Page 138 of Wood Construction Connectors 2006 Catalog by Simpson Strong-Tie

Installation Method 1 Top Chord Installation Method 2 Vertical Web TWO-PLY 4X2 FLOOR TRUSSES For more information, request T-SDSCREWAPPS. The use of Strong-Drive screws insures that loads are adequately supported by both trusses. (Testing has shown that most currently available light gauge steel connectors do not uniformly distribute applied loads to both trusses.) In addition differential deflection between the two trusses is reduced. 1. Screw spacing shall not exceed 24" o.c. and shall not be less than 4" o.c. A minimum end distance of 3" shall be provided at all truss members. 2. Gap between the trusses shall not exceed 1/8". 3. Floor sheathing shall be screwed (or nailed) to each truss top chord. (Fastener spacing per the applicable Code requirements, or 12" o.c. max.) 4. Strong-Drive screws shall be installed with the screw heads in the loaded truss. If the screws are installed in the wrong truss face, install additional screws in the correct face with a maximum spacing of 2x the required spacing, not to exceed 24" o.c. Offset the additional screws from the existing screws to prevent splitting. 5. Strong-Drive screws are permitted to be installed through metal truss plates as approved by the Truss Designer, provided the requirements of ANSI/TPI 1-2002 Section 8.10 are met (pre-drilling required). 6. The Truss Designer shall ensure that each truss is designed for the appropriate load(s) considering the location of the applied load(s) and the location of the Strong-Drive screws. 7. The Truss Designer shall design all trusses and the truss system to meet all Code and ANSI-TPI requirements. 8. Individual screw locations may be adjusted up to 3" to avoid conflicts with other hardware or to avoid lumber defects. 9. Strong-Drive screws shall not be installed in areas where lumber wane exceeds ". 10. All concentrated loads were assumed to be applied at truss panel points. Allowable Shear Loads Floor (100) Floor (100) SDS x6 200 240 DFL SP (G 0.50 min) SPF (G 0.42) Model No. 1. Allowable loads are based on testing per ASTM D1761. No further increase allowed. 2. Method 1 To be considered effective all Strong-Drive screws shall be installed within 12" of the applied concentrated load. 3. Method 1 and Method 2 screws can be combined as required to transfer half of the applied load to the supporting truss. 4. For uniform top chord loads, space Strong-Drive screws as required to transfer half of the applied load to the supporting truss. 5. Web configurations other than those shown above may be used as allowed by the Truss Designer. Screw position in the truss Block(s) should be of similar size/grade as the truss member to which it is attached. Blocking should be designed to act as one unit with the truss members. Block(s) should be of sufficient size to accept all carried/carrying member nails, and develop full seat bearing as specified in Simpson Strong-Tie publications. Truss Designer is to confirm blocking size/grade, fasteners required and application. Fasteners used to attach the additional blocking should be independent of the truss hanger fasteners. Use of Wood Blocking to Achieve the Full Design Load Value of a Face Mount Hanger Attached to a Single Ply Carrying (Girder) Member.(Block designed by Engineer of Record or Truss Designer) Connection Design to Achieve Specified Nailing of a Face Mount Hanger at a Panel Point. Use of Wood Filler Blocking for Carried Member Width Less than Hanger Width. (Block designed by Designer or Truss Designer) Example shown: HGUS210-2 installed on a 2x6 bottom chord (other applications similar) Example shown: THGBH4 installed Nails located in joints formed by the intersection of wood members have no load resistance. The hanger allowable load value shall be reduced by the nail shear value for each header nail less than the specified quantity. Connection shall be approved by the Truss Designer. 1 2 3 MULTI-PLY WOOD TRUSS APPLICATIONS 139 Plated Truss Connectors ALTERNATE INSTALLATIONS

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