ASSEMBLING BEAM FOR CONVENIENTLY ASSEMBLING BY FORMING COMBINATION PORTIONS TO BE ALTERNATIVELY FORMED PROTRUDED PORTIONS AND DEPRESSED PORTIONS

摘要

PURPOSE: A beam is provided to combine the beams without an additional combining device, to combine quickly and to improve the intensity of the combined portion. CONSTITUTION: In combination portions, protruded portions and depressed portions are formed alternatively. Beams are quickly combined in an empty square shape without additional combining device by inserting the combination portions each other. The combination portion is a wave shape. The combination portions are formed to repeat trapezoids in opposite directions continuously. The stability and the intensity of the beams are reinforced by folding sharp edges inward or outward. The beams are combined without an additional combining device quickly.