Strong-Drive® SDWS TIMBER Screw (Interior Grade) 

SDWS Log — Allowable Shear Loads — Douglas Fir–Larch and Southern Pine

SDWS Log — Allowable Shear Loads — Spruce-Pine-Fir and Hem-Fir

1. Design values are based on full fastener embedment and the adjacent members are in contact with each other.
2. Allowable loads are shown at the wood load duration factor of C_D = 1.0. Loads may be increased for load duration up to a C_D = 1.6.
3. Tabulated values must be multiplied by all applicable adjustment factors per the NDS.
4. Minimum fastener spacing requirements: 6" end distance, 1 7/16" edge distance, 5/8" between staggered rows of fasteners, 4" between non-staggered rows of fasteners and 8" between fasteners in a row.
5. Loads are for in-service moisture content less than or equal to 19% (C_M=1.0).
6. Loads are based on installation into the side grain of the wood member with the screw axis perpendicular to the face of the wood member.

SDWS Log — Allowable Withdrawal Loads — Douglas Fir–Larch, Southern Pine, Spruce-Pine-Fir and Hem-Fir Lumber

1. The tabulated reference withdrawal design value, W, is in pounds per inch of the thread penetration into the side grain of the main member.
2. The tabulated reference withdrawal design value, W_max, is in pounds where the entire thread must penetrate into the side grain of the main member.
3. Tabulated reference withdrawal design values (C_D=1.0), W and W_max, must be multiplied by all applicable adjustment factors from the NDS as referenced in the IBC or IRC.
4. Embedded thread length is that portion held in the main member including the screw point.
5. Values are based on the lesser of withdrawal from the main member or pull-through of a 1.5" side member.
6. Loads are for in-service moisture content less than or equal to 19% (C_M=1.0).

Wood Species Combinations in the Specific Gravity Range 0.35 to 0.41

Allowable Loads for Strong-Drive SDWS LOG Screws with Expanded Specific Gravity Options

Allowable load tables on the following pages provide shear and withdrawal capacities for wood species with an assigned specific gravity of 0.35 to 0.41. Wood species with a specific gravity within this range are provided below.

1. Specific gravity as assigned in NDS-18 Table 12.3.3A.

SDWS Log — Allowable Lateral Loads in the Specific Gravity Range 0.35 to 0.41

1. Design values are based on full fastener embedment and the adjacent members are in contact with each other.
2. Allowable loads are shown at the wood load duration factor of C_D = 1.0. Loads may be increased for load duration per the building code up to a C_D = 1.6. Tabulated values must be multiplied by all applicable adjustment factors per the NDS.
3. Minimum fastener spacing requirements: 6" end distance, 1 7/16" edge distance, 5/8" between staggered rows of fasteners, 4" between non-staggered rows of fasteners and 8" between fasteners in a row.
4. For in-service moisture content less than or equal to 19% (C_M=1.0).
5. The load tables are based on testing in accordance with ICC-ES AC233, with an applied factor of safety of 5.0.

SDWS Log — Allowable Withdrawal Loads in the Specific Gravity Range 0.35 to 0.41

1. The tabulated reference withdrawal design value, W, is in pounds per inch of the thread penetration into the side grain of the main member.
2. The tabulated reference withdrawal design value, W_max, is in pounds where the entire thread must penetrate into the side grain of the main member.
3. Tabulated reference withdrawal design values, W and W_max, are shown at the wood load duration factor of C_D = 1.0. Loads may be increased for load duration per the building code up to a C_D = 1.6. Tabulated values must be multiplied by all applicable adjustment factors per the NDS as referenced in the IBC or IRC.
4. Embedded thread length is that portion held in the main member including the screw point.
5. Values are based on the lesser of withdrawal from the main member or pull-through of a 1.5" side member.
6. For in-service moisture content less than or equal to 19% (C_M=1.0).
7. The load tables are based on testing in accordance with ICC-ES AC233, with an applied factor of safety of 5.0.

Code Reports & Compliance

Drawings