glued laminated timber glt mass l1masterline glulam beams 20 glulam beam ivey lumber company glulam regular double tapered beams laminated beams rafters timber glued laminated timber puuinfo laminated beam 3 1 2 x 15 3 8 14 ft glulam beams laminated timber beams liimpuit hybrid glulam beam modelling of glulam beams pre stressed shrinkage in deep glu lam to steel glulam glue laminated beams lintels glued laminated timber beams glulam beams frp and steel reinforced glulam beams glued laminated timber beams enercalc version 5 8 non cur glued laminated timber made glued laminated timber beams glued laminated timber beams block glued glulam bridges beams glued laminated timber made concrete composite beams glued laminated timber made glued laminated timber made glued laminated bamboo beams glued laminated timber beams