Floor Joist Blocking Installation

Install temporary bracing or temporary sheathing to prevent i joist from rolling over or buckling.

Floor joist blocking installation.

To install align the block to the marks and through screw or nail one end. I needed some blocking or this wall was not going up. After several centuries of service floor joists in older homes may sag or crack. Remove any screws or fasteners that may be protruding from the surface of the joist.

Once the structure is completed the floor sheathing provides lateral support for the top flanges of the i joist. Walking on joists before all accessories and floor decking are installed i joists are unstable and can roll over if walked on leading to injuries. Long spans of joists in newer homes may wobble or bounce from foot traffic. So one of the last things that need to be done before sheathing the deck is to fill in with blocking.

Skipping the installation of blocking on floor joists can be tempting as the process is somewhat labor intensive. Properly install all blocking hangers rim boards and rim joists at tji joist end supports. However blocking can provide both rigidity and stability to a frame and depending on the size of the joists may even be required by code. Tying the joists together with blocking makes the floor even stronger and stiffer.

Look for high low uneven joists using a tight string line. Use a water management system such as a drip cap or flashing wherever framing meets the home to move moisture away from the home and deck. Straight line blocking gives the neatest appearance but is the most difficult to install. Making professional blocks to make the blocks i cut sections of i joist 1 inches smaller than the space between the joists.

For this situation the blocking needs to be installed in line to allow the end of the sistered joist to rest on the beam top. Blocking is required at interior support when i joists are applied continuously over interior supports. Don t allow your crew to walk on i joists or install subfloor sheathing until all hangers blocking panels and temporary safety bracing strapping are fully installed. The plan for this deck called for more joists to be sistered on at the beam.

Joists must be level and in plane for a flat surface. Engineered i joists can span long distances to make a flat and solid subfloor. Establish a permanent deck sheathing fastened to the first 4 feet of joists at the end of the bay or braced end wall. This provides a symmetrical pattern while also making installation simpler since fasteners can be driven into the end of each block through the joists rather than toe nailing.

Blocking for wall framing are short pieces of 2 by 4 that you install between two joists of the basement ceiling.