Octagon Hip Roof Calculator

Here s a drawing showing how to calculate the hip rafter slope angle for an octagon roof the old fashion way using a cmc calculator.

Octagon hip roof calculator.

This octagon tower rafter script calculator will return the octagon rafter geometry angles and trigonometry rafter measurements for octagon tower roof framing with a structural ring support. How many sides does an octagon have. This calculator will help you estimate hip roof parameters including rafters and roof area person outline anton schedule 2011 08 29 17 53 20 one of users asked us to create calculator which will help him estimate hip roof parameters like rafter s lengths roof rise and roof area. Or they could have purchased a chappell master framing square that has the hexagon and octagon roof framing information printed on the square.

If you do not have a great deal of experience in laying out hip tails then you should check the measurements directly on site. An octagon is a polygon with 8 sides delimiting a closed area anyone with a basic understanding of greek should be able to easily answer the question how many sides does an octagon have without any notions of mathematics. Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results. If the answers look wrong then verify the answers with a calculator.

The hip rafter pitch is the common rafter pitch over 13 in like 8in 13in for an 8in 12in roof pitch. Explore a number of housing related calculators as well as hundreds of other calculators covering topics such as finance math health fitness and more. The pitch is based on a 12 run on the framing square. The octagon plan angle is 67 50.

The hip rafter angle is not the same as a 90 plan angle. Use at your own risk. Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same.

This free roofing calculator estimates the area of a roof and the amount of materials required to replace or build said roof. For example a 12 12 roof pitch would have 11 1 16 12 pitch hips. All online tools use javascript to calculate the dimensions. How to use the hip roof framing calculator 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.