Dimensional lumber deck beam span chart.
Trex decking span tables.
Build your dream deck with trex the world s best high performance composite decking brand.
Some wood species are stronger than others so refer to the decking span table below before going to the deck joist span table.
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Your selection of decking material will determine the maximum spacing of your joists.
Single trex 1 5 8 joist maximum joist span ledger to box beam 15 0 cm 396 2 trex elevationstm span chart maximum cantilever length 4 0 121 9 50 psf total load 13 0 maximum cantilever length 4 0 maximum joist span ledger to box beam 16 joist spacing o c.
Most composite and pvc decking brands like trex and azek recommend a minimum joist spacing of 16 inches oc.
It s better to build a deck that is strong than bouncy and unstable.
The numbers in gray indicate the distance between the support posts.
Cm cm 121 9cm table e 50 residential single trex 1 5 8 joist table.
A double 2x12 beam can span 12 feet.
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.
Don t be afraid to go to use a shorter span if you are unsure.
Some brands like weardeck let you get away with more reinforced with a layer of fiberglass on both the top and bottom weardeck boards easily allow for spans of 24 inches oc.