TITEN HD® Heavy Duty Screw 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. Anchors are considered brittle steel elements.
- Pullout strength is not reported since concrete breakout controls.
- Adjust the characteristic pull-out 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 factor 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 modification factor, ψcp,N is applied to the nominal concrete breakout strength, Ncb or Ncbg.
- 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, Np,cr, Np,uncr and Neq by 0.6. All-lightweight concrete is beyond the scope of this table.
- Data for 5/8" anchor is only valid for THDB62 series.
