The HDB is designed to provide loads for intermediate-load-range shearwalls, braced-wall panels and lateral applications in wood construction. This bolted holdown is installed with bolts into studs or columns and offers low-deflection performance for a range of load requirements. The HDB is suitable for back-to-back applications where eccentricity is a concern.
Installed after the placement of concrete and framing is in place
Can be installed directly on the sill plate or raised above it
Self-jigging, ensuring the code-required minimum of seven bolt diameters from the end of the post when installed flush with the sill plate
Galvanized or HDG
See General Notes for Holdowns and Tension Ties
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 126.96.36.199)
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)
To achieve published loads, machine bolts shall be installed with the nut on the opposite side of the holdown. If this orientation is reversed, the designer shall reduce the allowable loads shown per NDS requirements when bolt threads are in the shear plane.
On a Sunday evening in the summer of 1956, Barclay Simpson’s doorbell rang. A neighbor’s brother had stopped by to ask if he could make a product to connect the ends of 2x4s for a roof. Barclay replied, “Of course!” So he sat down with his plant foreman, developed some rough sketches and used a punch press to create his first joist hanger.
That simple beginning was about more than just solving problems. For Barclay, it was about putting the customer first. Our phrase–”Our customers are our bosses”– is a simple philosophy that permeates all that we do.
At Simpson Strong-Tie, it’s about enjoying what we do, doing it right and supporting our customers every step of the way–from order placed to product installed.
Today, Simpson Strong-Tie is the world leader in structural product solutions–solutions that not only help our customers, but help make structures safer and stronger. The company is recognized as the genuine connector brand in the residential construction industry, and also for its ever-expanding offering of shearwalls, moment frames and fasteners. In the last two decades, the company has expanded further with products for infrastructure, commercial and industrial construction, including mechanical anchors, adhesives and products that repair, protect and strengthen concrete and masonry.
But even with all of the growth, we still keep it simple, focusing on the core values that Barclay instilled and living up to our reputation of reliability, innovation, quality and service.