Metal wall material and wall construction method using same

Abstract

A metal wall material 1 according to the present invention comprises: a front substrate 10 made of a metal sheet, the front substrate 10 comprising a body portion 100 formed into a box shape; a back substrate 11 arranged on a back side of the front substrate 10 so as to cover an opening of the body portion 100; and a core material 12 filled between the body portion 100 and the back substrate 11, the metal wall material 1 being tightened to a wall base by driving at least one tightening member into the body portion 100, wherein a top plate portion 101 of the body portion 100 comprises at least one protruding rib 3 comprised of at least one protrusion 30 disposed along a side of a polygon or along a circle, and wherein the metal wall material 1 is configured such that the tightening member is driven into an inner region 3a of the protruding rib 3.

1 . A metal wall material comprising:
 a front substrate made of a metal sheet, the front substrate comprising a body portion formed into a box shape;   a back substrate arranged on a back side of the front substrate so as to cover an opening of the body portion; and   a core material filled between the body portion and the back substrate, the metal wall material being tightened to a wall base by driving at least one tightening member into the body portion,   wherein a top plate portion of the body portion comprises a protruding rib comprised of at least one protrusion disposed along a side of a polygon or along a circle, and wherein the metal wall material is configured such that the tightening member is driven into an inner region of the protruding rib.   
     
     
         2 . The metal wall material according to  claim 1 , wherein the protruding rib comprises at least one opening portion that communicates an outer region with the inner region of the protruding rib. 
     
     
         3 . The metal wall material according to  claim 2 , wherein the at least one opening portion includes a lower side opening portion located on a lower side of the protruding rib when the metal wall material is disposed on the wall base. 
     
     
         4 . The metal wall material according to  claim 2 , wherein a ratio of the opening portions in the protruding rib is 50% or less. 
     
     
         5 . The metal wall material according to  claim 1 , wherein the protrusion has a height of 0.2 mm or more. 
     
     
         6 . The metal wall material according to  claim 5 , wherein a value obtained by dividing a width of the protrusion by the height of the protrusion is 3 or more. 
     
     
         7 . The metal wall material according to  claim 1 , wherein a shortest distance from a center position of the inner region to the protrusion is 5 mm or more and 20 mm or less. 
     
     
         8 . The metal wall material according to  claim 1 , wherein the metal sheet forming the front substrate has a thickness of 0.5 mm or less. 
     
     
         9 . A wall construction method using a metal wall material comprising: a front substrate made of a metal sheet, the front substrate comprising a body portion formed into a box shape; a back substrate arranged on a back side of the front substrate so as to cover an opening of the body portion; and a core material filled between the body portion and the back substrate, a top plate portion of the body portion comprising a protruding rib comprised of at least one protrusion disposed along a side of a polygon or along a circle, the wall construction method comprising the steps of:
 placing the metal wall material on a wall base; and   driving at least one tightening member into an inner region of the protruding rib to tighten the metal wall material to the wall base.