To enable enlargement of a house with the width increased within the limits of a prescribed design weight and, moreover, to enable further widening of the use of the house by partitioning the inside into a large number of deep small spaces.

In a framed structure wherein ridge-beam air tubes 2 and pole-plate air tubes 3 are provided horizontally between a plurality of reverse-U-shaped longitudinal air tubes 1 erected and provided at prescribed intervals, studs 4a and 4b supporting beam parts of the longitudinal air tubes 1 and constituted of straight and long air tubes are provided in erection at laterally symmetric positions of the beam parts. Thereby the inclination of the beam parts of the longitudinal air tubes are made gentle and spaces between pole parts are widened, with the strength of the beam parts maintained, so that the width be enlarged within the limits of a prescribed design weight. Partition walls are provided removably between the studs in the direction of the length to form a central passage 7 in the direction of the length by partitioning, and in each of parted spaces on the front and rear sides of the central passage 7, a parting wall is provided removably between each of the studs 4a and 4b and a support part and thereby small rooms divided as a large number of consecutive small spaces can be formed.