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Strong-Bolt Characteristic Tension Design Values
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Information on this page has been updated since the printing of the 2007 Anchor Systems Catalog (C-SAS-2007).
To view the specific changes made to this page in detail, visit Product Information Updates. |
- 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
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 . The 3/4 inch diameter is considered as a brittle steel element. The 1/2 inch, 5/8 inch, and 1 inch diameters are considered as ductile steel elements.
- Pull-out 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)0.7.
- 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 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 .
- The modification factor
cp,N = 1.0 for cracked concrete. Otherwise, the modification factor for uncracked concrete without supplementary reinforcement to control splitting is either: (1) cp,N = 1.0 if ca,min ≥ cac or
| (2) |
cp,N = |
ca,min |
≥ |
1.5hef |
if ca,min < cac. |
| cac |
ccr |
The modification factor, cp,N is applied to the nominal concrete breakout strength, Ncb or Ncbg.
- The value of 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 . If the load combinations of ACI 318 Appendix C are used, refer to Section D4.5 to determine the appropriate value of .
- For sand-lightweight concrete, in lieu of ACI 318 Section D.3.4, modify the value of Nn by multiplying all values of √f'c affecting Nn by 0.60. All-lightweight concrete is beyond the scope of this table.
- For sand-lightweight concrete, modify the value of Npn,cr , Npn,uncr and Neq by 0.60. All-lightweight concrete is beyond the scope of this table.
