Roof Load Width Formula

If you want to calculate these values by hand use the following formulas.

Roof load width formula.

50 psf x 14ft 700 pounds per lineal foot. Roof load width rlw rafter span if placed at midspan otherwise span1 span2. This video looks at roof load width rlw. The formula for truss loads states that the number of truss members plus three must equal the twice the number of nodes.

Rlw is used to calculate the sectional size of some roof members and supporting wall. Roof load area rlw u p span left u p span right or with fan struts. Measure the length and width of the carport to determine the area of the roof in square feet. It is important to list live load dead load and total load separately because live load is used to compute stiffness and total load is used to calculate strength.

Multiply the length by the width to get the measurement for the area. Step 2 determine dead load by identifying the amount of each construction material used in the roof. If the number of members is labeled m and the number of nodes is labeled n this can be written as m 3 2 n. 910 pounds per lineal foot.

15 psf x 14ft 210 pounds per lineal foot. Snow load thickness density the result snow load or the pressure exerted by the snow has the units of kn m or lbs ft.