Roof Load Width Formula

Roof load area rlw u p span left u p span right or with fan struts.

Roof load width formula.

910 pounds per lineal foot. The formula for truss loads states that the number of truss members plus three must equal the twice the number of nodes. Both sides of the equation should be equal in order to end up with a stable and secure roof structure. Step 2 determine dead load by identifying the amount of each construction material used in the roof.

Multiply the length by the width to get the measurement for the area. 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. You can also find the load per square meter or square foot of roofing by opening the advanced mode.

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. 50 psf x 14ft 700 pounds per lineal foot. This is the sixth video in the series on the timber framing code. This video looks at roof load width rlw.

Rlw is used to calculate the sectional size of some roof members and supporting wall. 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.