INTRODUCTION TO THE TYPESDOE-HDBK-1016/1-93Introduction to Print ReadingOF DRAWINGS, VIEWS, AND PERSPECTIVESLogicDiagramsand PrintsLogic diagrams and prints can be used to depict several types of information. The most commonuse is to provide a simplified functional representation of an electrical circuit, as illustrated inFigure 10. For example, it is easier and faster to figure out how a valve functions and respondsto various inputs signals by representing a valve circuit using logic symbols, than by using theelectrical schematic with its complex relays and contacts. These drawings do not replaceschematics, but they are easier to use for certain applications.Figure 10 Example of a Logic PrintFabrication,Construction,andArchitecturalDrawingsFabrication, construction, and architectural drawings are designed to present the detailedinformation required to construct or fabricate a part, system, or structure. These three types ofdrawings differ only in their application as opposed to any real differences in the drawingsthemselves. Construction drawings, commonly referred to as "blueprint" drawings, present thedetailed information required to assemble a structure on site. Architectural drawings presentinformation about the conceptual design of the building or structure. Examples are house plans,building elevations (outside view of each side of a structure), equipment installation drawings,foundation drawings, and equipment assembly drawings.Fabrication drawings, as shown in Figure 11, are similar to construction and architectural drawingbut are usually found in machine shops and provide the necessary detailed information for acraftsman to fabricate a part. All three types of drawings, fabrication, construction, andarchitectural, are usually drawn to scale. PR-01Rev. 0Page 14
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