Efficient Utilization Of Red Maple Lumber In Glued Laminated Timber Beams PDF Download

Evaluation of 120 glued laminated (glulam) beams provided criteria for improved utilization of lumber in such beams. Objectives were: (1) to determine if lumber grade can be somewhat reduced on the compression side of beams without significantly changing design strength; (2) to establish analytic procedures for incorporating lumber having had its modulus of elasticity (e) determined (E-rated lumber) into glulam beams; and (3) to determine the effect on beam properties of using lumber with limited wane. The procedures developed will provide those preparing specifications a wider raw material base for glulam timber, resulting in more efficient use of our timber resource.