The HD is designed to create high allowable loads for both vertical and horizontal applications in wood construction. This holdown is installed with bolts into posts or columns. The HD can be installed back to back when eccentricity is an issue.
- Model No. HD12
- Base/Seat Thickness (in.) 3/8
- Ga. 3
- SB (in.) 4
- HB (in.) 7
- W (in.) 3 1/2
- H (in.) 20 5/16
- B (in.) 4 1/4
- CL (in.) 2 1/8
- SO (in.) 3 5/8
- Coating/Material. Simpson Strong-Tie Gray Paint
Key Features
- High-capacity low-deflection holdown
- Self-jigging, ensuring the code-required minimum of seven bolt diameters from the end of the post when installed flush with the sill plate
- May be raised and installed off the sill plate
Installation
- Fasteners Required: (4) 1" Machine Bolts - (1) 1" Or 1-1/8" Concrete Anchor
- Bolt holes shall be a minimum of 1/32" to a maximum of 1/16" larger than the bolt diameter (per 2015/2018 NDS, section 12.1.3.2)
- Stud bolts should be snugly tightened with standard-cut washers between the wood and nut (BPs are required in the City and County of Los Angeles)
- Standard-cut washer is required under the anchor nut for HD12 with 1" anchor and HD19 with 1 1/8" anchors
California Proposition 65
⚠WARNING: – www.P65Warnings.ca.gov.
We are providing this warning pursuant to a law passed by California in 1986 called the “California Safe Drinking Water and Toxic Enforcement Act of 1986”, or “Proposition 65” for short.
A Proposition 65 warning does not mean a product is in violation of any product-safety standards or requirements. In fact, the California government has clarified that “[t]he fact that a product bears a Proposition 65 warning does not mean by itself that the product is unsafe.”
The California agency tasked with implementing Proposition 65 has also explained, “You could think of Proposition 65 more as a ‘right to know’ law than a pure product safety law.” See http://oehha.ca.gov/prop65/background/p65plain.html
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