Fire smoke blocking material, fire smoke interception method, fire resistance partition structure, and its forming method

摘要

To provide a fire smoke cutoff member, a fire smoke cutoff method, a fire-resistant partition structure, and a construction method thereof capable of being easily installed at a wall body position arranged on a lower surface of a flat deck plate and cutting off a hollow part of a reinforcing steel rib arranged in the flat deck plate in a case of fire.SOLUTION: A construction method comprises: forming a cutout C to install a fire smoke cutoff member 100 cutting off a penetration surface of a hollow part 11c in a case of fire at the hollow part 11c of a reinforcing steel rib 11 where a wall body 50 is installed; fixing the fire smoke cutoff member 100 within the hollow part 11c through the cutout C; installing a horizontal member 51 for partitions at a lower surface of a ceiling surface to install the wall body 50; closing an opening formed between the horizontal member 51 for partitions and an irregularity surface of a deck plate 10 with a fire resistance member 60; and fixing the wall body 50 to the horizontal member 51 for partitions.SELECTED DRAWING: Figure 1