PROBLEM TO BE SOLVED: To provide a house, in which an occupied space can be ensured widely so far as possible and an access in the case of movement can be conducted rapidly even in the case of emergency and the normal case, and the house having the degree of freedom which enables field works.;SOLUTION: In the steel two-storied house with the roof floor, the first stair 17 reaching the second floor section B is installed at the central section of the first floor section A and the second stair 31 reaching the roof floor C at the central section of the second section B in a detached steel house with the first floor section A, the second floor section B and the roof floor section C.;COPYRIGHT: (C)2001,JPO
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