Basics of Civil Engineering Drawing by ZA Siddiqui

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    Engineering drawing also called technical drawing and engineering graphics is the graphical representation of the shape of any physical object which may be a part of a machine, a building, a dam, or any other complicated structure. The shape of some simple objects like spheres, cubes, cylinders, etc., may be described in words and sentences but ordinary language fails for complicated objects. Even if a thick book is written to describe the shape of a building, the reader will not be able to conceive the exact shape of that building with all its minor details.

    This book is freely provided by myself to encourage the interest in the Civil Engineering field.

    Description

    Engineering drawing also called technical drawing and engineering graphics is the graphical representation of the shape of any physical object which may be a part of a machine, a building, a dam, or any other complicated structure. The shape of some simple objects like spheres, cubes, cylinders, etc., may be described in words and sentences but ordinary language fails for complicated objects. Even if a thick book is written to describe the shape of a building, the reader will not be able to conceive the exact shape of that building with all its minor details. It can be safely said that it is almost impossible to describe the shape of an object in words and hence only three methods are left for the purpose namely camera photographs, models, and drawings.

    Camera photographs can only be used to communicate the shape of existing structures but not the shape or design still in the mind of the designer. Further, these photographs do not show all the inner details and actual dimensions are not communicated. Models, usually made up of wood, polystyrene, soap, plastic, etc., are perhaps the best tool for the description of the shape but these are generally used for explaining finished outer shapes of the structures to non-engineering persons. Sometimes models, made smaller in size, are also used to carry out performance studies of bigger structures like canals, dams, and turbines. Models require much more skill and time for their creation necessitating relatively more skilled persons employed for longer periods; also more space is required in offices for their storage. Hence, the cost to describe the shape with models is usually much greater and this method for shape-communication is not generally used except only in special cases. The easiest way left to describe an object is to make drawings; simply lines are drawn nr a piece of paper according to certain fixed rules.

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