SIMPSONSKU: LSTHD8

Simpson 18-5/8" Strap-Tie Holdown, Galvanized LSTHD8


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Product Description

The Simpson LSTHD8 18-5/8 in. 14-Gauge Galvanized Strap-Tie Holdown is an embedded strap-tie holdown engineered with features that aid correct installation and improve performance in both wood and cold-formed steel construction. When installed on the forms with the StrapMate strap holder or other holding device, the unique design of this light cast-in-place strap-tie holdown delivers enhanced stability before and during the pour to help prevent both parallel and perpendicular movement.

Key Features

  • Staggered nailing pattern - helps minimize splitting and allows for nailing to the edges of double 2x members, making installation cleaner and reducing the risk of wood damage during fastening.
  • Countersunk strap nail slots - provide a lower nail head profile when used with specified fasteners, resulting in a flush, secure connection that won't interfere with adjacent framing members.
  • Slots below the embedment line - enable increased front-to-back concrete bond and help reduce spalling, giving you a stronger, more reliable anchor point in cast-in-place concrete applications.
  • 14-gauge steel construction - delivers a solid structural hold in a light, manageable form factor suited for both wood framing and cold-formed steel projects.
  • Zinc Galvanized (G90) finish - provides extra corrosion resistance to support long-term durability in demanding jobsite and environmental conditions.

Why This Product

  • Engineered for pour-stage stability - the design actively helps prevent both parallel and perpendicular movement before and during the concrete pour, reducing the chance of costly repositioning or rework on the jobsite.
  • Built for versatile structural applications - compatible with both wood and cold-formed steel construction, this embedded holdown strap adapts to a wide range of residential and light commercial framing scenarios without requiring a different connector.
  • Installation-friendly design details - from countersunk nail slots to a staggered hole pattern, every element of this holdown strap is designed to make proper placement faster and more straightforward, even in tight framing conditions.
  • Domestic Simpson quality with corrosion protection - made to Simpson's engineering standards and finished with a G90 galvanized coating, this strap-tie holdown is built to hold up in the conditions where embedded concrete anchors are most commonly needed.

Specifications

  • Model No.: LSTHD8
  • Gauge: 14
  • Strap Length: 18-5/8 in.
  • Coating/Finish: Zinc Galvanized, G90
  • Install With: 0.148 in. x 3-1/4 in. nails
  • Country of Origin: United States

Frequently Asked Questions

What type of construction is the LSTHD8 designed for?
The LSTHD8 is designed to improve performance in both wood and cold-formed steel construction, making it a versatile embedded strap-tie holdown for a range of applications.
How does the staggered nailing pattern benefit installation?
The staggered nailing pattern helps to minimize splitting and allows for nailing to the edges of double 2x members, improving both ease of installation and structural integrity.
What corrosion protection does the LSTHD8 offer?
The LSTHD8 features a Zinc Galvanized (G90) coating, which provides extra corrosion resistance to help ensure long-term durability in demanding environments.
What fasteners should be used to install the LSTHD8?
The LSTHD8 should be installed with 0.148 in. x 3-1/4 in. nails for proper performance and code compliance.

Note: Product dimensions and/or Screw or Bolt holes may differ from picture.

Download Specs Sheet: LSTHD_-_STHD_Strap-Tie_Holdowns.pdf

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