专利汇可以提供Prefabricated stair made of steel专利检索,专利查询,专利分析的服务。并且PURPOSE: To reduce weight as strength is ensured, to reduce a cost, and to improve general purpose properties by spanning a stair plate, formed with two members made of thin steel sheet, between strings each formed with horizontal and oblique beam parts made of a thin steel sheet and being of hollow structure.
CONSTITUTION: Strings 2 formed with horizontal beam parts 2A and 2A and an oblique beam part 2B made of a thin steel sheet being of hollow structure having a longitudinally long hollow part (a) are installed in a manner to span between upper and lower stair landings 1. A stair part 4 is formed with a first member 4A made of a thin steel sheet having horizontal and longitudinal plate parts and a second member 4B made of a thin steel sheet having horizontal and riser plate parts. A plurality of stair plates 4 and 4, 4... formed in a rational shape in cross section by using a thin steel sheet having thickness differed according to the frequency of occurrence of wear are spanned between the strings 2 to build a prefabricated stair made of a steel. This constitution ensures high strength as the stair is light.
COPYRIGHT: (C)1991,JPO&Japio,下面是Prefabricated stair made of steel专利的具体信息内容。
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