| Steel-structured residential housing is environment-friendly and meets the requirement for a sustained development. Furthermore, it's easier for the process of Industrialization production standardization and Installation. It's an ideal residential construction system for modernizing our housing Industry. Meantime, developing steel ?structured residential housing can promote the developments of building material Industry, Steel Industry, chemical Industry, mechanical Industry and so on. It can also increase our GDP. Developing steel ?structured residential housing accords with our housing Industry policy.Assemblage and large bay are the embodiment of the advantage of Steel-structured residential housing. But the conventional floor system can not match it preferable. It is necessary to research new floor system to suit to the development of the Steel-structured residential housing.Shanxi province is an important energy base in China, whichoccupied large coal reserve. A lot of coal gangue is emerged along with the development of coal and electric power enterprise, which not only encroach a large number of lands, but also pollute environment.Based on the above, the paper brings forth a new coal gangue light-weight aggregate concrete floor system, gives any different floor systems according to different post-and-beam framing by means of a large number of calculations and comparisons, and provides technical and economic target, which is reference to engineers and technicians.
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