FIRE-RESISTING STRUCTURE FOR BASE ISOLATOR

PROBLEM TO BE SOLVED: To provide a fire resisting structure for a base isolator formed of a plurality of base isolation members, wherein the base isolation members are set up according to systematic fire resisting technique. SOLUTION: According to the fire resisting structure, a laminated rubber base isolation member 20 is interposed between a lower column section 10a and an upper column section 10b, and the fire resisting member 14 is erected from the lower column section 10a in a manner enclosing the rubber laminated base isolation member 20. Further an inter-column base isolation slit 15 is formed between an upper edge of the fire resisting member 14 and the upper column section 10b. In the same manner a fire resisting wall 30 such as an outer wall on the periphery of the columns, is formed of a lower wall section 30a and an upper wall section 30b, and an inter-wall base isolation slit 31 is formed between the wall sections. Further the same slit joint member 50 is inserted into each of the inter-column base isolation slit 15 and the inter-wall base isolation slit 31. COPYRIGHT: (C)2005,JPO&NCIPI