{"product_id":"asthd-strap-tie-holdowns","title":"ASTHD Strap Tie Holdowns - Box of 50","description":"\u003ch2\u003eASTHD Strap Tie Holdowns — High-Load Uplift Resistance for Earthquake and Hurricane Zones\u003c\/h2\u003e\n\u003cp\u003eThe ASTHD Strap Tie Holdowns are 12-gauge galvanized steel connectors designed to embed into concrete foundations and nail to shear panel perimeter members, providing structural resistance against uplift loads caused by earthquake and hurricane forces. Engineered for economical, high-load performance, they are a preferred choice among contractors working on wood-framed structures in seismic and high-wind regions. The nail pattern is specifically designed to facilitate nailing to the edges of double 2x members, ensuring proper fastener placement and load transfer. Code listed under ESR-3635, these holdowns meet the requirements for use in IBC-governed construction.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e12ga. galvanized steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish Options\u003c\/td\u003e\n\u003ctd\u003eG-185 Triple Zinc or Hot-Dip Galvanized (call for availability)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCode Listing\u003c\/td\u003e\n\u003ctd\u003eESR-3635\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNail Type\u003c\/td\u003e\n\u003ctd\u003e10d common (3-inch long x 0.148-inch diameter) — may be used with no load reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Members\u003c\/td\u003e\n\u003ctd\u003eDouble 2x members (edges)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eEmbeds into concrete foundations; nails to shear panel perimeter members to resist uplift load from earthquake and hurricane forces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eASTHD10 Deflection at Highest Allowable ASD Load\u003c\/td\u003e\n\u003ctd\u003e0.067-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eASTHD14 Deflection at Highest Allowable ASD Load\u003c\/td\u003e\n\u003ctd\u003e0.084-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eASTHD10 Max LRFD Capacity\u003c\/td\u003e\n\u003ctd\u003e7700 pounds (with time effect factor of 1.0)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eASTHD14 Max LRFD Capacity\u003c\/td\u003e\n\u003ctd\u003e8250 pounds (with time effect factor of 1.0)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLRFD Seismic Load Conversion\u003c\/td\u003e\n\u003ctd\u003eMultiply seismic ASD loads by 1.4 to obtain LRFD capacities\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLRFD Wind Load Conversion\u003c\/td\u003e\n\u003ctd\u003eMultiply wind ASD loads by 1.6 to obtain LRFD capacities\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Center-to-Center Spacing\u003c\/td\u003e\n\u003ctd\u003e3 times the required embedment (Smin = 3 x LE) for holdowns acting in tension simultaneously\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMid-Wall End Distance\u003c\/td\u003e\n\u003ctd\u003eBased on 1.5 x LE end distance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIBC Seismic Design Category Note\u003c\/td\u003e\n\u003ctd\u003ePer IBC Section 1613.1, detached one- and two-family dwellings in SDC C and under may use design loads for SDCs A, B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAvailable Models — Load and Deflection Data\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eDeflection at Highest Allowable ASD Load\u003c\/th\u003e\n\u003cth\u003eMax LRFD Capacity (Time Effect Factor 1.0)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eASTHD10\u003c\/td\u003e\n\u003ctd\u003e0.067-inch\u003c\/td\u003e\n\u003ctd\u003e7700 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eASTHD14\u003c\/td\u003e\n\u003ctd\u003e0.084-inch\u003c\/td\u003e\n\u003ctd\u003e8250 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe ASTHD holdowns deliver an economical high-load solution compared to alternatives, with a nail pattern specifically configured for double 2x member edges to maximize fastener engagement. The availability of both G-185 Triple Zinc and Hot-Dip Galvanized finishes allows contractors to select the appropriate corrosion protection level for their project environment. Larger seat-bearing and designed direct nailing ensure proper installation of all nails, reducing the risk of installation error in the field.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003ch4\u003eHigh-Load Uplift Resistance\u003c\/h4\u003e\n\u003cp\u003eWith LRFD capacities up to 8250 pounds (ASTHD14) and 7700 pounds (ASTHD10), these holdowns are engineered for demanding seismic and wind uplift applications. High load capacity in a strap tie format gives contractors a reliable, code-compliant solution for shear wall assemblies.\u003c\/p\u003e\n\u003ch4\u003eOptimized Nail Pattern for Double 2x Members\u003c\/h4\u003e\n\u003cp\u003eThe nail pattern is specifically designed to facilitate nailing to the edges of double 2x members, ensuring all fasteners are properly placed for full load transfer. This reduces the chance of missed or improperly driven nails during installation.