Page 41 of Wood Construction Connectors 2006 Catalog by Simpson Strong-Tie

42 Anchors LSTHD/STHD Strap Tie Holdown Typical STHD Edge Installation (for two pour, see footnote 5.) Model No. Standard Rim Joist Min Stem Wall Strap Length (L) le Nails Allowable Tension Loads (DF/SP/HF/SPF) (133 160) End Distance Std Model Rim Joist Model le le le 2000 psi Concrete 2500 psi Concrete 3000 psi Concrete LSTHD8 LSTHD8RJ 6 21 35 8 24-16d sinker 1695 1695 1695 1825 1825 1825 1950 1950 1950 STHD8 STHD8RJ 6 21 35 8 24-16d sinker 1760 2050 2345 1950 2210 2385 2135 2370 2425 STHD10 STHD10RJ 6 23 36 10 28-16d sinker 2035 2575 3295 3730 3730 3730 3730 3730 3730 STHD14 STHD14RJ 6 31 39 14 38-16d sinker 3235 4220 4805 5025 5025 5025 5025 5025 5025 32, 28, 122 32, 121 LSTHD8 LSTHD8RJ 8 21 35 8 24-16d sinker 1695 1695 1695 1825 1825 2335 1950 1950 2975 STHD8 STHD8RJ 8 21 35 8 24-16d sinker 2370 2370 3195 2370 2370 3195 2370 2370 3195 STHD10 STHD10RJ 8 23 36 10 28-16d sinker 2745 2745 3725 3730 3730 3730 3730 3730 3730 STHD14 STHD14RJ 2 8 31 39 14 38-16d sinker 3885 4430 5785 5025 5025 5785 5025 5025 5785 5 Code Ref. " 1 " 1 " 1 " 1. RJ after the model indicates STHDs for rim joist applications, e.g. STHD8RJ. 2. STHD14RJ on 8" stemwall requires 30-16d sinkers, with the (le) load at 133% of 4960 lbs. 3. 10d commons or 12d common nails may be used with no load reduction. 4. Minimum nail end distance to prevent splitting is 10 x diameter, 1 for 16d sinkers, 10d common and 12d common. 5. For two pour with 4" slab or less. The STHD14 load at end distance 2000 psi is 3235 lbs. and 4220 lbs. at 14" end distance. The STHD10 at the same condition is 2035 lbs. for end distance, and 2750 lbs. at 10" end distance. 6. Allowable loads have been increased for earthquake or wind load durations with no further increase allowed; reduce where other load durations govern. 7. Strap may be bent one full cycle. (Bent horizontal 90 then bent vertical.) 8. Calculate loads using straight line interpolation for corner distances between and l e . STHD U.S. Patent 5,813,182 Nails are countersunk for a low profile strap surface. 9. STHD14 and STHD14RJ installed on HF/SPF in an 8" stemwall: the l e load is 5280 lbs. 10. Post design shall be by Designer. 11. Loads shown apply to post tension slabs when one #4 rebar (minimum) is installed as shown on page 43. 12. NAILS: 16d sinker 0.148" dia. x 3 long. See page 16-17 for other nail sizes and information. 13. STHD14 and STHD10 allowable loads for an End Installation Condition (Not a Corner) at end distance, 6-inch stem wall, 2500 psi concrete, are 3105 and 2095 lbs respectively. 14. STHD14 allowable loads for an end installation, 8-inch stem wall, 2500 psi concrete, and 1 end distances are 3645 and 4200 lbs respectively. 15. STHD14 allowable load for an end installation, 10-inch stem wall, end distance and 2500 psi concrete is 4500 lbs. Typical STHD14RJ Rim Joist Application This product is preferable to similar connectors because of a) easier installation, b) higher loads, c) lower installed cost, or a combination of these features. The STHD is an embedded strap tie holdown with high load capacity and a staggered nail pattern to help minimize splitting. The latest version of the STHD strap tie holdown incorporates many new features that improve installation and function. When used in conjunction with the StrapMate you have a system that helps prevent both parallel and perpendicular movement during installation relative to the form. Allows for accurate location of the STHDs and reduces the possibility of spalling! FEATURES The strap nailing pattern allows for nailing to the edges of double 2xs. A slot below the embedment line allows for increased front to back concrete bond and reduced spalling. Strap nail slots are countersunk to provide a lower nail head profile. Rim joist models accommodate up to a 17" clear span without any loss of strap nailing. MATERIAL: LSTHD8, LSTHD8RJ 14 ga, all others 12 ga. FINISH: Galvanized INSTALLATION: Use all specified fasteners. See General Notes. See Post Tension information on page 43. Install before concrete pour with a StrapMate, or other holding device. Nail strap from the bottom up. Strap may be bent one full cycle. Bending the strap 90 to aid wall placement 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. For spalls between 1" and 4" (see illustration), the allowable load is 0.90 of the table loads. Any portion of the strap left exposed should be protected against corrosion. For two pour installations spalling is measured from the first pour. Where fewer fasteners are used in the structural wood member, reduce loads according to the code. Unless otherwise noted, 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. To get the full table load, the minimum center-to-center spacing is twice the embedment depth when resisting tension loads at the same time. There is an increase in the amount of deflection if the strap is installed on the outside of the shear panel instead of directly to the framing. Ask for Form T-PLYWOOD for complete details. FOUNDATION CORNERS: Nail quantities may be reduced for less than le corner distance design loads use the code allowable loads for fasteners in shear. To tie double 2x members together, the Designer must determine the fasteners required to bind members to act as one unit without splitting the wood. 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 strap to buckle outward. CODES: See page 12 for Code Listing Key Chart.

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