A Note on Load Duration of Douglas-Fir 2 by 4s Under Repeated Loads

Authors

  • C. C. Gerhards

Keywords:

Repeated loads, sustained constant loads, bending, static strength, time, Douglas-fir, lumber, stress level

Abstract

Douglas-fir specimens matched to specimens previously tested under sustained constant bending loads were subjected to two different repeated load cycle tests to evaluate the effect of repeated bending loads on load duration of lumber. There was no clear evidence that repeated loading gave different results than sustained constant loading.

References

Gerhards, C. C. 1988. Effect of grade on load duration of Douglas-fir lumber in bending. Wood Fiber Sci. 20(1): 146-161.nYoungs, R. L., and H. C. Hilbrand. 1963. Time-related flexural behavior of small Douglas-fir beams under prolonged loading. Forest Prod. J. 13(6):227-232.n

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Published

2007-06-22

Issue

Number 3 / July 1988

Section

Research Contributions

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