How To Install Cross Bracing In Floor Joists

Step 2 sagging floor joists.

How to install cross bracing in floor joists.

Cross bracing and solid blocking. When you reach the underside of the floor you will be able to see several things. 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. The joists shown here for example span 12 ft so we added rows of bridging 4 ft.

You can use cross bracing instead. Cross bracing or bridging is another system that reinforces a structure of a building just like blocking does. 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. Bridging or x bracing allows joists to share weight.

To install the type shown here drive the toothed end into the joist and nail the other end. Installing solid blocking between the joists is the most effective method to lessen or. Joists can be strengthened by installing diagonal cross bracing using one by four lumber or metal strips. Put on work gloves safety glasses and a dust mask.

As a footstep falls on one joist some of the force is transferred to neighboring joists. Remove the crawl space cover at the outside of the foundation to access the underside of the floor joists for a first floor room. On top of the floor joists is the subfloor which is typically a sheer or sheets of plywood. From both ends of the span.

Figure 2 incorrect installation of cross bridging. You will have the floor joists which cross one another to form a grid. As shown in figure 2 it is not unusual especially in new homes to find that the cross bridging has not been nailed to the bottom of the 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.

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. Bridging is removed to allow for the installation of duct work as shown in figure 3 dryer vent pipes plumbing drains water pipes and. Mike installs galvanized steel briding in between the floor joists on this bedroom addition project in rocky hill ct.