Cross Support For Floor Joist

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.

Cross support for floor joist.

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. You can use cross bracing instead.

Most decks use 16 on center spacing for joists. 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. 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. 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. Solid blocking should be used where floor joists overlap over beams. 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.