How Do You Figure Hip Roof Framing From Flat Drawings

The preview window displays a dimensioned plan view of the hip roof.

How do you figure hip roof framing from flat drawings.

3 inch rise per 12 run is a 3 12 pitch roof. To calculate a hip roof select hip from the roof type dropdown list or click on the corresponding button on the toolbar to calculate a hip roof. To do this do not make the tail cut until this has been established. Digits after the decimal point.

Mark the end plumb cut angle line back from square on both sides of the hip. Again once all cuts have been marked cut the pattern rafters test and you re ready to erect the roof framing. Select the following information by using the drop downs to enter values in feet and inches. For example say that 2 of the sides of your hip roof measure 6 feet 1 8 m 2 sides measure 10 feet 3 0 m and the roof is 3 feet 0 91 m high.

Roof rise h roof base length a roof base length a roof base width b roof base width b calculation precision. Depending whether the roof area is measured horizontally possibly from a drawing or photograph a correction factor is necessary to determine the actual area of the roof. Draw the sub fascia and finish fascia board on the end of the rafter and against the plumb tail cut. Vertical rise over horizontal run.

Given pitch and a horizontal area measurement multiply the horizontal area by a correction factor corresponding to pitch provided in the table below to determine the actual area of the roof to be used in the roofing material 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. Think of a flattened hip roof. It is not ideal for snow or heavy rain but modern materials and proper drainage have helped.

Here you can calculate hip roof parameters by hip raise and base parameters. Next you will want to look for a hip roof angle calculator so that you can make sure all of your precision detailing for the roof itself is going to be. Measure back from this line and mark a second parallel line on both sides of the hip. Roof pitch the roof pitch is the numerical measure of how steep or shallow a roof is.

To mark and cut hip plumb and side cuts with a circular saw print a paper template easy accurate or. For example you might need a hip roof framing calculator to work out the depth and the range of the frame that is to go up to make sure everything can be cut and prepared to the right size. Hip roof by roof raise length and width. A flat roof has a slope of 1 8 per foot to 2 12.

If you build a flat roof try to have it slope in multiple directions to drains or gutters. 4 12 through 9 12 are the most common pitches. This is the pointy end. Don t cut yet 2.

In the u s it is defined by the rise in inches to a 12 run.