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URS: Top-Plate-to-Stud Rotation Restraint

The roof-structure-to-top-plate connection induces eccentric loads to the top plate. This will require a top-plate-to-stud connection to continue the load path and prevent torsional rotation of the top plates. Simpson Strong-Tie offers a variety of product options to resist the rotational forces from the roof structure.

Truss-to-plate connections not shown for clarity. However, they need to be installed on the same side of the wall as plate-to-stud connectors.

Technical Data

  1. N/R – Not required
  2. Where noted in table, when multiple connectors are installed on opposite sides of wall, the top plate shall be loaded concentrically.
  3. For SP2, drive one stud nail at an angle through the stud into the plate to achieve the table load.
  4. Use side (eccentric) load when uplift loads are applied to only one face of the top plate.
  5. Use center (concentric) loads when uplift loads are applied at the center of the top plate, or where equal loads are applied to both sides of the top plate. Center loads may also be used for stud-to-bottom-plate loads.
  6. Maximum load for SPH in Douglas Fir is 1360 lbs. for center loading, and 680 lbs. for side loading.
  7. SPH4 and SPH6 can be installed over nominal 1/2" sheathing with a maximum DF/SP load of 1360 lb. for center loading. Order SPH4R or SPH6R.