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主梁上拱度是桥(门)式起重机的重要技术指标。GB/T 14405—93《通用桥式起重机》和GB/T14406—93《通用门式起重机》规定:新出厂的桥(门)式起重机的主梁应有上拱,跨中上拱度应为(0.9/1000~1.4/1000)S,且最大上拱度应控制在跨中S/10的范围内(S为起重机的跨度)。《起重机械监督检验规程》(以下简称检规)附录3在验收检验和定期检验报告中均有主梁上拱度和上翘度的检验项目。但在附录2桥架型起重机的检验内容和要求中仅对新安装和载荷试验后(即验收检验)桥(门)式起重机上拱度规定了合格判定的标准。而对于在用桥(门)式起重机上拱度的合格判定,检规和国家标准均无明确规定。本文予以探讨,提出在用桥(门)式起重机上拱度的合格(或应修)判定方法。1在用桥(门)式起重机主梁变形(上拱度减
The girder camber is an important technical indicator of the bridge (door) crane. GB / T 14405-93 “Universal Gantry Crane” and GB / T14406-93 “Universal Gantry Crane” stipulates: The new factory bridge (Gantry) crane girder should be arched, mid-span should be (0.9 / 1000 ~ 1.4 / 1000) S, and the maximum camber should be controlled within the span of S / 10 (S is the span of the crane). “Crane Supervision and Inspection Procedures” (hereinafter referred to as the inspection) Appendix 3 in the inspection and inspection reports are regular inspection of the main beam camber and uplift test items. However, in the inspection contents and requirements of the overhead cranes of Appendix 2, the standards for passing the test are specified only for the camber of bridge (portal) cranes after new installation and load test (ie acceptance inspection). As for the use of bridge (door) crane cambered qualified judgments, regulations and national standards are not clearly defined. This article will discuss the proposed bridge (door) crane cambered qualified (or should be) to determine the method. 1 bridge (door) crane girder deformation (camber minus