The paper presents examples of approximate calculations of force values in members of selected types of trusses, which are at the same time an internal and external statically indeterminate systems. The two-stage method makes possible the approximate calculation of such trusses by help of, for example, the Cremona’s method. In each stage, a statically determinate truss is considered, pattern of which is defined by removing from the basic truss a suitable number of members. There are also presented results of calculations of the same trusses done by means of suitable computer software together with analyses and comparison of outcomes.

中文翻译：

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两阶段法用于选定类型静定桁架的近似计算

本文介绍了选定类型的桁架成员中力值的近似计算示例，这些桁架同时是一个内部和外部的静态不确定系统。两阶段法可以借助例如克雷莫纳法对此类桁架进行近似计算。在每个阶段，考虑一个静定桁架，其模式是通过从基本桁架中移除适当数量的成员来定义的。还提供了通过适当的计算机软件完成的相同桁架的计算结果以及结果的分析和比较。