Simpson Strong-Tie 34 in. H X 3 in. W 12 Ga. Steel Strap

The STHD is an embedded strap-tie hold-down offering high load capacity and a staggered nail pattern to help minimize splitting. The STHD incorporates many features that aid in the correct installation and improve performance. When installed on the forms with the StrapMate strap holder the unique design of the STHD delivers enhanced stability before and during the pour to help prevent both parallel and perpendicular movement. The strap may be bent one full cycle (bent horizontal 90 degrees then bent vertical) to aid wall placement but may cause spalling behind the strap. If the spall is 1 in. or less, measured from the embedment line to the bottom of the spall, full loads apply. STHD10 and STHD14 achieve full load for spalls less than 4 in.. 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.