a first and a second lateral edge not shown and a superior and an inferior edge 7 8 and composed by a plurality of quadrangular sections 9 each one lodged inside a cell 4 and a first 10 and a second 11 layer surrounding the plurality of quadrangular sections 9 and the metallic structure a first u201c f u201d and a second u201c s u201d external quadrangular cardboard cover covering the first 10 and second 11 layer respectively and joined thereof by means of an adherent substance each external quadrangular cardboard cover u201c f u201d u201c s u201d formed by a plurality of sandwiched cardboard sheets joined together by means of an adherent substance a fire proof and water resistant layer surrounding the entire wall panel having a textured finish in a preferred embodiment the panel width is 2 u2033 and its total area is 0 90 u00d7 1 25 mts furthermore in said preferred embodiment there are two vertical 13 and horizontal 14 rods forming nine cells per panel the ends of each vertical 13 and horizontal 14 rod project out of the wall panel and serve as means for linking the wall panel to other wall panels or directly to other structure such as a headframe by means of anchors or welding for example the fire proof and water resistant layer 12 provides additional rigidity to the panel and at the.