Common mistake in the representation in triple orthogonal projection of cylindrical-conical and methods for their elimination

Abstract

In many elements of street furniture (pergolas, terraces, benches, etc.) the straight cylinder (elliptical or circular) is found as a constructive element. In the execution drawings (plans, main or side views) of these elements, the correct representations in triple orthogonal projection in the clearance of the bodies are necessary. The paper shows the frequent mistakes of the representation in triple orthogonal projection in the shape of the straight cylinder (cylindrical or elliptical that has the base located in various planes (general position, vertical, parallel, or intersecting the OX axis) and propose a solution for avoiding misrepresentations.