我厂生产的大吨位中级工作制桥式起重机(以下简称桥机)主要是供机器制造厂和冶金厂的车间内外作零部件和成品的吊运工作使用的。起重量为100/32吨至250/50吨,跨度为13米至31米。它包括的产品规格不少,但生产的批量不大。在设计工作方面,我们常常要为每一台订货进行单独的设计,设计的工作量很大。在不同起重量和不同跨度之间有许多可以通 The large-tonnage intermediate working bridge crane (hereinafter referred to as the bridge crane) produced by our factory is mainly used for the lifting work of parts and finished products inside and outside the workshop of the machine factory and the metallurgical plant. The lifting capacity is 100/32 tons to 250/50 tons and the span is 13 meters to 31 meters. It includes many product specifications, but the production volume is not large. In terms of design work, we often have to design for each individual order, and the design work is very heavy. There are many links between different lifting weights and different spans.