The Simpson HST Heavy Strap Tie is a heavy, load-rated, precut strap engineered to support heavy, concentrated loads by creating a strong connection between wood girders and piles. Built from 3-gauge steel with a hot-dip galvanized finish, this structural strap tie delivers optimal performance in demanding exterior and treated-wood applications where wind and seismic resistance are critical requirements.

Key Features

• Installs with machine bolts - provides a secure, bolt-fastened connection suited to heavy structural loads without relying on nails or lighter fasteners
• Designed to resist wind and seismic forces - engineered for use in lateral-force-resisting systems, making it appropriate for construction in high-wind and seismic zones
• Made from 3-gauge steel - the heavy material thickness delivers the load capacity needed for demanding girder-to-pile and similar high-stress connections
• Hot-dip galvanization offers extra corrosion resistance - the HDG coating is suited for exterior applications and direct contact with treated lumber, where standard coatings can break down prematurely due to moisture and chemical exposure
• Precut strap format - arrives ready to install at the correct length, reducing layout time and the risk of field-cutting errors on the job site

Why This Product

• Purpose-built for girder-to-pile connections - unlike general-purpose straps, the HST is specifically designed to handle heavy, concentrated loads at the girder-to-pile interface, giving structural builders a load-rated solution rather than a field-improvised one
• HDG coating goes beyond standard galvanizing - hot-dip galvanization provides a thicker, more durable protective layer than standard zinc coatings, making this strap tie a reliable choice for coastal, exterior, and treated-lumber environments where corrosion is an ongoing concern
• Engineered for code-sensitive structural applications - the strap is designed to resist wind and seismic forces, supporting use in structural systems where performance under lateral loads must meet engineering and code requirements
• Simple, straightforward installation - the bolt-installed, precut design keeps the connection method clean and consistent, reducing variables on complex structural connections

Specifications

• Model Number: HST3HDG
• Brand: Simpson Strong-Tie
• Width: 3 in.
• Length: 25-1/2 in.
• Gauge: 3
• Coating: Hot-Dip Galvanized
• Finish: Hot-Dip Galvanized
• Installation Hardware: Install with (6) 3/4 in. diameter HDG bolts (sold separately)
• Country of Origin: United States

Approved Applications

• Connecting wood girders to piles under heavy, concentrated loads
• Exterior construction requiring corrosion-resistant hardware
• Applications using treated lumber where standard galvanized coatings may be insufficient
• Structural connections in wind- and seismic-force-resisting systems

Frequently Asked Questions

What type of fasteners are required to install the HST3HDG?

The HST3HDG installs with (6) 3/4 in. diameter hot-dip galvanized (HDG) machine bolts.

Why is hot-dip galvanization important for this strap tie?

Hot-dip galvanization (HDG) offers extra corrosion resistance, making the HST3HDG well suited for exterior and treated-wood applications where moisture and chemical exposure can accelerate corrosion in standard coatings.

What is the primary structural purpose of the HST3HDG?

The HST3HDG is designed to support heavy, concentrated loads by creating a strong connection between wood girders and piles, and it is specifically engineered to resist wind and seismic forces.

What are the dimensions and material thickness of the HST3HDG?

The HST3HDG measures 3 in. wide by 25-1/2 in. long and is made from 3-gauge steel, making it a heavy-duty, load-rated precut strap designed for optimal structural performance.

Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.