Standard Installation^1,2,3

These models are approved for installation with the Strong-Drive SD Structural-Connector screw.

1. Allowable loads are based on a minimum 3" carrying member. For single 2x carrying members, use 10dx1 1/2" nails into the face and 10d commons into the joist, and reduce the allowable load to 0.81 of the tabulated value for 10d nails. Alternatively, use SD #10x1 1/2" into the face and SD #10x2 1/2" into the joist as shown in the table.
2. Uplift loads have been increased for wind or earthquake loading with no further increase allowed. Reduce where other loads govern.
3. Allowable loads in the table are based on a maximum joist slope of 45° (12:12). For slopes greater than 45°, up to 49° (14:12), the allowable loads are 0.85 of the table loads.
4. NAILS: 16d = 0.162" dia. x 3 1/2" long, 10d = 0.148" dia. x 3" long, 10dx1 1/2 = 0.148" dia. x 1 1/2" long.
   See other nail sizes and information.
5. SCREWS: SD #10x2 1/2 (model SD10212) = 0.161" dia. x 2 1/2" long, SD #10x1 1/2 (model SD10112) = 0.161" dia. x 1 1/2" long.

Alternate Installation for Retrofit

1. Allowable loads are based on a minimum 3" thick carrying member.
2. Uplift loads have been increased for wind or earthquake loading with no further increase allowed. Reduce where other loads govern.
3. Fasteners may be angled upward a maximum of 45 degrees.
4. SCREWS: Simpson Strong-Tie SD #10x2 1/2 (model SD10212) = 0.161" dia. x 2 1/2" long.

1. Minimum ridge beam depths shown assume rafter and ridge beam are flush at the top.
2. Minimum ridge beam depths have been determined to ensure the Max. C₁ dimension for the LRU is not exceeded. Deeper ridge beams may be required to support the rafter loads as determined by the Designer.
3. The International Residential Code requires the ridge to be not less in depth than the cut end of the rafter unless the ridge is designed as a beam.