Multiple support wall structure

A multiple support wall structure (A), wherein a center support member (5) is disposed at a center, intermediate reinforcing plates (2) are disposed over and under the center support member (5), respectively, and finish plates (3) are disposed over and under the intermediate reinforcing plate (2), respectively,

• top rectangular grooves (50) recessed downward to insert downward projective insertions (22′) on a bottom of the intermediate reinforcing plate (2) over the center support member (5) are formed on a top of the center support member (5), while bottom rectangular grooves (50′) recessed upward to insert upward projective insertions (22) on a top of the intermediate reinforcing plate (2) under the center support member (5) are formed on a bottom of the center support member (5), so the center support member (5) has a double-fitting structure with the top rectangular grooves (50) and the bottom rectangular grooves (50′) arranged in opposite directions,
• the top rectangular grooves (50) of the center support member (5) each have a cross groove (51) at a center, a cross projection (52) protruding diagonally upward from the cross groove (51), and slopes (53) extending from the cross groove (51) to the cross projection (52), while the bottom rectangular grooves (50′) of the center support member (5) each have a cross groove (51′) at the center, a cross projection (52′) protruding diagonally downward from the cross groove (51′), and slopes (53′) extending from the cross groove (51′) to the cross projection (52′),
• in the intermediate reinforcing plates (2), the upward and downward projective insertions (22, 22′) protruding to correspond to the rectangular grooves (50) are formed, top and bottom grooves (21, 21′) for fitting the cross projections (52) are formed laterally and longitudinally between the upward and downward projective insertions (22, 22′), a flat cross projection (23) is formed on tops of the upward and downward protective insertions (22, 22′), slopes (24) inclined toward edges are formed at sides of the flat cross projections (23), a plurality of slopes (24) inclined upward is formed at the upward projective insertions (22), four outer sides (25) around the upward projective insertions (22) are formed in a diamond shape, and the downward projective insertions (22′) are formed diagonally from the upward projective insertions (22) in the same shape as but in an opposite direction to the upward projective insertions (22),
• the finish plates (3) are bonded to the multiple support wall structure by being fixed to the flat cross projections (23, 23′) of the intermediate reinforcing plates (2).