How To Install Cross Bracing In Floor Joists

Bridging or x bracing allows joists to share weight.

How to install cross bracing in floor joists. To install the type shown here drive the toothed end into the joist and nail the other end. Joists can be strengthened by installing diagonal cross bracing using one by four lumber or metal strips. 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. Bracing will stiffen a floor system prevent floor joists from twisting and increase overall stability however there are actually two types of floor joist bracing commonly used.

Mike installs galvanized steel briding in between the floor joists on this bedroom addition project in rocky hill ct. As a footstep falls on one joist some of the force is transferred to neighboring joists. On top of the floor joists is the subfloor which is typically a sheer or sheets of plywood. Remove the crawl space cover at the outside of the foundation to access the underside of the floor joists for a first floor room.

Cross bracing or bridging is another system that reinforces a structure of a building just like blocking does. Cross bracing and solid blocking. Adding two rows of bridging costs a few dollars per joist. When you reach the underside of the floor you will be able to see several things.

You can use cross bracing instead. Various types of metal bridging are available at home centers and lumberyards. Bridging is removed to allow for the installation of duct work as shown in figure 3 dryer vent pipes plumbing drains water pipes and. From both ends of the span.

Installing solid blocking between the joists is the most effective method to lessen or. Figure 2 incorrect installation of cross bridging. Even if your joists already have a row of bridging at the center of the span adding a row on each side of the existing bridging will stiffen the floor. On top of that will be your main floor.

Step 2 sagging floor joists. Whether your home is new or old it is sometimes necessary to install floor joist bracing in order to eliminate squeaking and deflection in the flooring itself. The joists shown here for example span 12 ft so we added rows of bridging 4 ft.