Page 139 of Wood Construction Connectors 2006 Catalog by Simpson Strong-Tie

Screw position in the truss Truss Chord 1. Allowable loads are based on testing per ASTM D1761. 2. The Truss Designer shall apply all adjustment factors required per 2001 NDS. 3. Loads are based on 1 thick wood side members and apply to 3 and 4 ply 2x wood truss applications. (Side and main members of same wood species.) Contact Simpson for other applications. Simpson Strong-Drive Screw U.S. Patent 6,109,850 Other Patents Pending GIRDER TRUSSES For more information, request T-SDSCREWAPPS. 1. Install Strong-Drive screws a minimum of 1 inch into the last truss ply, with a maximum gap of allowed between each truss ply. 2. Screw spacing shall not exceed 24" o.c. 3. Hanger load spacing on the multi-ply truss shall not exceed 24" o.c. 4. The Truss Designer shall ensure that adequate lateral bracing is provided to prevent displacement of the truss and the truss bottom chord due to the torsion created by the structural members framing into the side of the multi-ply girder truss. 5. If Strong-Drive Screws are installed in the wrong truss face, install additional screws in the correct face with maximum spacing of 2x the required spacing, not to exceed 24" o.c. Offset the additional screws from the existing screws to prevent splitting. 6. Do not install Strong-Drive Screws through metal truss plates unless approved by the Truss Designer pre-drilling is required. 7. The Truss Designer shall ensure that the use of Strong-Drive Screws for joining multi-ply trusses is allowed by the Building Official before the truss design is completed. 8. Use 1 row of SDSs in 2x4 members, 2 rows in 2x6 and 2x8 members, 3 rows in 2x10 members. Rows should be staggered. 9. Individual screw locations may be adjusted up to of the required screw spacing to avoid conflicts with other hardware or to avoid lumber defects. Strong-Drive Screw Model No. Allowable Shear Loads Doug-Fir Larch (G 0.50) Southern Pine (G 0.55) Spruce-Pine-Fir (G 0.42) Floor (100) Snow (115) Roof (125) Floor (100) Snow (115) Roof (125) Floor (100) Snow (115) Roof (125) SDS x4 260 300 325 260 300 325 220 245 270 SDS x6 260 300 325 260 300 325 220 245 270 140 Plated Truss Connectors MULTI-PLY WOOD TRUSS APPLICATIONS TSB Truss Spacer Bracer The TSB2 is an innovative product that meets or exceeds current lateral bracing methods. FEATURES: This is the only product of its type that captures the on-center spacing of the trusses, allowing quicker installation. Resists tension and compression loads equal to or greater than BCSI 1-03 prescriptive requirements. Does not require any field modification prior to installation. Can be used as Permanent Lateral Bracing and as Temporary Erection Bracing. Has a low profile that can be sheathed over when used as erection bracing, eliminating the need to remove bracing prior to sheathing. The TSB2 allowable loads are working loads with a reduction factor of 3 applied. The Designer or Engineer of Record does not have to apply reduction factors. MATERIAL: 22 gauge. FINISH: Galvanized INSTALLATION: Use all specified fasteners; see General Notes. CODES: See page 12 for Code Listing Key Chart. TSB2-24 U.S. Patent Pending Model No. Maximum Allowable Loads 1 Fasteners L Tension Compression TSB2-24 TSB2-16 540 4-10dx1 25 17 365 540 4-10dx1 365 Code Ref. 47, 134 Typical TSB2-24 Installation on 2x Wood Truss 1. No load duration increase allowed. 2. NAILS: 10dx1 0.148" dia. x 1 long. See page 16-17 for other nail sizes and information.

[close]