ATS Run Termination Details
Top-Story Termination Types
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.
Bridge Block Connection
The bridge block connection is an acceptable method to terminate the rod-run at the uppermost floor level. Most bridge block heights will allow the installer to tie off the rod run without working from a ladder. There is no need to worry about interference with the roof trusses or having enough room in the roof space to allow for accumulated shrinkage. One 16d toe nail to each jack stud is all that is required to keep the bridge block tight against the jack studs when shrinkage occurs in the members. Do not nail bridge block into full-height studs or sheathing to avoid gaps between the bridge block and jack studs. Check the structural plans for the required fasteners from the jack to the full-height stud below the bridge block.
Top-plate termination can be used where there is no interference with the roof trusses or where there is enough room in the roof space to allow for accumulated shrinkage.
Strap Detail Termination
Straps can be used where loads are lower and framing conditions don’t require a bridge block or top-plate termination.