| Prohibited or Dangerous Application | Reason | | :--- | :--- | | in seismic zones (D, E, F) | Lack of guaranteed strain-hardening capacity and impact toughness. | | High-tension bracing connections (e.g., tension-only braced frames) | Steel tensile failure may occur before concrete breakout, leading to brittle collapse. | | Epoxy-grouted or adhesive anchors under sustained tension | A307 bolts have no surface treatment spec; smooth surface reduces bond strength. Adhesive manufacturers often require F1554. | | Shear lugs with tension (combined loading >20% of capacity) | Low shear strength relative to higher-grade bolts. | | Post-installed anchors in overhead life-safety applications | IBC prohibits unless specifically tested per ACI 355.2. A307 rarely qualifies. |
| Property | Value | | :--- | :--- | | | 60 ksi (414 MPa) minimum | | Yield Strength | 36 ksi (248 MPa) minimum (typical, not mandatory by ASTM but implied by material) | | Elongation | 18% minimum (in 8 in.) – High ductility | | Hardness | Brinell 100–241 | | Threads | UNC series (Class 1A or 2A) | | Material | Low-carbon steel (e.g., A36, 1018) | a307 anchor bolt
Using AISC 360 and ACI 318-19, the nominal steel strength of an A307 anchor bolt in tension is: | Prohibited or Dangerous Application | Reason |
Performance, Limitations, and Specification of ASTM A307 Anchor Bolts in Structural Applications Adhesive manufacturers often require F1554
Note: Unlike F1554, A307 does not mandate a specific yield strength; instead, it relies on tensile strength and bend tests. However, the base material (A36) ensures a yield floor of 36 ksi.