为了介绍一部分国外采用的起重机设计方法与计算标准供读者参考,将美国WHITING公司出版的起重机手册的第九章—起重机设计概要,全文翻译出来分三次在本刊发表。这一期发表的是第一部分,关于桥架设计;另外两部分为小车设计及电气设计,将在以后陆续发表。该起重机手册原文共有三版,本文是根据1967年的第三版翻译的。 In order to introduce some of the crane design methods and calculation standards used abroad for readers’ reference, the ninth chapter of the crane manual published by the WHITING company in the United States, the outline of the crane design, is translated and published in three parts. This issue is published in the first part, on the bridge design; the other two parts for the car design and electrical design, will be published one after another. There are three original versions of this handbook, which is based on the third edition of 1967.