Drywall Framing System
Simpson® Strong-Tie® holdowns provide cost-effective shear wall attachment and are used to transfer tension loads between floors or from structural members to the foundation.
Two-piece welded construction comes in three sizes for optimal performance. Installation is made easy with prepunched holes.
ASTM: A570, A653/A653M, A1011
|Product code||Simpson reference||Gauge||Mils||Design thickness (in)||Size (in)||Packaging|
|HD8||S/HD8S||10||118||0.1242||2-5/16 x 11||Dependent on Order Quantity|
|HD10||S/HD10S||10||118||0.1242||2-5/16 x 13-1/2|
|HD15||S/HD15S||7||170||0.1790||2-7/16 x 17|
Install the Simpson HD holdowns using SSTB anchor bolts or alternate anchorage calculated to resist the tension load for your specific application. Use steel nylon locking nuts or thread adhesive to minimize the chance of nut spin. Secure the HD holdown to the steel framing member by filling all the prepunched holes with #10 screws.
Reference section R603.7.2 of the International Residential Code (IRC) for holdown requirements in residential applications. Consult the engineer of record for commercial applications.
Simpson® and Simpson Strong-Tie® are trademarks of the Simpson Strong-Tie® Company, Inc.