Strong-Bolt® Wedge Anchor for Cracked and Uncracked Concrete
Tension Strength Design Data1
- The information presented in this table is to be used in conjunction with the design criteria of ACI 318 Appendix D, except as modified below.
- The value of φ applies when the load combinations of ACI 318 Section 9.2 are used. If the load combinations of ACI 318 Appendix C are used, refer to Section D4.5 to determine the appropriate value of φ. The 3⁄4 inch and 1 inch diameter are considered as a brittle steel element. The 1/2 inch and 5/8 inch diameters are considered as ductile steel elements.
- Pullout strength is not reported since concrete breakout controls.
- Adjust the characteristic pullout resistance for other concrete compressive strengths by multiplying the tabular value by (f'c,specified / 2,500)0.7.
- Adjust the characteristic pullout resistance for other concrete compressive strengths by multiplying the tabular value by (f'c,specified / 2,500)0.5.
- The value of φ applies when both the load combinations of ACI 318 Section 9.2 are used and the requirements of Section D4.4(c) for Condition B are met.If the load combinations of ACI 318 Appendix C are used, refer to Section D4.5 to determine the appropriate value of φ.
- The modification factor ψcp,N = 1.0 for cracked concrete. Otherwise,the modification actor for uncracked concrete without supplementary reinforcement to control splitting is either:
| 1. ψcp,N = 1.0 if ca,min ≥ cac |
or |
2. ψcp,N = |
Ca,min |
≥ |
1.5hef |
if ca,min < cac |
|
|
| Cac |
Cac |
- The value of φ applies when both the load combinations of ACI 318 Section 9.2 are used and the requirements of Section D4.4(c) for Condition B are met. If the load combinations of ACI 318 Section 9.2 are used and the requirements of Section D4.4(c) for Condition A are met, refer to Section D4.4 to determine the appropriate value of φ. If the load combinations of ACI 318 Appendix C are used, refer to Section D4.5 to determine the appropriate value of φ.
- For sand-lightweight concrete, in lieu of ACI 318 Section D.3.4, modify the value of concrete breakout strength by 0.60. All-lightweight concrete is beyond the scope of this table.
- For sand-lightweight concrete, modify the value of Np,cr, Np,uncr and Neq by 0.60. All-lightweight concrete is beyond the scope of this table.
