| 摘要 |
PURPOSE: The prefabricated stairs are provided to shorten a period of construction, to simplify construction work, to reduce the cost required for materials and construction and to easy repair. CONSTITUTION: The prefabricated stairs comprise: many tread bodies(100), as a rectangular frame whose both sides and upper side are opened, provided with one or more finishing plate backing; many stair side plates(200) located/coupled to both sides of the step body(100) and provided with many coupling holes; a pair of stair lateral plates(300) located on both sides of the tread body(100) and coupled with the stair side plate(200); and a finishing plate(400) interposed to the upper part of the tread body(100) to be finished and replaced.
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