6x6 Beam Span Chart
Douglas fir is one of the most widely used and strongest wood species commonly used for six by six lumber sometimes marketed as hem fir or fir larch because of its close association with hemlock and larch spruce runs a close second with respect to wood strength.
6x6 beam span chart. Lumber species southern pine douglas fir douglas fir larch hemlock fir spruce pine fir redwood western cedar ponderosa pine red pine. The numbers in gray indicate the distance between the support posts. Obviously the larger the beam the greater the distance it can span between posts.
Refer to the deck beam span table below to assist in determining the maximum span of a given beam between posts. A redwood 4x6 beam should span no more than 6 between supporting posts. Numbers in blue are joist spans beam to beam or house to beam.
Repetitive member fb design values are used in design when three or more load sharing members such as joists rafters or studs are spaced no more than 24 apart and are joined by floor ing sheathing or other load distributing elements. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Beam span calculator for help simply click on the beside the section you need help with watch this tutorial video.
Dimensional lumber deck beam span chart. A 2 2x10 can span 10 feet and so on. Beam may be solely responsible for carrying a specific design load.