How Do You Figure Hip Roof Framing From Flat Drawings

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.

How do you figure hip roof framing from flat drawings.

Use the bottom edges of these boards to mark the level line cut. Think of a flattened hip roof. 3 inch rise per 12 run is a 3 12 pitch roof. Roof rise h roof base length a roof base length a roof base width b roof base width b calculation precision.

If you build a flat roof try to have it slope in multiple directions to drains or gutters. 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. To do this do not make the tail cut until this has been established. Roof pitch the roof pitch is the numerical measure of how steep or shallow a roof is.

In the u s it is defined by the rise in inches to a 12 run. Again once all cuts have been marked cut the pattern rafters test and you re ready to erect the roof framing. This is the pointy end. Measure back from this line and mark a second parallel line on both sides of the hip.

4 12 through 9 12 are the most common pitches. It is not ideal for snow or heavy rain but modern materials and proper drainage have helped. This is the line to cut along. 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.

Digits after the decimal point. 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. Finally divide the area of the whole roof by the area of one plywood sheet to figure out the number of sheets you ll need. 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.

Hip roof by roof raise length and width. 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. A flat roof has a slope of 1 8 per foot to 2 12. Select the following information by using the drop downs to enter values in feet and inches.

The preview window displays a dimensioned plan view of the hip roof. Here you can calculate hip roof parameters by hip raise and base parameters. Mark the end plumb cut angle line back from square on both sides of the hip. 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.