Three top-story run termination options are provided to tailor the solution to the project's specific needs. The option chosen will depend on construction preference or structure conditions, such as sloped top plates, truss/rafter locations that may conflict with top-plate termination and available space above top plates for the take-up device assembly. The bridge block or strap termination are often necessary or preferred when the run stops below the top plate.
With the design support services we offer, Simpson Strong-Tie will also verify each specified run application and recommend the best termination method for the given project. Consider these variables when specifying run terminations.
The bridge block connection is an alternative to terminating the rod-run on the uppermost floor top plate. The bridge block detail accommodates high loads with installation from the inside of the structure. The bridge block allows the installer to tie off the rod run without working from a ladder. There is no need to worry about having enough room in the roof space to allow for accumulated shrinkage. The bridge block should not be nailed to the full-height studs or the sheathing. One 16d toe nail to each jack stud is all that is required. Check the structural plans for the required fasteners from the jack to the full-height stud below the bridge block.
The traditional termination is at the top plate where there is enough roof space and the loads are not high enough to require a bridge block termination.
Straps can be used where loads are lower and framing conditions don't require a bridge block or top-plate termination.