SIS SS-EN 74-1991 用于工作棚架和脚手架钢管制成的车钩，松阀门和底板．要求和测试程序

标准号：SIS SS-EN 74-1991
中文标准名称：用于工作棚架和脚手架钢管制成的车钩，松阀门和底板．要求和测试程序
英文标准名称：Couplers, loose spigots and baseplates for usein working scaffolds and falsework ma- de of steel tubes — Requirements and test procedures
发布日期：1991/4/24 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This European Standard specifies the requirements for materials and design, and test procedures and methods, for couplers, loose spigots and base-plates used for connecting steel tubes of 48,3 mm outside diameter and of at least 3,2 mm nominal wall thickness at a minimum in the construction of working scaffolds and falsework required for the construction, maintenance, repair and demolition of buildings and structures.The requirements and test procedures specified are for the assessment of prototypes1> of these couplers, loose spigots and base-plates2).When no alteration has been made to the design, material or surface treatment of a type of coupler which has been approved as a prototype according to this European Standard, the assessment of subsequent production is made by comparison with the requirements given in this European Standard.