Code Compliance Joist Spanning for Decking
Adjust Joist Spanning to Accommodate Angled Decking Patterns
Trex ® decking meets all applicable national model building codes. The joists must be spaced on center according to the chart below. Be sure that joists are level and plumb. Trex ® decking must span at least three joists. For heavy items such as hot tubs, planters, etc., consult a local building engineer or inspector for span recommendations. Code Listings Trex ® complies with major model building codes and has been evaluated by the International Code Council evaluation service.
90°
60°
Perpendicular to joists. See chart below.
At a 60° angle, maximum joist spanning is 2 " (51 mm) less than listed in the chart below.
30°
45°
For a Safety Data Sheets (SDS), please visit www.trex.com.
At a 45° angle, maximum joist spanning is 4 " (102 mm) less than listed in the chart below.
At a 30° angle, maximum joist spanning is 1/2 of the distance listed in the chart below.
Trex Signature®, Trex Transcend®, Trex Transcend® Lineage®, Trex Select® and Trex Enhance® Decking Live Load Ratings Trex® decking products have been evaluated by a 3rd-party test lab for two live load ratings: per ASTM D7032 Standard Specification for Establishing Performance Ratings for Wood-Plastic Composite and Plastic Lumber Deck Boards, Stair Treads, Guards and Handrails. The IBC International Building Code and IRC International Residential Code require a 40 psf rating for most walking surface installations. Some commercial installations will require a 100 psf rating or more. It is recom- mended you consult your local building official regarding the requirements in your area. Below are the on- center span requirements to meet the desired rating. For a stiffer installation, a 16" on-center span is recom- mended for the decking surface.
Trex Decking Span Chart
Product
Rating
On-Center Span
16" (406 mm)
Trex Transcend® 2 x 6 and Trex Select® 2 x 6 Products
200 psf
Trex Signature® 1x6, Trex Transcend® 1 x 6 , Trex Transcend® Lineage® 1 x 6, Trex Select® 1 x 6, and Trex Enhance® 1 x 6 Products
16" (406 mm)
100 psf
16" (406 mm)
Trex Transcend® Lineage® 1 x 4 Products
100 psf
24 " (610 mm)
Trex Transcend® 2 x 6 and Trex Select® 2 X 6 Products
100 psf
24 " (610 mm)
Trex Transcend® 1x6 and Trex Transcend® Lineage® 1 X 6 Products
91 psf
24 " (610 mm)
Trex Select® 1 x 6 Products
75 psf
9" (229 mm)
Trex Enhance® 1 x 6 Products
Stair Tread
12" (305 mm)
Trex Transcend® Lineage® 1 x 4 Products
Stair Tread
Trex Signature® 1 x 6, Trex Transcend® 1 x 6, Trex Transcend® Lineage® 1 x 6 and Trex Select® 1 x 6 Products
12" (305 mm)
Stair Tread
16" (406 mm)
Trex Transcend® 2 x 6 and Trex Select® 2 x 6 Products
Stair Tread
22
NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.
Made with FlippingBook interactive PDF creator