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LSTHD Light Strap-Tie Holdown

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The LSTHD is an embedded strap-tie holdown 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

  • The staggered nailing pattern helps to minimize splitting and allows for nailing to the edges of double 2x members
  • Strap nail slots are countersunk to provide a lower nail head profile when used with specified fasteners
  • The slots below the embedment line enable increased front-to-back concrete bond and help to reduce spalling


  • 14 gauge


  • Galvanized


  • See General Notes for Holdowns and Tension Ties.
  • Use all specified fasteners; see General Notes.
  • Use tables for both standard concrete and post-tension slab installations.
  • Install before concrete pour with a StrapMate, or other holding device.
  • Nail strap from the bottom up. Install strap plumb.
  • Strap may be bent one full cycle (bent horizontal 90° then bent vertical) to aid wall placement, but may cause spalling behind the strap. If the spall is 1″ or less, measured from the embedment line to the bottom of the spall, full loads apply. 1″ to 4″ spalls for LSTHD8 achieve 0.9 times table loads. Any portion of the strap left exposed should be protected against corrosion.
  • Other than where noted in the two-pour detail, do not install where: (a) a horizontal cold joint exists within the embedment depth between the slab and foundation wall or footing beneath, unless provisions are made to transfer the load, or the slab is designed to resist the load imposed by the anchor; or (b) slabs are poured over concrete block foundation walls.
  • Additional studs attached to the shearwall studs or post may be required by the designer for wall sheathing nailing.
  • Wood shrinkage after strap installation across horizontal members may cause the strap to buckle outward.
  • For installations in severe corrosion environments, refer to General Corrosion Risks for additional considerations.
  • See installation illustrations in the image gallery for rebar information.
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