ELECTROMAGNETIC SHIELDING BY COMBINED USE OF FIREPROOFING WALL AND FLOOR SLAB

PURPOSE:To hold excellent electromagnetic shielding capacity in addition to fireproofing performance by adhering metal meshes to both side surfaces of a base wall material and forming a wall for surrounding the core of a building or a partition wall of a resident space of a fireproofing wall formed by spraying fireproofing coating such as rock wool, etc., of a predetermined thickness thereon. CONSTITUTION:When a lower floor slab 10 is installed, a mesh 15 electrically connected at one end to a deck plate 6 is exposed through concrete 5, a base board 13 of a wall is placed thereon, and engaged. The meshes 15 are adhered to both side surfaces of the board 13, and meshes 14 are connected to the meshes 15 exposed from the concrete 15. On the other hand, the deck plate 6 of upper floor slab 10 and the meshes 14 are connected in contact with another mesh 16. It is sprayed with fireproofing coating 17 such as rock wool as thick as a predetermined one to block the electromagnetic gap of parts 11 and 12 to be electromagnetically shielded at a floor and ceiling with the plates 6, 6, thereby shielding the wall by a fireproofing wall 8.