IMPROVED PANEL UNIT

摘要

A building panel having substantially quadrilateral shape wherein two edge surfaces have tongue members (4, 5) and two edge surfaces have groove members (2, 3). Preferably, the edge surfaces with tongues are adjacent surfaces and the edge surfaces with grooves are adjacent surfaces. Preferably, the panel is a laminate having a core (8) of insulating material laminated on both sides with metallic skins (7). Walls constructed from such panels have reduced fire hazards.