{"product_id":"simpson-atrm8-4-atrm-1-in-x-48-in-all-thread-rod-grade-55","title":"Simpson ATRM8-4 1 in. x 48 in. All-Thread Rod, Grade 55 Medium-Strength","description":"\u003cdiv\u003e\n \u003cp\u003eThe \u003cstrong\u003eSimpson Strong-Tie ATRM8-4 ATRM 1 in. x 48 in. All-Thread Rod, Grade 55\u003c\/strong\u003e is a fully threaded steel rod engineered by \u003cstrong\u003eSimpson Strong-Tie\u003c\/strong\u003e to serve as a tension transfer element in structural systems designed to resist seismic and wind forces. This all-thread rod delivers a continuous and reliable load path from roof to foundation, making it a trusted solution for shearwall overturning restraint within continuous rod tiedown systems and for uplift restraint in roof applications. Its versatility extends further to use as an adhesive anchor rod, giving builders and engineers a single rod solution across multiple critical structural applications.\u003c\/p\u003e\n\n \u003ch3\u003eKey Features\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003ePrecut 48 in. length\u003c\/strong\u003e - ready to install straight out of the box, eliminating on-site cutting and saving labor time during structural assembly.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eGrade 55 specification\u003c\/strong\u003e - delivers a minimum yield strength of 55 ksi (Fy = 55 ksi) and a minimum tensile strength of 75 ksi (Fu = 75 ksi) per ASTM A36, providing the structural integrity required for seismic and wind-resisting systems.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eUNC Class 2A thread specification\u003c\/strong\u003e - ensures precise, standardized thread fit for reliable mating with nuts, couplers, and tiedown hardware used in strong-rod systems.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eUncoated black steel construction\u003c\/strong\u003e - a clean, no-frills finish suited for interior structural applications where corrosion exposure is not a concern, keeping costs efficient.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e1 in. rod diameter\u003c\/strong\u003e - provides the cross-sectional area needed to carry significant tension loads in continuous rod tiedown and uplift restraint systems.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFully threaded along the entire 48 in. length\u003c\/strong\u003e - allows couplers, bearing plates, and tiedown hardware to be positioned anywhere along the rod, giving installers maximum flexibility in system layout.\u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3\u003eWhy This Product\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003eDesigned specifically as a tension transfer element for seismic and wind-resisting structural systems, this all-thread rod supports a continuous load path from roof to foundation - addressing one of the most critical performance requirements in modern structural design.\u003c\/li\u003e\n \u003cli\u003eThe precut 48 in. length reduces field preparation time, making it a practical choice for contractors who need consistent, installation-ready components across repetitive framing conditions.\u003c\/li\u003e\n \u003cli\u003eIts dual suitability for continuous rod tiedown systems (shearwall overturning restraint) and uplift restraint systems for roofs means a single product type can serve multiple structural roles on the same project.\u003c\/li\u003e\n \u003cli\u003eManufactured in the United States and meeting ASTM A36 Grade 55 standards, this rod is built to verified mechanical property requirements - giving engineers and inspectors a dependable basis for structural calculations and code compliance.\u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3\u003eSpecifications\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Simpson Strong-Tie\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e ATRM8-4\u003c\/li\u003e\n\n \u003cli\u003e\n\u003cstrong\u003eProduct Class:\u003c\/strong\u003e Threaded Rod\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRod Diameter:\u003c\/strong\u003e 1 in.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRod Length:\u003c\/strong\u003e 48 in.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eThread Specification:\u003c\/strong\u003e UNC Class 2A\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e Grade 55\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eMaterial Standard:\u003c\/strong\u003e ASTM A36; Fy = 55 ksi \u0026amp; Fu = 75 ksi\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Uncoated Steel\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Uncoated Steel\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eProp 65:\u003c\/strong\u003e No\u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3\u003eApproved Applications\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003eContinuous rod tiedown systems for shearwall overturning restraint\u003c\/li\u003e\n \u003cli\u003eUplift restraint systems for roofs\u003c\/li\u003e\n \u003cli\u003eAdhesive anchor rod applications\u003c\/li\u003e\n \u003cli\u003eStructural systems designed to resist seismic forces\u003c\/li\u003e\n \u003cli\u003eStructural systems designed to resist wind forces\u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n \u003cdl\u003e\n \u003cdt\u003e\u003cstrong\u003eWhat is the difference between this all-thread rod and a standard partially threaded rod?\u003c\/strong\u003e\u003c\/dt\u003e\n \u003cdd\u003eThis ATRM rod is fully threaded along its entire 48 in. length (all-thread rod), which means nuts, couplers, bearing plates, and tiedown hardware can be engaged at any point along the rod. A partially threaded rod only has threads at one or both ends, limiting where hardware can be positioned. Full threading is required for continuous rod tiedown systems where hardware placement must be flexible.\u003c\/dd\u003e\n \u003cdt\u003e\u003cstrong\u003eWhat does Grade 55 mean for this threaded rod?\u003c\/strong\u003e\u003c\/dt\u003e\n \u003cdd\u003eGrade 55 refers to the mechanical strength classification of this rod per ASTM A36 standards. It indicates a minimum yield strength (Fy) of 55 ksi and a minimum tensile strength (Fu) of 75 ksi. These values define how much load the rod can carry before permanent deformation or fracture, and they are the values engineers use in structural calculations for seismic and wind-resisting system design.\u003c\/dd\u003e\n \u003cdt\u003e\u003cstrong\u003eCan this rod be used as an adhesive anchor rod?\u003c\/strong\u003e\u003c\/dt\u003e\n \u003cdd\u003eYes. In addition to its role in continuous rod tiedown and uplift restraint systems, the Simpson Strong-Tie ATRM is also suitable for use as an adhesive anchor rod, making it a versatile component for a variety of structural anchoring applications.\u003c\/dd\u003e\n \u003cdt\u003e\u003cstrong\u003eIs this rod suitable for outdoor or exposed environments?\u003c\/strong\u003e\u003c\/dt\u003e\n \u003cdd\u003eThis rod features an uncoated black steel finish with no applied corrosion-resistant coating. It is best suited for interior or protected structural applications where direct moisture and corrosion exposure are not concerns. For applications in corrosive or outdoor environments, a coated or stainless rod option should be evaluated.\u003c\/dd\u003e\n \u003c\/dl\u003e\n\u003c\/div\u003e","brand":"SIMPSON","offers":[{"title":"Default Title","offer_id":48085361459430,"sku":"ATRM8-4","price":39.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0398\/5188\/4705\/files\/ATRM_7-8.png?v=1785360272","url":"https:\/\/factorydirectsupply.com\/products\/simpson-atrm8-4-atrm-1-in-x-48-in-all-thread-rod-grade-55","provider":"FactoryDirectSupply.com","version":"1.0","type":"link"}