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:
10.14359/51737207
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 (hef) of an anchor with a sleeve?
Related References:
1. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary,” American Concrete Institute, Farmington Hills, MI, 2011, 503 pp.
2. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14),” American Concrete Institute, Farmington Hills, MI, 2014, 519 pp.
3. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19),” American Concrete Institute, Farmington Hills, MI, 2019, 623 pp.
4. ASCE 7-02, “Minimum Design Loads for Buildings and Other Structures,” American Society of Civil Engineers (ASCE), Reston, VA, 2002, 376 pp.
5. ASCE/SEI 7-10, “Minimum Design Loads for Buildings and Other Structures,” American Society of Civil Engineers (ASCE), Reston, VA, 2010, 657 pp.
6. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19),” American Concrete Institute, Farmington Hills, MI, 2019, 623 pp.