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铁道部第一勘测设计院在编制标准设计时,对绘图的统一和图幅的合理问题作了探讨研究。他们整编的一套圆形、圆端形沉井图,原拟用2号图幅,后经试绘改为3号,全套95张图纸仅有少量需折页,不但节省纸张,而且携带方便。图中钢筋布置复杂,绘图细节问题较多,在大量绘制前,先由专人绘制样板图,统一标准,按钢筋类型编号,归纳为15种,对于钢筋长度和根数的计算,也事先推导出公式,经复核后发给设计者,避免各搞一套,做到了
The first surveying and design institute of the Ministry of Railways in the preparation of the standard design, made a study on the unity of drawing and the rationality of the map. They have compiled a set of round and round-end caisson plans, originally planned to use the No. 2 map, after the trial was changed to No. 3, a full set of 95 drawings only a small amount of folding, not only save paper, but also easy to carry . In the drawing, the arrangement of reinforcing bars is complex and there are many problems in drawing details. Before a large number of drawings, the model drawings are drawn by a person, and the standard is unified. The number is classified according to the type of steel bars. It is classified into 15 types. The calculation of the length and number of steel bars is also derived in advance. The formula is sent to the designer after review, avoiding each set and achieving