HTT Heavy Tension Tie
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The HTT is a high-strength solution for resisting tension loads in post-pour, wood-to-concrete connections. This heavy, single-piece formed tension tie is fastened with nails or Strong-Drive® SD Connector screws. The HTT has a four-ply formed seat and a design without rivets that does not require washers.
- Optimized nailing pattern for better performance and less deflection
- Ideal for retrofit or new construction projects
- HTT5KT holdown is sold as a kit with the bearing plate, washer and Strong-Drive SD Connector screws
- See table
- Galvanized. May be ordered HDG.
- See Holdown and Tension Tie General Notes.
- For information about marriage strap at panelized roof applications, see MSTD.
- HTT5KT requires BP 5/8-2 bearing plate and #10 x 2 1/2" SD Strong-Drive Connector screws (included in kit).
- The HTT4 and HTT5 feature an optimized nailing pattern which results in better performance with less deflection.
- The HTT5-3/4 is designed to use a 3/4"-diameter anchor bolt.
- When using with unreinforced concrete masonry, 3/4" post-installed anchor bolts are commonly used.
- When installing over wood structural panel sheathing, use a 2 1/2"-long fastener minimum.
Many of these products are approved for installation with Strong-Drive® SD Connector screws.
- Allowable load for HTT5 with a BP 5/ 8-2 bearing-plate washer installed in the seat of the holdown is 5,295 lb. for DF/SP and 4,555 lb. for SPF/HF.
- Fasteners: Nail dimensions in the table are listed diameter by length. SD screws are Simpson Strong-Tie® Strong-Drive SD Connector screws. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.
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