Rafter Ties For Shed Roof

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.

Rafter ties for shed roof.

T w 2 x h h x run rise where w equals rafter load h equals height of ridge and h equals distance from ridge to center of tie illustration below. If you are framing a cathedral ceiling there are a couple ways to deal with the need for rafter ties. Rafter ties or ceiling joists acting as rafter ties are required by code unless the house is designed so that the walls or a structural ridge beam carries the full load of the roof. They join at the peak of the roof by connecting to the opposing rafter or to a ridge beam that runs the length of the peak of the house or shed.

Here s a formula i use to determine tie force. In many situations you ll find that ceiling joists installed parallel to the rafters are intended to function as rafter ties. Many local counties across the country now require the use of hurricane ties for roof framing on homes and your shed is no different. We ll be using a ridge beam for this project so each set of rafters will meet a horizontal 2 6 at the apex which will run the length of the shed and connect to all of the rafters.

And when rafter ties are used above the plate the rafter span must be reduced by as much as 33 percent compared with the span allowed when the ties are at the plate. Sometimes the rafter will have a tail and extend out past the wall so that you have a soffit. The process will generally be the same for a shed of any moderate size but be sure to use the rafter sizing calculator above to find the correct rafter length and size for your shed rafter project. Some of these can support the roof and prevent ridge sagging and wall spreading.

Detailed and illustrated guides for building gambrel. 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. Rafters are installed piece by piece during the construction of the roof.