HTT/HTTH™ Heavy Tension Tie
Tension Ties
This product's information may differ depending on the category of use. You are currently viewing details related to Tension Ties. You can also view product information related to the category: Holdowns and Tension Ties for Cold-Formed Steel Construction
Product Details
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.
The HTTH6.5 heavy tension tie is an ideal solution for residential construction as well as light-framed wood commercial buildings. Tested per AC 155, the HTTH6.5 is the first nailed-on holdown to achieve up to 7,650 lb. allowable load, making it an economical solution when heavier loads are required.
Key Features
- 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
- Four-fold seat to reduce deflection
Material
- HTT: 11 gauge; HTTH6.5: 10 gauge
Finish
- Galvanized. May be ordered HDG.
Installation
- 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.
- The HTTH6.5 requires one standard 3/4" cut washer (not included).
- The HTTH6.5 is engineered with a 0.185" fastener hole diameter, making it compatible with both nails in standard pneumatic nail gun sizes and SD Connector screws.
Related Literature
Product Information Table
| Model No. | Ga. | W (in.) | L (in.) | CL (in.) | SO (in.) | Coating/Material | Product Includes | Packaging Qty. |
|---|---|---|---|---|---|---|---|---|
| HTT4 | 11 | 2 1/2 | 12 3/8 | 1 5/16 | 7/16 | Zinc Galvanized, G90 | - | 1 |
| HTT4HDG | 11 | 2 1/2 | 12 3/8 | 1 5/16 | 7/16 | Hot-Dip Galvanized | - | 1 |
| HTT5 | 11 | 2 1/2 | 16 | 1 3/8 | 7/16 | Zinc Galvanized, G90 | - | 1 |
| HTT5-3/4 | 11 | 2 1/2 | 16 | 1 3/8 | 7/16 | Zinc Galvanized, G90 | - | 1 |
| HTT5HDG | 11 | 2 1/2 | 16 | 1 3/8 | 7/16 | Hot-Dip Galvanized | - | 1 |
| HTT5KT | 11 | 2 1/2 | 16 | 1 3/8 | 7/16 | Zinc Galvanized, G90 | (1) HTT5 holdown, (1) BP 5/8-2 bearing plate washer and (26) #10 x 2-1/2-in. Strong-Drive SD Connector screws | 1 |
| HTTH6.5 | 10 | 3 | 20 1/4 | 1 5/16 | 17/32 | Zinc Galvanized, G90 | - | 1 |
| HTTH6.5HDG | 10 | 3 | 20 1/4 | 1 5/16 | 17/32 | Hot-Dip Galvanized | - | 1 |
Load Tables
These products are available with additional corrosion protection. Additional products on this page may also be available with this option. Check with Simpson Strong-Tie for details.
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.
HTTH6.5 Holddown Tension Ties Load Table
| Model No. | Ga. | Dimensions (in.) | SO (in.) | Fasteners (in.) | Minimum Wood Member Size (in.) | Allowable Tension Loads (160) | Deflection at Highest Allowable Load (in.) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| W | L | CL | Anchor Rod Diameter | Wood Fasteners | DF/SP | SPF/HF | |||||
| HTTH6.5 | 10 | 3 | 20 1/4 | 1 5/16 | 17/32 | 3/4 | (34) 0.148 x 2 1/2 | 3 x 3 1/2 | 6,115 | 5,640 | 0.136 |
| (34) 0.162 x 2 1/2 | 3 x 3 1/2 | 6,505 | 5,675 | 0.140 | |||||||
| (34) #10 x 1 1/2 SD | 1 1/2 x 7 1/4 | 5,375 | 5,010 | 0.128 | |||||||
| (34) #10 x 1 1/2 SD | 3 x 3 1/2 | 6,390 | 5,795 | 0.136 | |||||||
| (34) #10 x 2 1/2 SD | 3 x 3 1/2 | 7,650 | 6,760 | 0.147 | |||||||
- For additional information reference Holdown and Tension Tie General Notes.
- Allowable loads have been increased for earthquake or wind load durations with no further increase allowed. Reduce where other loads govern.
- The desgner must specify anchor bolt type, length and embedment.
- Fasteners: Nail dimensions are listed diameter by length. SD screws are Simpson Strong-Tie Strong-Drive SD Connector screws.
- HTTH6.5 installed with (34) 0.162" x 2 1/2" nails with no standard-cut washer has an allowable load of 5,935 lb. for DF/SP and 5,675 lb. for SPF/HF.
- HTTH6.5 installed with (34) #10 x 2 1/2" SD Strong-Drive screws with no standard-cut washer has an allowable load of 6,350 lb. for DF/SP and 6,240 lb. SPF/HF.
Code Reports & Compliance
Drawings
| DWG | DXF | RFA | IFC | SAT | |||
|---|---|---|---|---|---|---|---|
