Roof Framing or Truss-to-Top-Plate Restraint
Uplift refers to the forces that can lift a structure. The forces are generated when high winds blow over the top of the structure, creating suction that can lift the roof. These uplift forces must be transferred down to the foundation to prevent damage. Several connections are required to create a continuous load path, starting with a hurricane tie or structural fastener connecting the roof framing to the top plates.
For additional information, the Simpson Strong-Tie High Wind Guide (F-C-HWG) offers a variety of options to resist roof uplift forces.
|AC391 Criteria Section||AC391 Requirement|