Code Compliance
Adjust Joist Spanning to Accommodate Angled Decking Patterns
Joist Spanning for Decking 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 Decking Span Chart (on center) Residential Decks, Light Duty Docks, Residential/Day Care Playground
Commercial Decks, Boardwalks and Marinas
Decking Loading
100 psf = 4.8 kN/m2
100 psf = 4.8 kN/m2 200 psf = 9.5 kN/m2
1" (25 mm) Boards, and .875" (22 mm) Select Boards
16 " (406 mm)
12 " (305 mm)
16" (406 mm)
2 x 6 (51 mm x 152 mm) Boards
24 " (610 mm)
24 " (610 mm)
16 " (406 mm)
Trex Railing Span Chart See Code Reports and Instructions for Allowable Spans for Railing Applications
Canada Requirements For Trex Transcend and Trex Select Decking: The following changes are to be followed with respect to spans and gapping instructions; these spans are specific for CCMC requirements only.
Canada Allowable Joist and Stair Stringer Spacing
Maximum Allowable Joist Spacing
Maximum Allowable Stair Stringer Spacing
Product
21mm x 140mm Select Decking
400 mm
200 mm 230 mm 250 mm 250 mm
24mm x 140mm Transcend Decking
400 mm
33mm x 140mm Select Decking
600 mm 600 mm
33mm x 140mm Transcend Decking
Canada Gapping Requirements
Temperature at Time of Installation
Minimum Gap Requirement (mm)
Gap Type
Width to Width Gap
Above -9 °C Above 15°C
5 4 6 8 6
End to End End to End End to End
Between 3°C to 15°C Between -9°C to 3°C
End to Solid Object End to Solid Object
Above 3°C
Between -9°C to 3°C
13
20
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