FIREPROOF WATER STORAGE TANK MANHOLE IRON COVER AND FRAME

摘要

PROBLEM TO BE SOLVED: To prevent an accident such as a cover of a manhole of a fireproof water storage tank is removed or lifted by swinging when an earthquake occurs, by integrating the cover of the manhole of the fireproof water storage tank and a frame.;SOLUTION: A structure and the function are imparted for preventing a secondary disaster such as an injury and a material damaged accident even in an earthquake and a fire, by lightly opening-closing and locking the cover by oneself.;COPYRIGHT: (C)2006,JPO&NCIPI