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  1. Bending strength of shallow glued-laminated beams of a uniform grade

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    Author(s): Catherine M. Marx; Russell C. Moody
    Date: 1981
    Source: Res. Pap. FPL-380. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 1981: 19 pages
    Publication Series: Research Paper (RP)
    Station: Forest Products Laboratory
    DOI: https://doi.org/10.2737/FPL-RP-380
    PDF: Download Publication  (379 KB)

    Description

    Ninety glued-laminated Douglas-fir or southern pine beams of a uniform grade with 2-, 4-, or 6-laminations were evaluated in static bending tests. No specially graded tension laminations or end joints were used. The purpose of the tests was to determine which of three present design criteria best predict near minimum bending strength values for shallow glued-laminated (glulam) beams. A variation of a strength ratio concept, with an applied adjustment factor of 0.85, was found to predict the near- minimum strengths more accurately than the IK/IG concept now used for deep beams. Because a new method for determining appropriate design stresses for shallow beams was developed, results will be useful to industry committees establishing specifications.

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    Citation

    Marx, Catherine M.; Moody, Russell C. 1981. Bending strength of shallow glued-laminated beams of a uniform grade. Res. Pap. FPL-380. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 1981: 19 pages

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    Keywords

    Glued-laminated beams, bending strength, glulam beams, static bending tests

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