Roof Load Width Formula

This is the sixth video in the series on the timber framing code.

Roof load width formula.

Rlw is used to calculate the sectional size of some roof members and supporting wall. Measure the length and width of the carport to determine the area of the roof in square feet. 910 pounds per lineal foot. You can also find the load per square meter or square foot of roofing by opening the advanced mode.

This video looks at roof load width rlw. 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. Snow load thickness density the result snow load or the pressure exerted by the snow has the units of kn m or lbs ft.

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. 15 psf x 14ft 210 pounds per lineal foot. If you want to calculate these values by hand use the following formulas. The formula for truss loads states that the number of truss members plus three must equal the twice the number of nodes.

Roof load width rlw rafter span if placed at midspan otherwise span1 span2. Both sides of the equation should be equal in order to end up with a stable and secure roof structure.