Simpson Strong-Tie offers a wide variety of bolted holdowns offering lowdeflection performance for a range of load requirements. The HD9B holdown has been tested in accordance with ICC-ES's AC 155 acceptance criteria and are approved for use in vertical and horizontal applications. The HD9B bolted holdown incorporates the proven design of our HDQ8 SDS-style holdown and feature a unique seat design which greatly minimizes deflection under load. HDB holdowns are self jigging, ensuring that the code-required minimum of seven bolt diameters from the end of the post is met. They can be installed directly on the sill plate or raised above it and are suitable for back-to-back applications where eccentricity is a concern. HDBs are designed to provide loads for intermediate-load-range shearwalls, braced-wall panels and lateral applications.

• Use all specified fasteners.
• Bolt holes shall be a minimum of 1/32" to a maximum of 1/16" larger than the bolt diameter (per 2012 NDS, section 11.1.3.2).
• Stud bolts should be snugly tightened with standard cut washers between the wood and nut (BP's are required in the City and County of Los Angeles).
• HD and HDB holdowns are self-jigging and will ensure minimum bolt end distance when installed flush with the sill plate.
• Standard cut washer is required under the anchor nut for HD12 with 1" anchor and HD19 with 1 1/8" anchors.

NOTE: The correct fasteners installed in the correct position must be used to achieve published load values

California Residents: WARNING