How To Calculate Hip Roof Rafters

Includes result for hip valley factor slope factor and the roof slope in degrees.

How to calculate hip roof rafters.

If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters. Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. 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. The roof rafters provide integral structural support to the roof.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. Pitched roof rafter lengths for gable hip lean to roof construction how to calculate the length of common roof rafters you are ready to set out and cut the common rafter lengths as soon as the wall plates have been squared levelled and fixed strapped down onto the brickwork. 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. 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.

Hip roof area calculator. The pythagorean theorem allows you to calculate the length of the hip rafter without measuring it directly which requires you to climb onto the roof. As a do it yourself builder you can expand your knowledge of basic roof construction by calculating the length of the rafters for a particular roof section or room. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length.

Select the following information by using the drop downs to enter values in feet and inches. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Here is the online hip roof area calculator which helps you calculate the hip roof parameters such as roof rise common and hip rafters length and roof area based on width height of roof base and the roof pitch identical for all sides. Hip roof is a roof with a sharp edge or edges from the ridge to the eaves where the two sides meet.

Unlike rafters for flat roofs rafters for pitched gable and hip roofs rise at an angle from the outside walls and meet at a ridge. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same.