Test were made to determine if the existing theory for curved members applied to a large glued-laminated wood ring load along a diameter. A trial southern pine ring and a white oak ring were fabricated. The rings were tested by compressive loading along a diameter, and the vertical deflection, the horizontal deflection, and the strain in the outer fiber at various locations were measured. The compressive loads imposed bending stresses to approximately the proportional limit.nThe rings were cut into quadrants and tested as curved beams. The modulus of rupture were determined, and outer fiber strain data were obtained.
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