TBGL: the Tribeam-Glulam bracket is a hybrid of the GLGL and KBGL brackets, allowing treehouse builders to construct large tribeams (“Tri-Lams”) with engineered timbers as horizontal members, supporting longer beams perpendicular to the tribeam. When used in combination with the GLGL and KBGL brackets, the TBGL can be used to connect perpendicular beams to the face of the Tri-Lam. .1/4" Steel Plate