Attic Trusses And Rafter Ties

In many situations you ll find that ceiling joists installed parallel to the rafters are intended to function as rafter ties.

Attic trusses and rafter ties. 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. Collar ties rafter ties tension beams structural ridge beams. Collar ties may take up space in the attic of your home but they are there for a reason. In this how it works article managing editor debra judge silber explains the role of collar and rafter ties in the framing of a roof collar ties are necessary to prevent separation of the roof at the ridge due to wind uplift.

A rafter tie is a tension tie in the lower third of opposing gable rafters that is intended to resist the outward thrust of the rafter under a load. When it comes time to attach your roof be it trusses or rafters be sure to consider what best suits the needs of the structure you re building. Simpson strong tie category roof truss and rafter connectors ties and straps for cold formed steel construction. Since l is the half width of the roof the load should be w not w 2 and there are other serious things wrong with this.

Some of these can support the roof and prevent ridge sagging and wall spreading. Firstly the tributory width d should be 3d as only every third rafter is tied.