separation from the ridge beam during periods of unbalanced loads, such as that caused by wind uplift, or unbalanced roof loads from snow. 


If collar ties or ridge straps are installed to connect opposing rafters, they must be located in the upper third of the attic space.

In high-wind areas, uplift can tear a roof off of a house if it's not properly attached.


Collar ties and ridge straps should be installed on roof with a minimum slope of 3:12, a maximum wind speed of 100 miles per hour, and a maximum roof span of 36 feet. 

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