![]() ![]() Most composite and plastic decking manufacturers recommend a maximum joist spacing of 16” O.C. How Far Apart Should My Joists Be for Composite Decking? If you select a decking that can span further distances then you will save money on material and labor for your understructure. ![]() The decking you select impacts the necessary spacing of your joists. If a builder installs deck joists too far apart, the decking will sag. Why does joist spacing matter? The durability of a deck or dock relies on the strength and success of its framework- joists included. They allow for the creation of a fully synthetic deck or dock with WearDeck 2×8” or 2×10” boards as understructure and WearDeck 5/4×6” or 5/4×8” boards as decking and railing. However, WearDeck offers plastic lumber in 2×8” and 2×10” profiles rated for use as joists. Joists often consist of wood or steel, because composite and plastic boards usually lack the strength needed to support the weight of decking. If you draw a line down the center of two joists and measure the distance between them as 24 inches, then the joist spacing is 24” O.C. Joist spacing refers to the distance between joists and is measured in inches on center (O.C.). Joists must supply the strength necessary to hold up the decking that rests on them. As the horizontal members that run the length of the project, joists support the decking itself. Joists play a vital part in the framework of a deck or dock. Read on to find out more about joist spacing for composite and plastic decking. We also cover joist spacing for plastic deck boards like WearDeck. What is the proper joist spacing for composite decking? In this blog post, we explore joist spacing and the necessary considerations before installing composite decking. ![]()
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