METAL FRAMING REQUIREMENTS AND GAPPING
Gap decking end-to-end 3 mm (>4.5°C) 5 mm (<4.5°C)
Two screws per joist
Gap decking width-to-width 5 mm
Double joist spacing per manufacturers requiremenrs requirements
19 mm
Adjust end span framing per manufacturers requirments requirements
Perimeter joists
NOTES: » Gapping rules are required when installing Trex decking. » When using an aluminum framing system or other type of metal for sleeper systems, follow manufacturer's instructions for proper installation. » Depending on loading requirements and/or if installing Trex decking on an angle, framing spacing may need to be adjusted. See page 8 for Trex requirements . » Depending on type of structure being used, different types of fasteners must be used for attachment. Refer to the chart located under Recommended Fasteners (page 9) compatible fasteners based on substrate material being used. » When using screws to attach decking to framing, use two screws per every joist.
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