Strength of Old Wood Joists

by Ross M. Lanius, Jr., (F.ASCE), Assoc. Prof.; Dept. of Civ. and Environmental Engrg., Univ. of New Haven, W. Haven, Conn.,
William M. Bulleit, Struc. Engr.; Howard, Needles, Tammen, & Bergendoff, Bellevue, Wash.,
Robert Tichy, (A.M.ASCE), Manager; Engrg. Research and Development, Western Wood Products Associate, Portland, Oreg.,

Serial Information: Journal of the Structural Division, 1981, Vol. 107, Issue 12, Pg. 2349-2363

Document Type: Journal Paper

Abstract: Two nondestructive techniques are used to evaluate the strength of wood joists in an existing structure. The traditional visual grading and longitudinal stress wave approaches are employed, with the latter technique providing better insight into the strength of the floor system. Further refinements of the stress wave method are suggested.

Subject Headings: Stress waves | Strength of materials | Wood structures | Joists | Structural strength | Existing buildings | Long waves | Floors |

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