Cross Support For Floor Joist

The layout term for joists is on center which is the center to center measurement from one joist to the next.

Cross support for floor joist.

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. Most decks use 16 on center spacing for joists. You can use cross bracing instead. It should be placed at eight foot intervals between any floor joists 2x10 or longer.

Cross bracing or bridging is another system that reinforces a structure of a building just like blocking does. A joist support is the horizontal beam that supports the floor joists. Most decking is not strong enough to support longer spans than 16. In some cases additional joist supports will have to be installed before there can be extra heavy objects on the floor.

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. The joist support helps reinforce the floor so it can handle the weight load it needs to. 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. 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.