Strength and Related Properties of Woods Grown in the United States

Forest Products Laboratory – United States Forest Service – 1935

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“The information given here…is more technical, and may be used not only (1) for comparing species but also (2) for calculating the strength of wood members, (3) for establishing safe working stresses when used in conjunction with other information including results of tests of structural timbers, and (4) for grouping species into classes of approximately like properties for various purposes.”