Hip Roof Load Path

The continuous load path from the roof to the foundation has to resist uplift pressure that can rip roofs away from walls shear forces in the walls that brace the building sliding forces that tend to push the house off the foundation and overturning forces that tend to tip the house.

Hip roof load path.

Understanding the load path. Some of that load will be transferred down to wall at the bottom of the hip rafter and some to the ridge the hip is definitely carrying a load and so is the ridge now that its a hip roof it is carrying what has been transferred by the hip rafter. 1020 pounds per lineal foot. In the above example the supplier specified a humongous beam that did not appear justified.

16 inches 12 1 333 ft. Select drop the hip or back the hip from the dropdown list. A partial uniform loadis also expressed in plf but does not run the entire length of the member. There are no gable ends on a building with a hip roof.

10 psf x 6ft 60 pounds per lineal foot. 10 psf x 14ft 140 pounds per lineal foot. 20 psf x 6ft 120 pounds per lineal foot. Horizontal load path as the roof load pushes downward vertically the rafters tend to spread outward at their lower ends pushing against the walls of the house.

Its not just a frieze block anymore its holding up some weight. In hip roof designs all four exterior walls support the ends of roof rafters so all exterior walls bear a weight load from the roof above them. A uniform loadis a continuous load along the entire length of a member and is expressed in plf. Hip rafters must be dropped or backed so that the edges of the rafter won t interfere with the roof sheathing.

If hips are self supporting why are braces required. Some claim true rectangular or square hip roof structures are self supporting. Again this house has the same width dimension but it has 2 levels. Dropping a hip lowers the heel of the hip rafters while backing a hip involves beveling the top edges of the hip rafters.

To what extent do the opposing forces of a symmetrical hip roof system relieve the point load resulting from a roof brace.