Title: Concrete Q&A: Load Factors for Service-Level Wind Loads and Anchor Stretch Length, Sleeves, and Effective Depth

Author(s):

Publication: Concrete International

Volume: 44

Issue: 9

Appears on pages(s): 71-72

Keywords: footing, tremie, form, exit

DOI:

Date: 9/1/2022

Abstract:

According to Appendix C—Alternative Load and Strength Reduction Factors in ACI 318-11¹ and previous versions, a load combination given by Eq. (C.9-2), U = 0.75(1.4D + 1.7L) + 1.6W, can be used for structures when service-level wind loads are used. Because this appendix was removed from ACI 318-142 and ACI 318-19,³ could these requirements still be used when designing with ACI 318-19?

According to Fig. 1 (Fig. R17.10.5.3 in ACI 318-19¹), grout pad thickness is included when calculating stretch length. Is that correct? If using sleeves, can they be filled with grout? What is the effective depth (h_ef) of an anchor with a sleeve?