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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


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Title: Distribution of wheel loads on timber bridges

Source: Res. Paper FPL-RP-44. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory: 1-67.

Author(s): Erickson, E. C.O.; Romstad, K.M.

Publication Year: 1965  View PDF »

Category: Research Papers

Abstract: The results obtained in field tests of five typical forest-road bridges and in U.S. Forest Products Laboratory tests of three full-size bridge decks are presented and their performance is compared with design requirements and with a theoretical analysis. Design recommendations are given confirming present design practice when wheel loads are in position for maximum bending moment in the stringers, but showing a greater distribution of loads than is now assumed when loads are in position for maximum shear. Excellent agreement was noted between experimental and theoretical results for the 6-, 7-, and 12-stringer decks constructed at the U.S. Forest Products Laboratory. By theoretical computations, the reaction for load in position for maximum moment (in all three superstructures) did not exceed 25 percent of the wheel load, nor exceed 41 percent of the wheel load for loads Positioned 3 feet from the reaction.

Publication Review Process: Non-Refereed (Other)

File size: 13,312 kb(s)

Date posted: 10/02/2018
RITS Product ID: 92894

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