![]() ![]() Installing joists block the same size as the joists allows you to use up scraps from the joists and cut up and install warped or twisted joists. Joist blocking is often the same size as the joists, but this is not required. I prefer criss-cross as nailing is easier, but a straight line may look better from underneath the deck with a higher deck. They are fastened securely to the joists in either a “step/criss-cross” fashion or in a straight line. What Is Joist Blocking?Ī joist block is a piece of wood that sits perpendicular to the joists on your deck. Moreover, even when installed correctly, using galvanized hangers, nailed to the beam and rim joists, they are still prone to sway and wobble. “Įven though most joists are pressure-treated 2X6, 2X8, or 2X10s (this will depend on the size of your deck), they are not impervious to forces like gravity or weight. “Joists blocking make your joists work together as a team. In simpler terms, they prevent the joists from wobbling to and fro due to pressure from the deck flooring or movement from individuals on the deck. The primary purpose of blocking between deck joists is to create stability and support for each joist so that they remain sturdy and rigid under the weight of the floor. What Is The Purpose Of Blocking Between Deck Joists?
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