Cross Support For Floor Joist

Most decking is not strong enough to support longer spans than 16.

Cross support for floor joist. You can use cross bracing instead. Most decks use 16 on center spacing for joists. The bigger you make your deck the more you ask of the framing timbers that hold up the deck s structure and the joists and beams that support the. The layout term for joists is on center which is the center to center measurement from one joist to the next.

Providing more support and rigidity than cross bracing solid blocking is a reasonable alternative but can be an obstacle for running plumbing pipes and electrical wire between floor joists. Although not as good as solid or cross bridging a 2 x 4 supporting the duct work as shown in figure 4 would provide more support and load sharing than a light piece of metal. In some cases additional joist supports will have to be installed before there can be extra heavy objects on the floor. Solid blocking should be used where floor joists overlap over beams.

The joist support helps reinforce the floor so it can handle the weight load it needs to. The difference is that the cross bracing uses two pieces of support in a diagonal shape that creates an x between the joists instead of a solid block in blocking. Figure 4 2 x 4 installed below duct work table 1 provides the correct quantity of bridging relative to the span of the floor joist. A joist support is the horizontal beam that supports the floor joists.