Floor Joist Strapping Requirements

I see rim joists.

Floor joist strapping requirements. Additional support for the floor joists is achieved by nailing the ends of the joists into headers. 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. Properly installed wood x bridging tightens as the joists shrink to the degree that i ve seen the bottom of the joists get a slight crook in them from the bridging. Blocking shall also be located at the termination of all straps.

Otherwise you are right the joists rim are toe nailed to the sill plate. Section r502 10 of the international residential code states that header joists can be the same size as the floor joists when the header joist span isn t greater than 4 feet but if the header joist span is more than 4 feet you ll need to double the header joist and ensure that it s capable of. Joist span and spacing is set by your local building code. Constructed with adequate floor and roof diaphragms and shear walls.

The joists immediately under the load deflect substantially before the straps are tensioned and start spreading weight to other 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. Many of the requirements in prescriptive codes and standards are intended to ensure that buildings are. Cross bracing and solid blocking.

16 inch on center spacing allows the drywall to be fastened four times across its width one on each end and two in the middle. Blocking in accordance with figure r505 3 3 2 1 or r505 3 3 2 2 shall be installed between joists at each end of the continuous strapping and at a maximum spacing of 12 feet 3658 mm measured along the continuous strapping perpendicular to the joist run. Same stuff i found. Look at page 4 for typical rim boards.

Ceiling strapping should be installed every 16 inches on center perpendicular to the joists above. Kind of defeats the purpose. Appearantly no requirements for strapping to sill plates. You should check with your local building department for construction requirements in your area.

Be supported on noggings and extend over at least three joists be fixed with two screws or nails into each 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. 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. Specifically the ibc irc wfcm and icc 600 provide prescriptive shear wall details and designs that may be applied when certain basic conditions are met.

Remember a sheet of drywall is 4 feet or 48 inches wide.