The Simpson Strong-Tie HD19 Bolted Hold Down Anchor is a high-capacity, low-deflection holdown engineered to develop high allowable loads in both vertical and horizontal applications within wood construction. Measuring 24-1/2 in. tall and 3-1/2 in. wide, the HD19 is installed with bolts directly into posts or columns, providing a secure, code-compliant connection between structural framing and the foundation. Its self-jigging design automatically positions the connector to maintain the code-required minimum of seven bolt diameters from the end of the post when installed flush with the sill plate - eliminating guesswork on the job site. When eccentricity is a concern, the HD19 can be installed back to back for a balanced, symmetrical connection. Fabricated in the United States from heavy 3-gauge steel with a 3/8 in. steel base and finished in Simpson Strong-Tie gray paint, this holdown delivers the durability and load performance that structural applications demand.

Key Features

• High-capacity low-deflection holdown - designed to create high allowable loads for both vertical and horizontal applications in wood construction
• Self-jigging design - ensures the code-required minimum of seven bolt diameters from the end of the post when installed flush with the sill plate
• Flexible installation - may be raised and installed off the sill plate when site conditions require
• Back-to-back installation - the HD19 can be installed back to back when eccentricity is an issue
• Bolted connection - installed with bolts into posts or columns for a strong, reliable attachment
• Heavy-gauge construction - body fabricated from 3-gauge steel; base constructed of 3/8 in. steel
• Durable finish - Simpson Strong-Tie gray paint coating provides corrosion resistance and a professional appearance
• Made in the United States

Specifications

• Manufacturer Part Number (MPN): HD19
• Width (W): 3-1/2 in.
• Height (H): 24-1/2 in.
• Body Gauge: 3-gauge steel
• Base Thickness: 3/8 in. steel
• Coating / Finish: Simpson Strong-Tie Gray Paint
• Installation Fasteners: 1-1/8 in. or 1-1/4 in. anchor bolt and (5) 1 in. stud machine bolts
• Country of Origin: United States

Approved Applications

• Vertical load transfer applications in wood-frame construction
• Horizontal load transfer applications in wood-frame construction
• Post and column connections requiring bolted holdown anchors
• Back-to-back installations where eccentricity is an issue
• Installations flush with the sill plate or raised off the sill plate

Installation

The Simpson HD19 is installed with bolts into posts or columns. The following fasteners are required for proper installation:

• Anchor bolt: 1-1/8 in. or 1-1/4 in. anchor bolt (1 required)
• Stud machine bolts: 1 in. stud machine bolts (5 required)

Frequently Asked Questions

What hardware is required to install the HD19?

The HD19 is installed with a 1-1/8 in. or 1-1/4 in. anchor bolt along with five 1 in. stud machine bolts, which connect the holdown to the post or column.

What are the dimensions and material specifications of the HD19?

The HD19 stands 24-1/2 in. tall and is 3-1/2 in. wide. It is constructed from 3-gauge steel for the body and features a 3/8 in. steel base, finished in Simpson Strong-Tie gray paint.

Can the HD19 be installed off the sill plate?

Yes. While the HD19's self-jigging design is optimized for flush installation with the sill plate - automatically maintaining the code-required minimum of seven bolt diameters from the end of the post - it may also be raised and installed off the sill plate when site conditions require it.

Can the HD19 be used when eccentricity is a concern?

Yes. The HD19 can be installed back to back when eccentricity is an issue, providing a balanced and symmetrical connection to help address eccentric load conditions in wood construction applications.