Multi-Ply Wood Trusses Applications: Strong-Drive® Screws (SDS) For Two-Ply 4X2 Parallel Chord Trusses
Thank you for choosing Simpson Strong-Tie for your uplift connectors!
Steps to Choose an Uplift Connector
- Determine roof uplift capacity required.
- Determine species of wood being connected.
- Enter table below and choose connector.
- Determine if lateral loads are required in addition to uplift loads. If so, lateral loads are listed here. See below for reducing capacity for loading in multiple directions.
- Install connectors using number and size of fasteners shown in this table.
- For more options for selection of connectors, see here.
- Install additional connectors to provide a continuous load path to the foundation. See here for more information on the continuous load path.
|Selecting Connectors For Roof-to-Wall Connection|
|Lumber Species||Uplift Required||Connector|
|Both members Southern Pine or Douglas Fir-Larch lumber||480 or less||H2.5A|
|481 - 745||H8|
|746 - 1000||MTS12|
|One or both members Spruce-Pine-Fir or Hem-Fir Lumber||480 or less||H2.5A|
|481 - 565||H8|
|566 - 860||MTS12|
|861 - 1015||H10A|
|1016 - 1245||HTS20|
- Allowable loads are based on a CD = 1.00. Increases are allowed for other durations per code to a maximum CD = 1.60.
- Method 1 - To be considered effective all Strong-Drive screws shall be installed within 12" of the applied concentrated load.
- Method 1 and Method 2 screws can be combined as required to transfer half of the applied load to the supporting truss.
- For uniform top chord loads, space Strong-Drive screws as required to transfer half of the applied load to the supporting truss.
- Web configurations other than those shown above may be used as allowed by the Truss Designer.