Recommended beam joist spans for deck framing loads and deflection.
Wood deck beams.
Southern pine redwood cedar hemlock fir red pine and combination woods such as douglas fir western larch douglas fir larch hemlock fir hem fir and.
Stack the three 2x10 beam members on top of each other with their crowns facing the.
A redwood 4x6 beam should span no more than 6 between supporting posts.
The appropriate spans for deck beams and joists are determined in part by the weight loads that.
The recommended span of a given beam is also determined by the dimensions of the timber the species of wood.
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Refer to the deck beam span table below to assist in determining the maximum span of a given beam between posts.
Cut and attach spacers.
Joist span less than or equal to.
2 2x6 2 2x8 2 2x10 2 2x12 3 2x6 3 2x8 3 2x10 3 2x12 3x6 3x8 3x10 3x12 4x6 4x8 4x10 4x12.
Composite decking by color.
The numbers in gray indicate the distance between the support posts.
Southern pine douglas fir douglas fir larch hemlock fir spruce pine fir redwood western cedar ponderosa pine red pine.
Choose from a range of colors and deck board sizes from top brands.
Cut pointed spacers from a sheet of 1 2 inch pressure treated plywood the.
A double 2x12 beam can span 12 feet.
Obviously the larger the beam the greater the distance it can span between posts.
A 2 2x10 can span 10 feet and so on.
Custom composite decking boards.
Some of the most common types of wood used for beams include.
Stack and square deck beams.