Frame strut especially middle strut has wooden core with reinforcement strip, and glass pane

摘要

The frame-strut (10) has a wooden core (12) reinforced by at least one reinforcement (22,18) of composite material preferably extending longitudinally and consisting of a strip parallel with the plane of the glass pane (20) on both sides (14,16) of the supporting core. The composite material consists of fiber reinforced , especially plastic.