Hip Rafter Hip Rafter

The hip rafter can be quite confusing as there’s a lot of calculations that may need to be done to find out the information for it. The hip rafter is a rafter that runs from the corner of the building to the ridge.

This angle is a 45 degree angle. There are charts out there that serve as a quick reference guide for finding the length of the hip rafter. These charts are usually found on a framing square. If you don’t happen to have one at the time you can always use the Pythagorean Theorem to find the length.

How to use the Pythagorean Theorem to Find the Length of the Hip Rafter

The length of the hip rafter can be found by using a^2 + b^2 = c^2 where c = the length of the hip rafter. So to find c you simply have to take the square root of a^2 + b^2. By doing this you will be able find the length of the hip rafter.

The Pythagorean Theorem can also be used to find the height of the rise if needed too by solving for b rather than c. One final important point to note is that the hip rafter should always be at a 45 degree angle.

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