Trex Joist Spacing

Trex was the first to invent the wood alternative decking category.
Trex joist spacing. Most deck joists are centered 16 inches apart which is the maximum deck joist spacing for most low maintenance decking. If adding additional framing be sure to keep all boards level and in plane across the tops. Most composite decking materials like trex composite decking require minimum joist spacing for composite decking at 16 on center spacing for straight decking and 12 on center joist spacing for 45 degree angle diagonal decking. For a more rigid feel 12 or less may be preferred.
So when would you ever need to use 12 inches oc. When stacking decking bundles supports dunnage should start approximately 8 in 203 mm from each end and be spaced approximately 2 ft 0 61m on center. On center means that the measurement should be taken from the center of a joist edge to the center of the next joist edge. Before building a composite deck always read the installation instructions from the manufacturer paying special attention to the required joist spacing for composite decking.
If you plan to install your decking at a 45 degree angle your joists may need to be 12 inches apart. Deck joist spacing should never exceed 16 on center with the exception of max deck boards which allow for maximum 24 on center. Store decking on a flat level surface and always use proper supports dunnage. Most composite and pvc decking brands like trex and azek recommend a minimum joist spacing of 16 inches oc.
Trex signature railing and rod rail are made to be installed at maximum 6 or 8 clear span between posts. You also may have to install more stair stringers. Your clients will love its ease and comfort and you ll love its workability unlimited design potential. Those railings are not true 6 72 or 8 96 in length.
Trex pioneered the wood alternative decking industry nearly 20 years ago and we continue to innovate best in class products for high performance low maintenance outdoor living. Do not store directly on the ground. Trex from the inside out. When designing a new trex or composite deck the spacing between floor joists should be 12 inches on center.