TECHNICAL PAPERS
Jul 1, 1986

Static Behavior of Wood‐Joist Floors at Various Limit States

Publication: Journal of Structural Engineering
Volume 112, Issue 7

Abstract

The increased emphasis on limit state design philosophy calls for a corresponding emphasis on the behavior of structural systems up to their ultimate load‐carrying capacities. Fifteen full‐size wood‐joist floors—each having 10 joists—were tested to their ultimate capacities under uniformly distributed loads. Behavior was noted at the design load and at the limit states of first joist rupture and ultimate strength. The general stiffening effect of the sheathing and the two‐way action in each system were compared with the assumed bare‐joist behavior at the design load level. Loads at first joist rupture ranged form 101–228 psf. The ultimate limit state was defined as the highest uniform load that could be applied over the entire floor surface, and magnitudes ranged from 135–383 psf. The mode of failure at the ultimate limit state appeared to depend on the rate of loading.

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References

1.
Atherton, G., “Ultimate Strength and Stiffness of Two Residential Floors,” Forest Research Laboratory, Oregon State Univ., Corvallis, Oreg., 1963.
2.
“Design Values for Wood Construction,” National Forest Products Association, Mar., 1982.
3.
McCutcheon, W. J., “Method for Predicting the Stiffness of Wood‐Joist Floor Systems with Partial Composite Action,” USDA Forest Service Research Paper FPL 289, Madison, Wis., 1977.
4.
“National Design Specification for Wood Construction,” National Forest Products Association, 1982 ed.
5.
“Performance of Glued Single‐Layer Ply wood‐to‐Wood Joist Floor Systems,” National Association of Home Builders Research Foundation, Inc., Rockville, Md., June, 1971.
6.
“Plywood Design Specification,” American Plywood Association, Nov., 1980.
7.
Shock, D. C., “Experimental Behavior of Wood‐Joist Floors Loaded to Capacity,” thesis presented to the University of Texas, at Austin, Tex., in 1984, in partial fulfillment of the requirements for the degree of Master of Science.
8.
“Static and Dynamic Performance of a Minimum Wood Joist Floor Construction,” National Association of Home Builders Research Foundation, Inc., prepared for the National Forest Products Association, Rockville, Md., July, 1976.
9.
Wheat, D. L., “Nonlinear Analysis of Wood‐Joist Floors,” dissertation presented to Colorado State University, in 1980, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
10.
Wheat, D. L., and Moody, R. C., “Predicting the Strength of Wood‐Joist Floors,” Research Paper FPL 445, USDA Forest Service, Forest Products Laboratory, Apr., 1984.
11.
Wheat, D. L., Shock, D. C., and Wolf, L. M., “Nail Slip in Wood‐Joist Floors,” Forest Products Journal (accepted for publication).
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Zahn, J. J., “Strength of Multiple‐Member Structures,” Research Paper FPL 139, USDA Forest Service, Forest Products Laboratory, July, 1970.

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Published In

Go to Journal of Structural Engineering
Journal of Structural Engineering
Volume 112Issue 7July 1986
Pages: 1677 - 1691

History

Published online: Jul 1, 1986
Published in print: Jul 1986

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Authors

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Dan L. Wheat
Asst. Prof. of Civ. Engrg., Univ. of Texas at Austin, Austin, TX 78712
David S. Gromala
Engr., Trus Joist Corp., Lowndes County Plant, Valdosta, GA 31603
Russell C. Moody, Members ASCE
Proj. Leader, Engineered Wood Structures, U.S. Forest Products Lab., P.O. Box 5130, Madison, WI 53705

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