Tensile strength of lumber laminated from 1/8-inch-thick veneers
U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1972 - Crafts & Hobbies - 28 pages
An investigation of tensile strength of structural-sized lumber laminated from thin, relatively low-grade butt-jointed veneers is reported. (Author).
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1:3 sloped butt 21 Douglas-fir 4's averaged adjacent plies Average knot average tensile strength Average:C.O.V. bending tests butt-jointed outer plies BUTT-JOINTED VENEERS calculated CD CD CN CN CN CN o o o coefficient of variation control specimens Douglas-fir and southern Douglas-fir specimens Douglas-fir veneer end joint failure location Forest Prod glued laminated glued laminated timber Grade C veneer grips High High high-line Grade high-line veneer higher indicated that butt inner ply interior plies joint regions knot data knot density knotty low-line veneer maximum knot ratio midlength midspan modulus of elasticity modulus of rupture moisture content outer two plies randomly laid-up Results scarf scarf-jointed outer plies sheet of veneer shown in figure simple butt joints sloped butt joints southern pine specimens southern pine veneer species specific gravity specimens with simple Standard grading strength of control stress concentration structural lumber tension tests U.S. Forest Serv