Howtoinstall Blocking Between Floor Joists

Tying the joists together with blocking makes the floor even stronger and stiffer.

Howtoinstall blocking between floor joists.

Use metal bridging instead of wood blocking if. Wide flanges provide a larger gluing and nailing surface for floor and roof sheathing. This video shows you the requirements for blocking of deep joist in both natural timber and i beam and lvl joists. On a low deck where blocking cannot be installed from underneath stretch a string from the house to the outside edge along each outside joint for a reference.

So one of the last things that need to be done before sheathing the deck is to fill in with blocking. Yet it is not uncommon to find bridging not properly installed or missing all together. Engineered i joists can span long distances to make a flat and solid subfloor. If necessary mark a square line across the board face to align the sawblade as you cut.

I am using 2x6 walls and 2x8 joists and rafters. Making professional blocks to make the blocks i cut sections of i joist 1 inches smaller than the space between the joists. If a floor displays excessive squeaking i would be asking the builder why he didn t use panel adhesive between the joists and the decking and screws instead of nails. Openings can be strategically cut in the i joist web to allow for wiring ductwork and plumbing.

Floor joist bridging is critical to the structural strength of a floor as shown in figure 1. I don t like cutting my joists short and feel like this system in attached photo has structural issues that i am trying to avoid. A deep joist is classified as one that is. Mark a board at 14 1 2 in.

Cut to the inside of the line. Between 15 and 20 of i joists are now being built with solid lumber flanges. Leave outside joists for last and install blocking from underneath. Is there another way to do blocking between ceiling joists and rafters than in the image attached.

This will leave you with blocking that is 14 7 16 in. Measure the distance between joists and adjust any joists that are more than 1 4 in. One i joist can do the work of two or more solid joists. If the span between the two joists is too narrow to secure the blocking piece rent a pneumatic nailer at a home improvement or tool rental center.

Proper bridging distributes the load on the floor to other joists and over time prevents floors from sagging and squeaking do to floor joists twisting and warping. Blocking is also needed each time the joist overlaps with a center beam and every eight feet between two joists.