InTrans / Aug 14, 2018
The performance of glued laminated beams manufactured from machine stress graded norwegian spruce
This study focuses on the characterization of machine stress graded Norwegian spruce laminating lumber and glued-laminated (glulam) timber beams in comparison to CEN standards. Material property testing indicated that the supplied laminating lumber can be represented by two CEN strength classes, C37-14E and C30-12E, with 48% and 50% yield, respectively. Beams constructed from these established grades exhibited strength and stiffness meeting the requirements of CEN combinations LH35, LH40, and LC38. computed laminating factors, klam, were found to be in the range of 1.05 to 1.15 and are in close agreement with the assumed values of the CEN standards.