The specific gravity of this material can be calculated from the “oven-dry” and “green” forms of its weight. The relative orientations of layers of this material differentiate (0[1])glulam from the “cross-laminated” form of this material. (20[2])The indentation (0[1])hardness of this material is measured with a steel ball in a test developed by Gabriel Janka (“JAN-kuh”). Mjøstårnet (20[1])exemplifies (0[1])a recent (20[1])trend to build (*) skyscrapers from the “mass” form of this material. (10[1])Oriented strand board and particle board (10[1])exemplify (10[2])the “engineered” (10[1])type (10[1])of this (10[2])material. (10[1])This material’s tensile (10[1])strength is reduced (10[1])at circular imperfections called knots (10[2]0[1])that (10[1])interrupt the (10[1])direction (10[1])of its grain. (10[2]0[1])For 10 (10[1])points, (10[1]0[1])name this material exemplified (10[2])by balsa (10[1])and mahogany. (10[2])■END■ (10[6])