Roof Rafter Collar Ties

The prescriptive provisions of the building code require rafter ties on each rafter pair and collar ties every 4.

Roof rafter collar ties.

Collar ties attach. 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. Collar ties provide additional structural support for wood framed roofs that bear the weight of clay or concrete roofing tiles. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.

This is especially important if the home is in the northern climates where snow accumulates on roofs or if there are multiple layers of roofing materials. How to install collar ties to roof rafters. The collar ties are used to strengthen the roof rafters to prevent them from buckling or sagging under the weight of the roof. The rafter ties are incorrectly labelled as collar ties.

Some of these can support the roof and prevent ridge sagging and wall spreading. Collar ties may take up space in the attic of your home but they are there for a reason.