Composite panel for preventing spread of fire

A unit wall coupling structure for installing a composite panel on an exterior wall in the absence of a retaining wall, the structure comprising:

• a wall structure part including a wall and a fire-resistant board;
• a vertical-horizontal frame structure spaced apart from the wall so as to define a gap therebetween, the vertical-horizontal frame structure including:
• a vertical bar;
• and
• a horizontal bar connected to the vertical bar;
• an insulation panel unit member coupled to the horizontal bar, the insulation panel unit member including:
• an insulation material;
• a mortar layer covering an exterior of the insulation material;
• and
• an ultra-slim stone panel bonded to the mortar layer;
• a panel fixing angle member coupling the insulation panel unit member to the horizontal bar;
• and
• a wall vertical connection member fixing the vertical bar to the wall,
• wherein the vertical bar comprises:
• an upper vertical bar;
• and
• a lower vertical bar,
• and an expansion joint is disposed between the upper vertical bar and the lower vertical bar,
• wherein
• an upper portion of the expansion joint is fastened to both sides of the upper vertical bar by vertical bar connecting bolts, and
• a lower portion of the expansion joint is fixed to both sides of the lower vertical bar by welding,
• wherein the horizontal bar comprises:
• an upper horizontal bar connected to the upper vertical bar;
• and
• a lower horizontal bar connected to the lower vertical bar
• and the upper horizontal bar and the lower horizontal bar are coupled to the insulation panel unit member by:
• a “U”-shaped upper fastener and a “U”-shaped lower fastener,
• wherein
• the “U”-shaped upper fastener is coupled to a first “L”-shaped angle member, one end of the first “L”-shaped angle member being welded to a lower end of the upper horizontal bar and another end being fastened to the “U”-shaped upper fastener by a bolt and a nut, and
• the “U”-shaped lower fastener is coupled to a second “L”-shaped angle member, one end of the second “L”-shaped angle member being welded to an upper end of the lower horizontal bar and another end being fastened to the “U”-shaped lower fastener by a bolt and a nut.