A wood beam span table is a chart used to identify the right wood beam size for construction. The size is calculated in relation to the necessary beam length and spacing.
Wood beams are commonly used to build floors and roof supports. The correct length, width and strength of wood must be used depending on its purpose. Calculating the right size can be complicated, so using a span chart is preferable.
SouthernPines.com provides span tables for Southern Pine lumber. AWC.org provides a detailed explanation of how to use a wood beam span table. Most lumber yards provide span tables upon request.