Roof Load Width

L stands for the span of the beam in feet.

Roof load width.

Step 2 determine dead load by identifying the amount of each construction material used in the roof. Intuitively this is the number of inches of snow on your roof in the place where the cover is the thickest. For the initial calculation f can be estimated at 1 000. Fill in the parts of the formula that are already known.

If you can t measure along the top chord divide the span horizontally from plate to plate by 2 then with a scientific calculator divide by cos cosine and then the pitch of the roof. This video looks at roof load width rlw. Length and width of your roof. Roofs are under a lot of pressure.

Load limits on the roof of a building. Rlw is used to calculate the sectional size of some roof members and supporting wall. You can enter these values in any units you d like including meters and feet. 4000mm 20 cos 4256 71mm.

F stands for the beam s fiber strength in bending which depends on the species of wood. 8000mm 2 4000mm. The total load is 4 000 pounds. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing.

You can enter this value either as a ratio x 12 or as an angle whichever suits you better. If your roof is pitched enter the length and width of the flat area covered by the roof. Multiply the length by the width to get the measurement for the area. In the example the beam spans the 10 foot width of the roof.