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This paper describes the development of KASTLE—a knowledge‐based system for synthesis and design of steel lattice self‐supporting transmission towers. Using inputs such as type of tower, geographical location, the voltage the conductor has to carry and the number of circuits the tower has to support, an experienced designer arrives at an overall configuration of tower. An expert designer basically relies on heuristics to choose parameters, such as base width, tophamper width, type of bracings and sub‐bracing pattern, for the tower configuration. The final cost of the tower is sensitive to these initial decisions. Geometric modelling of the configuration is prerequisite for tower analysis. This paper reports an attempt to integrate different types of knowledge‐based systems using blackboard architecture. The knowledge system for configuration generation uses theorem proving, whereas in other knowledge‐based systems, such as modelling and design heuristics, knowledge has been represented using IF‐THEN rules. A sample synthesis and design of a 220 kV and 400 kV tangent tower is included. The system has been implemented on an IBM PC AT with MS‐DOS. Prolog, Fortran, and C languages were used.

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