Mechanical Properties of Visually Graded Lumber. Volume 6. Eastern Hemlock, Eastern Spruces, Eastern White Pine, Engelmann Spruce, Idaho White Pine, Jack Pine, Lodgepole Pine

摘要

The document presents tables that summarize the data obtained on the mechanical properties of Eastern Hemlock, Eastern Spruces, Eastern White Pine, Engelmann Spruce, Idaho White Pine, Jack Pine, and Lodgepole Pine 2-inch dimension lumber sampled in the in-Grade testing program conducted in the United States. The tables summarize the data for strength in bending, tension parallel to the grain, and compression parallel to the grain and flexural modulus of elasticity. Flexural stiffness, moment capacity and tensile load capacity are also presented. Summaries are provided for these properties after adjustment to 73 degrees F and moisture contents of 12 percent (assumed 15 percent maximum). Summaries include both parametric (two- and three-parameter Weibull, normal and lognormal) and nonparametric estimates.