| 摘要 |
According to an embodiment, the present invention is to provide a fireproof cover technology for a structure, which can improve fire resisting capacity for the structure which is reinforced since a steel formwork is installed in the lower part of a slab without an external support member using a fire resisting structure of the structure and bubble concrete with low specific gravity and heat conductivity is put from the upper surface of the slab into the steel formwork through an injection hole. Through-holes (13) for mounting are formed at a mounting recess (12), which is formed at an upper surface of a slab (11) at an end of a beam (10), with a predetermined interval, wherein the through holes pass through the slab at both sides of the beam, respectively. A steel plate (18) is installed at a lower surface of the mounting recess (12), and each eye-bolt (15) including a bolt part (15a) and a ring-shape head part (15b) is inserted into each through-hole (13) for mounting so that the bolt part (15a) protrudes from an upper part of the mounting recess (12), and the ring-shape head part (15b) is installed at a lower part of the slab. Also, the bolt part (15a) is inserted into each through hole formed in the steel plate (18) with a predetermined interval and is fastened by a nut (16). Each eye-bolt (15) is fastened to a connection steel fittings (21), which is coupled, with a predetermined interval, to the upper part of the inside of a vertical plate (19b) of a steel formwork (19) with a U-shape and a predetermined length, which surrounds a lower part and a side part of an end of the beam (10). An upper end of the steel plate formwork (19) having a U-shape makes close contact with a lower surface of the slab by rotation of the nut (16) fastened to each bolt part (15a). |
