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Floor Load Determination
All structures must comply with local and national building requirements. The following recom-
mended measurements represent maximum spans for decking oor joints (shown in feet and
inches), assuming the following:
• Modulus > 0.9 MM psi (represents the majority of wood species
• Static Load < 10psf (standard for decking design)
• Moisture Load < 19.0% (standard for pressure treated wood)
• Deection = L/360 (standard for building codes)
NOTE These specications are subject to change without notice and are for refer-
ence only.
100 pounds/sq. foot live load
Joint Size
(inches)
Joint Spac-
ing (inches
on center)
Wood Grade
Select Struc-
tural
No. 1 No. 2 No. 3
2 x 6
12 7-11 7-9 7-6 6-3
16 7-2 7-1 6-6 5-5
24 6-4 6-1 5-3 4-5
2 x 8
12 10-5 10-3 9-8 8-0
16 9-6 9-4 8-4 6-11
24 8-4 7-8 6-10 5-8
2 x 10
12 13-4 12-10 12-6 9-5
16 12-1 11-1 10-10 8-2
24 10-4 9-1 8-10 6-8
2 x 12
12 16-3 15-4 14-8 11-3
16 14-9 13-3 12-8 9-9
24 10-4 10-4 10-4 8-0
Floor Load Determination
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