Roof Load Beam Span

Window door garage door headers supporting roof loads only.

Roof load beam span.

Fill in the parts of the formula that are already known. 15 psf x 14ft 210 pounds per lineal foot. The total load is 4 000 pounds. The theoretical size of a load bearing beam required to support a particular weight is easy to calculate but the choice of the actual beam depends on taking into account the factors of the particular situation.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Window door garage door headers supporting roof wall floor loads. Standard 2 by 12 beams on 16 inch centers are used to span 15 feet. For the initial calculation f can be estimated at 1 000.

An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry. 910 pounds per lineal foot. 50 psf x 14ft 700 pounds per lineal foot. F stands for the beam s fiber strength in bending which depends on the species of wood.

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. Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications. In the example the beam spans the 10 foot width of the roof.