Expert knowledge relating to construction is in the main held personally by experienced practitioners and therefore not always accessible. This knowledge is usually gained on site over long period of time and is very difficult if not impossible to transfer in conventional form such as notes and books because of it's heuristic nature and the time needed to make records. Expert Systems indicate that these disadvantages can be countered by enlisting expertise structured in a manner that facilitates a user to steer a course of learning to solve problems which are largely judgment dependent. This paper comments on two applications for claim analysis and earthmoving operations and plant selection used in a teaching context.