Add Bridging Attic Joist

If it is wood it is nailed to the upper top of the side of the floor joist before the floor or sub floor is installed on the joists.

Add bridging attic joist.

The load sharing element is typically considered to be the floor diaphragm. Bridging or x bracing allows joists to share weight. When cross bridging is used wood or metal the upper portion of the bridge is nailed into the top of the floor joist if it is metal. Each piece of bridging requires four nails two at each end.

Then measure the span of the joists the distance between walls or beams that support the joists. You could even possibly introduce a good crown to each by holding the bottom chord in place with a slightly long 2 4 post under the center as you install it. Attach the bridging fasten metal bridging with 1 3 8 in. While such bridging does not affect the strength or structural integrity of a floor system and therefore is not a required component of open joist floor systems it is strongly recommended because of the positive effect it has on comfort factors perceived by individuals on a floor system.

Cut and install lumber blocking or bridging between the joists if required by local code. What i would do is to add a 2 4 to the top and bottom of each joist using glue and structural screws to convert each joist into an i joist in place piffin writes. Start by making sure the original bridging is tightly fastened. If you choose this approach buy lumber the same thickness and depth as the joists and cut it into sections that fit.

Add nails or screws if necessary. However some people add additional bridging to try and stiffen the floor and provide additional load sharing or to brace the joists per nds 4 4 1. Put 2x8 blocks at the third points set at the midheight of the assembly and bridging the horizontal joint between top and bottom joists. Divide the span by three and add rows of bridging at both of the one third points.

Hewitt said solid bridging is usually simpler to add once flooring is in place. Toenail the blocks or end nail through the joists to tie everything together.