HDU Holdown
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Product Details
The HDU is designed for use in shearwalls and braced-wall panels, as well as other lateral applications in wood construction. The HDU uses Strong-Drive® SDS Heavy-Duty Connector screws which install easily, reduce fastener slip and provide a greater net section than bolts.
Key Features
- Strong-Drive SDS Heavy-Duty Connector screws are supplied with the holdown to ensure proper fasteners are used
- Predeflected seat eliminating deflection under load
- No stud bolts to countersink at openings
Material
- See table
Finish
- Galvanized
Installation
- See General Notes for Holdowns and Tension Ties.
- The HDU requires no additional washer.
- Strong-Drive SDS Heavy-Duty Connector screws install best with a low-speed, high-torque drill equipped with a 3/8" hex-head driver.
- Fasteners and crescent washer are included with the holdowns. For replacements, order part no. SDS25212-HDU_. (Fill in the size needed, e.g., HDU2.)
Related Literature
Product Information Table
| Model No. | Ga. | W (in.) | H (in.) | B (in.) | CL (in.) | SO (in.) | Coating/Material | Product Includes | Packaging Qty. |
|---|---|---|---|---|---|---|---|---|---|
| HDU11-SDS2.5 | 10 | 3 | 22 1/4 | 3 1/2 | 1 3/8 | 1 1/2 | Zinc Galvanized, G90 | (30) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer | 1 |
| HDU11-SDS2.5HDG | 10 | 3 | 22 1/4 | 3 1/2 | 1 3/8 | 1 1/2 | Hot-Dip Galvanized | (30) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer | 1 |
| HDU14-SDS2.5 | 7 | 3 | 25 11/16 | 3 1/2 | 1 9/16 | 1 9/16 | Zinc Galvanized, G90 | (36) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws, (1) crescent washer and (1) heavy-hex anchor nut | 1 |
| HDU14-SDS2.5HDG | 7 | 3 | 25 11/16 | 3 1/2 | 1 9/16 | 1 9/16 | Hot-Dip Galvanized | (36) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws, (1) crescent washer and (1) heavy-hex anchor nut | 1 |
| HDU2-SDS2.5 | 14 | 3 | 8 11/16 | 3 1/4 | 1 5/16 | 1 3/8 | Zinc Galvanized, G90 | (6) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer | 1 |
| HDU2-SDS2.5HDG | 14 | 3 | 8 11/16 | 3 1/4 | 1 5/16 | 1 3/8 | Hot-Dip Galvanized | (6) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer | 1 |
| HDU4-SDS2.5 | 14 | 3 | 10 15/16 | 3 1/4 | 1 5/16 | 1 3/8 | Zinc Galvanized, G90 | (10) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer | 1 |
| HDU4-SDS2.5HDG | 14 | 3 | 10 15/16 | 3 1/4 | 1 5/16 | 1 3/8 | Hot-Dip Galvanized | (10) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer | 1 |
| HDU5-SDS2.5 | 14 | 3 | 13 3/16 | 3 1/4 | 1 5/16 | 1 3/8 | Zinc Galvanized, G90 | (14) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer | 1 |
| HDU5-SDS2.5HDG | 14 | 3 | 13 3/16 | 3 1/4 | 1 5/16 | 1 3/8 | Hot-Dip Galvanized | (14) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer | 1 |
| HDU8-SDS2.5 | 10 | 3 | 16 5/8 | 3 1/2 | 1 3/8 | 1 1/2 | Zinc Galvanized, G90 | (20) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer | 1 |
| HDU8-SDS2.5HDG | 10 | 3 | 16 5/8 | 3 1/2 | 1 3/8 | 1 1/2 | Hot-Dip Galvanized | (20) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer | 1 |
Load Tables
These products are available with additional corrosion protection.
- HDU14 requires heavy-hex anchor nut to achieve tabulated loads (supplied with holdown).
- HDU14 loads on 4x6 post are applicable to installation on either the narrow or the wide face of the post.
- Fasteners: Nail dimensions are listed diameter by length. SD and SDS screws are Simpson Strong-Tie® Strong-Drive SD Connector and SDS Heavy-Duty Connector screws. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.
Code Reports & Compliance
Drawings
| DWG | DXF | RFA | IFC | SAT | |||
|---|---|---|---|---|---|---|---|
