This paper examines how to automatically reconstruct 3D models from their orthographic two views and explains a new approach developed fort hat purpose. The approach is based on the identification of geometric features with the interpretation of 2B views, their volumetric intersections and reconstruction of solid models. A number of rules have been defined for this goal and they implemented on a prottype software with the approach of expert systems. The developed software allows determination of some features efficiently such as slot, holes, blind holes, closed prismatic holes, etc. Another contribution of this research is to reconstruct solid models from their sectional and half section views that is almost noneexistend in the related literature.