Irregular Pitch Hip Roof

From the front elevation the roof will look bigger and less pointy than it would be if the pitches were regular.

Irregular pitch hip roof. Such buildings may have more than four hips in the roofs and they form valleys at the inside corners. 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. Minor side roof pitch minor. 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.

Select the following information by using the drop downs to enter values in feet and inches. The 12 12 minor pitch was always a welcome scenario. Minor pitch 10 12 plan angle between hip roof eaves 120. The rise of rhe major pitch is the run of the minor.

We are the professionals for the future of the craft of carpentry. Major side roof pitch major. Next click on the hip angles button and then click on the hip valley rafter slope angle text. Irregular hips geometry based on billy dillon s article in the sept.

This type of roof is also called broken back hip and valley roof because the main hips are intconeected by the rafter of gables on one side and the rafter of the valley on the other. A hip and valley roof may be part of an irregular structure. Modern residential hip roof construction uses common pitch ratios in general. The most common hip roof pitch ratios fall between 4 12 and 6 12 although variations occur based on factors such as snow rain and wind conditions which is because steeper hip roof pitch ratios allow for less accumulations of snow and rain on the roof and lower ratios provide less wind resistance.

Dedicated to the art of carpentery roof framing. We ll use the 12 as the rotation point on the framing square and move the other end of the framing square to the edge of the hip rafter material using the 6 rotation dimension. Major side roof span building width ridge thickness 2. It will display the framing square usage for the slope angle of the hip rafter 27 50055 6 12.

Hip pitch angle example irregular hips geometry dxf drawing. Solution of irregular hip roof plan angle formula an angle inscribed in a semi circle is a right angle. The quadrilateral in plan bounded by the eaves major side common run and minor side common run may be circumscribed. Select the input type from the input menu imperial english inch base 12 default enter roof pitches from 1 24 like 8 for an 8 12 pitched roof metric 300mm base enter millimeters like 200 for a 33 69007 roof pitch angle decimal inch base 10 enter base 10 decimal numbers like 5 7735 for a 30 roof pitch angle degrees input.

2007 jlc on complex roof geometry. All formulae are below the calculator.