| 摘要 |
PURPOSE: The prefabricated stairs are provided to cut down manufacturing costs by increasing strength and shortening a period of construction. CONSTITUTION: The prefabricated stairs contain: a concrete stair panel(10) composed of a horizontal thread and a vertical riser, and provided with a nut member exposed upward and a steel fiber buried inward; a pair of inclined side plates(40) provided with a bolt hole formed correspondingly to the nut member; and a sealing member(50) interposed between the stair panel(10) and the inclined side plate(40), wherein the stair panel(10) is connected on both inclined side plates(40) by bolting.
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