We are witnessing great and marvellous engineering projects around us, every now and then, especially in the 21st Century. Contractors and Sub-Contractors are supposed to put huge efforts to build great construction projects which are reliable and sustainable. There are certain steps and processes of building any construction project, ranging from small to big projects, depending upon their complexity. For that, we must know the initial stage, i.e. the designing stage. What we want to see around us has to be put on paper in the form of a design or a model. There is a lot of work to be done on paper before the construction process takes place.

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