TECHNICAL PAPERS
Feb 1, 1998

Investigating the Adequacy of Vertical Design Loads for Shoring

Publication: Journal of Performance of Constructed Facilities
Volume 12, Issue 1

Abstract

In contrast to design of structures for their service life, very little information is provided to the engineer for selecting appropriate design loads for construction. Before new design loads or load combinations can be recommended or existing recommended values modified, the adequacy of current design loads for construction must be evaluated. This can be accomplished only by comparing actual load data with design loads prescribed by available standards. This paper presents the results of one such study to investigate the adequacy of current construction load provisions in the context of vertical loads on shores during reinforced concrete construction. Construction load provisions from ACI 347, the OSHA standard, ANSI A10.9, and the proposed ASCE construction load standard are first reviewed. Design loads recommended by available standards are evaluated and compared with actual (measured) axial shore loads. Shore load data from six sites are considered, including two recently instrumented projects and four multistory buildings studied previously.

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References

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Agarwal, R. K., and Gardner, N. J.(1974). “Form and shore requirements for multistory flat slab type buildings.”ACI J., 77(11), 559–569.
2.
American Concrete Institute (ACI). (1994). Guide to formwork for concrete. ACI Committee 347, American Concrete Institute, Detroit, Mich.
3.
American National Standards Institute (ANSI). (1995). “American national standards for construction and demolition operations: concrete and masonry work—safety requirements,”ANSI Standard A10.9, American National Standards Institute, New York, N.Y.
4.
Ayoub, S., and Karshenas, H.(1994). “Survey results for concrete construction live loads on newly poured slabs.”J. Struct. Engrg., ASCE, 120(5), 1543–1562.
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“Design loads on structures during construction.” (1996b). Ballot Draft, ASCE, New York, N.Y.
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Fattal, S. G. (1983). “Evaluation of construction loads in multistory buildings.”NBS BSS-146, National Bureau of Standards, Washington, D.C.
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Huston, D. R., Fuhr, P. L., and Willsey, J. (1996a). “Field and laboratory measurements of shoring loads.”Proc., ASCE Struct. Congr., Chicago, Ill., ASCE, New York, N.Y.
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Huston, D. R., Rosowsky, D. V., Fuhr, P. L., and Chen, W. F. (1996b). “Load monitoring and hazard warning systems for buildings under construction.”Proc., SPIE Symp. on Smart Struct. and Mat., San Diego, Calif., Int. Soc. for Optical Engrg., Bellingham, Wash.
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Kothekar, A. V. (1996). “Analysis of vertical loads on shoring during concrete construction,” MS thesis, Clemson University, Clemson, S.C.
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Occupational Safety and Health Administration (OSHA) (1993). “Occupational safety and health standards for the construction industry.”29 CFR Part 1926, OSHA, Department of Labor, Washington, D.C.
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Rosowsky, D. V., Philbrick, T. W., and Huston, D. R.(1997). “Observations from shore load measurements during concrete construction.”J. Performance of Constructed Facilities, ASCE, 11(1), 18–23.

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Go to Journal of Performance of Constructed Facilities
Journal of Performance of Constructed Facilities
Volume 12Issue 1February 1998
Pages: 41 - 47

History

Published online: Feb 1, 1998
Published in print: Feb 1998

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Authors

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A. V. Kothekar
Grad. Res. Asst., Dept. of Civ. Engrg., Clemson Univ., Clemson, SC 29634-0911.
D. V. Rosowsky, Associate Member, ASCE,
Assoc. Prof., Dept. of Civ. Engrg., Clemson Univ., Clemson, SC.
D. R. Huston, Associate Member, ASCE
Assoc. Prof., Dept. of Mech. Engrg., Univ. of Vermont, Burlington, VT 05405.

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