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A specification control drawing defines the technical requirements and standards for a product, detailing how it should be designed and manufactured. In contrast, a source control drawing specifies the approved suppliers and manufacturing processes for a component, ensuring that only designated sources are used to produce it. While both types of drawings serve to maintain quality and consistency, specification control focuses on the product's characteristics, whereas source control emphasizes the provenance of the materials and components.
Speed and accuracy.
Before reading any civil drawing we must understand the purpose of each line, word, symbol, appreviation and specification referred to, as to indicate the construction team required to do the attempted works.
To individualise visual expressions of a particular specification or part within a drawing. Using the drawing key will help to differentiate between symbols. The meaning of any given symbol or abbreviations in information documentation is to aid the user with regard to exacting specification, i.e.; Ω - means to measure or read in Ohms, Nm and Ibs may be used for weight in torque measurements, ISO metric, BSF, Whitworth, ANC, ANF, UNF, UNC are all nut and bolt thread types.
Engineering Drawing is a two dimensional representation of three dimensional object.It is graphic language from which a trained person can visualize the object.It is an universal language of engineers by which you can represent your new ideas. Mechanical Engineers use E.D to draw Auto mobiles,Machine Designs and Components etc. Civil people use the same E.D for representing the designs of structures,dams,bridges,building etc. Electrical and Electronics engineers use it for drawing circuits,electronic components,fabrication works, satellite designs,Antenna for signal recieving etc.
Clear and dimensional accuracy in marking out is critical in all circumstances. You spend the time marking something out then you or others should be able to see it clearly. Drawing requirements must be followed at all times you mark out to the tolerance the drawing states.
Clear and dimensional accuracy in marking out to specification and drawing requirements is crucial to ensure that components fit together correctly and function as intended. It minimizes errors during manufacturing and assembly, reducing waste and rework costs. Precise measurements also enhance safety and reliability in the final product, ensuring it meets quality standards and regulatory compliance. Ultimately, accuracy fosters efficiency and consistency in production processes.
THREE DIMENSIONAL DRAWING OF STRIP FOUNDATIONS
The answer depends on the purpose. For example, the accuracy required from an engineering drawing is much greater than a child's drawing of his house.
isometric drawing
yes
Impossible
accuracy
Drawing and painting are two-dimensional, sculpture is three-dimensional.
a picture with depth
parallel and perspective
An isometric is more specific