A double 2x12 beam can span 12 feet.
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.
Refer to the deck beam span table below to assist in determining the maximum span of a given beam between posts.
The recommended span of a given beam is also determined by the dimensions of the timber the species of wood.
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Dimensional lumber deck beam span chart.
2 2x6 2 2x8 2 2x10 2 2x12 3 2x6 3 2x8 3 2x10 3 2x12 3x6 3x8 3x10 3x12 4x6 4x8 4x10 4x12.
Recommended beam joist spans for deck framing loads and deflection.
The numbers in gray indicate the distance between the support posts.
Cut and attach spacers.
Cut pointed spacers from a sheet of 1 2 inch pressure treated plywood the.
A 2 2x10 can span 10 feet and so on.
When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches.
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Obviously the larger the beam the greater the distance it can span between posts.
A redwood 4x6 beam should span no more than 6 between supporting posts.
Some of the most common types of wood used for beams include.
Stack and square deck beams.
Joist span less than or equal to.
The appropriate spans for deck beams and joists are determined in part by the weight loads that.
Southern pine douglas fir douglas fir larch hemlock fir spruce pine fir redwood western cedar ponderosa pine red pine.
How to build a stronger deck beam for a sturdy outdoor space step 1.