TECHNICAL PAPERS
Dec 1, 1983

Load Capacity of Row of Shear Late Connectors

Publication: Journal of Structural Engineering
Volume 109, Issue 12

Abstract

Based on 69 tests, recommendations are made for immediate revision o design standards and necessary additional research on timber connectors. he mean safety factor for four‐connector joints is alarmingly low at .88 for the first series of 34 specimens and increases to 1.21 for the 20 tests of he second series from a new shipment of billets. The mean safety factor for 5 three‐connector tests is 1.06. Tensile strengths perpendicular to the glueline re reported and compared with tests reported in 1975. The strength of the test aterial is about 1/3 to 1/2 of that expected. The low safety factors are attributed o a combination of the poor distribution of loads among connectors and he low perpendicular to glueline tensile strength. A finite element stress analysis n single connector joints is used to investigate the effect of varying end istances.

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References

1.
“Code for Engineering Design of Wood,” CAN3‐086 M80, National Standard of Canada, 1980.
2.
Cramer, C. O., “Load Distribution in Multiple‐Bolt Tension Joints,” Journal of the Structural Division, ASCE, Vol. 94, No. ST5, Proc. Paper 5939, May, 1968, pp. 1101–1117.
3.
Dannenberg, L. J., and Sexsmith, R. G., “Shear Plate Load Distribution in aminated Timber Joints,” Report No. 361, School of Civil and Environmental ngineering, Cornell University, Ithaca, N.Y., July, 1976.
4.
Doyle, D. V., McBurney, K. S., and Drow, J. T., “The Elastic Properties of ood,” U.S. Forest Products Laboratory, No. 1528‐E, U.S. Department of Agriculture, adison, Wisc., 1946.
5.
Erki, M‐A., “Load Capacity and Distribution in a Row of Shear Plate Connectors,” thesis presented to the University of Toronto, at Toronto, Canada, n 1982, in partial fulfillment of the requirements for the degree of Master of Applied Science.
6.
Fox, S. P., “Strength and Stiffness of Laminated Douglas Fir Blocks in Perpendicular‐to‐Glueline Tension,” Wood and Fiber, Vol. 6, No. 2, Summer, 1974.
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Isyumov, N., “Load Distribution in Multiple Shear Plate Joints in Timber,” Department of Forestry, Publication No. 1203, Ottawa, Canada, 1967.
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Lantos, G., “Load Distribution in a Row of Fasteners Subjected to a Lateral Load,” Wood Science, Vol. 1, No. 3, Jan., 1969.
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“National Design Specification for Wood Construction,” National Forest roducts Association, Washington, D.C., 1977.
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Scholten, J. A., “Timber‐Connector Joints: Their Strength and Design,” U.S. Department of Agriculture, Technical Bulletin No. 865, Washington, D.C., Mar., 944.
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Wilkinson, T. L., “Assessment of Modification Factors for a Row of Bolt or imber Connections,” U.S. Forest Products Laboratory, FPL 376, U.S. Department f Agriculture, Madison, Wisc., Dec., 1980.
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Wilkinson, T. L., and Rowlands, R. E., “Influence of the Elastic Properties on the Stresses in Bolted Wood Joints,” Wood Science, Vol. 14, No. 1, July, 1981.
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Go to Journal of Structural Engineering
Journal of Structural Engineering
Volume 109Issue 12December 1983
Pages: 2786 - 2801

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Published online: Dec 1, 1983
Published in print: Dec 1983

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Authors

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Marie‐Anne Erki
Grad. Student, Dept. of Civ. Engrg., Univ. of Toronto
Mark W. Huggins, F. ASCE
Prof. Emeritus of Civ. Engrg., Univ. of Toronto

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