How To Measure Hip Roof Rafters

1 pyramid hip roof roof base is a square roof sides are identical isosceles triangles 2 hip roof roof base is a rectangle two sides are identical isosceles triangles and two sides are identical trapeziums.

How to measure hip roof rafters.

Divide the rise by the run the run is 12. Here you can calculate hip roof parameters by hip raise and. Select the following information by using the drop downs to enter values in feet and inches. The hip roof framing calculator returns the value of the main rafter the side rafter the length of the hip the height of the knee wall and the lengths of the jack rafters.

To do this your best bet is definitely finding a good hip roof construction calculator so that you can work it all out in a timely and simple fashion. Http amzn to 2sfscbz swanson speed square http amzn to 2svgnvt 16 x 24 framing square starrett http amzn to 2sflm5v milwaukee circular saw http amzn. Now mark 2 inches onto the timber which is a 1 4 of 8 alternatively if metric hold 200mm across and mark where 50mm falls. Then measure down that plumb cut the same distance as the common rafter s height above plate.

Hold the tape measure across the width of the timber and keeping the zero end in place pivot the other end of the tape round until the 8 inch mark meets the timber. Depending on the size of the roof most hip roofs will have 4 6 short jack rafters that are spaced out every 20 inches 51 cm between the hip rafters and the king common rafters. This will be the second of a series of three videos if you like t. Then mark another plumb cut 25mm over which denotes where the hip would touch the wall plate if it wasn t for the gap.

Find the distance between the ends of the ridge board and outside corner of the structure s upper wall plate similar to the way you measured for the king common rafters. Measure from the ridge board to the building s corners to size the hip rafters. In this video i will look at how to calculate the length of the ridge on a simple hip roof. Mark the length of the hip measuring down from the longest point of the plumb cut.

For any roof slope expressed as x in 12 rise in run the hip and valley factor is determined by finding the square root of rise run 2. That is where the seat cut should be made. Span for the main rafters measure from outside of wall to outside of wall. From your average hip roof calculator to something more specific like a hip roof rafter calculator there is plenty to consider with this kind of calculation.