\u003c\/p\u003e\n\u003ch4\u003eNo Load Reduction with Standard 10d Common Nails\u003c\/h4\u003e\n\u003cp\u003e10d common nails (3-inch long x 0.148-inch diameter) may be used with no load reduction, simplifying fastener selection on the job site. Contractors can use a standard nail without downgrading the published load values.\u003c\/p\u003e\n\u003ch4\u003eLarger Seat-Bearing and Direct Nailing Design\u003c\/h4\u003e\n\u003cp\u003eThe larger seat-bearing area and designed direct nailing geometry promote proper installation of all nails, consistent with best practices for joist hanger and holdown connections. This design feature supports accurate, repeatable field installation.\u003c\/p\u003e\n\u003ch4\u003eDual Finish Options for Corrosion Protection\u003c\/h4\u003e\n\u003cp\u003eAvailable in G-185 Triple Zinc or Hot-Dip Galvanized finishes, the ASTHD accommodates projects with varying exposure and corrosion requirements. Contractors should call for availability of the Hot-Dip Galvanized option.\u003c\/p\u003e\n\u003ch4\u003eCode Listed — ESR-3635\u003c\/h4\u003e\n\u003cp\u003eListing under ESR-3635 provides the documentation needed for plan review and inspection approval on IBC-governed projects. The IBC Section 1613.1 provision for SDC C and below further simplifies design for qualifying residential structures.\u003c\/p\u003e\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003ch4\u003eShear Wall Holdown at Concrete Foundation\u003c\/h4\u003e\n\u003cp\u003eThe ASTHD embeds into concrete foundations and connects to shear panel perimeter members, anchoring the wood-framed wall system against uplift forces at the base of the structure.\u003c\/p\u003e\n\u003ch4\u003eSeismic Uplift Resistance\u003c\/h4\u003e\n\u003cp\u003eUsed in Seismic Design Categories where uplift loads from lateral earthquake forces must be transferred from the shear panel into the foundation, the ASTHD provides the required load path continuity.\u003c\/p\u003e\n\u003ch4\u003eHurricane and High-Wind Uplift Resistance\u003c\/h4\u003e\n\u003cp\u003eIn high-wind regions, the ASTHD resists uplift loads caused by hurricane forces acting on the structure, helping maintain the integrity of the wall-to-foundation connection.\u003c\/p\u003e\n\u003ch4\u003eDouble 2x Perimeter Member Connections\u003c\/h4\u003e\n\u003cp\u003eThe nail pattern is optimized for nailing to the edges of double 2x members, making the ASTHD well-suited for shear panel assemblies where double studs or boundary members are used at panel edges.\u003c\/p\u003e\n\u003ch3\u003eCompatible Materials\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConcrete foundations (embedment)\u003c\/li\u003e\n\u003cli\u003eDouble 2x lumber members (edge nailing)\u003c\/li\u003e\n\u003cli\u003eShear panel perimeter members\u003c\/li\u003e\n\u003cli\u003e10d common nails (3-inch long x 0.148-inch diameter)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Documents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0551\/8396\/6382\/files\/ASTHD.pdf?v=1794230265\" target=\"_blank\" rel=\"noopener\"\u003eASTHD Catalog Page (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the primary application for the ASTHD Strap Tie Holdowns?\u003c\/strong\u003e\u003cbr\u003eA: The ASTHD holdowns embed into concrete foundations and nail to shear panel perimeter members to resist uplift load caused by earthquake and hurricane forces on a structure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What nail type should be used, and is there a load reduction?\u003c\/strong\u003e\u003cbr\u003eA: 10d common nails (3-inch long x 0.148-inch diameter) may be used with no load reduction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What are the maximum LRFD capacities for the ASTHD10 and ASTHD14?\u003c\/strong\u003e\u003cbr\u003eA: The ASTHD10 must not exceed 7700 pounds and the ASTHD14 must not exceed 8250 pounds LRFD capacity, with a time effect factor of 1.0.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I convert ASD loads to LRFD capacities?\u003c\/strong\u003e\u003cbr\u003eA: Multiply seismic ASD loads by 1.4 and wind ASD loads by 1.6 to obtain LRFD capacities, subject to the maximums stated above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What finish options are available, and how do I order the Hot-Dip Galvanized version?\u003c\/strong\u003e\u003cbr\u003eA: The ASTHD is available in G-185 Triple Zinc or Hot-Dip Galvanized finishes. Call for availability of the Hot-Dip Galvanized option.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the minimum spacing requirement when multiple holdowns are acting in tension simultaneously?\u003c\/strong\u003e\u003cbr\u003eA: The minimum center-to-center spacing is 3 times the required embedment (Smin = 3 x LE) for holdowns acting in tension simultaneously. Mid-wall location is based on 1.5 x LE end distance.\u003c\/p\u003e","brand":"Tamlyn","offers":[{"title":"Default Title","offer_id":67993726582958,"sku":"ASTHD14","price":2223.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0551\/8396\/6382\/files\/86b18f33-430a-4714-9915-cea9800dce47.png?v=1794234767","url":"https:\/\/www.diamondtoolstore.com\/products\/asthd-strap-tie-holdowns","provider":"Diamond Tool Store","version":"1.0","type":"link"}