BlueprintCompositionsIntroductionBlueprintcompositionsMaster copyStandardsBlueprints and technical drawings have very specific formats for compositionbased on logic and industry standards. Learn blueprint terminology andstandards. Do not deviate from the established industry format.Blueprints are copies of engineering drawings used as plans to construct orfabricate objects and machines. One of the first processes developed toduplicate tracings produced white lines on a blue background; hence thename blueprint. Today, other methods are available to reproduce copies andthe final images may be brown, blue, black, grey, or maroon. Originaldrawings are referred to as the master copy.Master copies are the original engineering drawings drawn on translucentpaper, cloth, or Mylar in pencil, ink, or computer-aided drafting (CAD)systems. Compositional elements in master copies are placed in standardizedlocations and in very specific ways. Sheet sizes, margins, and the locationsof title blocks, revision blocks, drawing numbers, legends, and the associatedmaterials blocks are some of the elements that must be preset in thecomposition.Prescribed standards and procedures for military engineering drawings arestated in military standards (MIL-STD) and American National StandardsInstitute (ANSI) standards. The Department of Defense Index ofSpecifications and Standards lists these standards and is updated yearly.Sometimes standards are referred to as Department of Defense Standards(DOD-STD). The MIL-STD you need most often is MIL-STD-100A.Obtain a copy of the standards for the shop and make sure you refer to themost current copy.Continued on next page1-45
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