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Class notes 6 - Using Engineer and Architect Scales NOTE...

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± Using Engineer and Architect Scales NOTE: When PRINTING this document, be sure the pull down menu next to “Print Scaling” in the Print Dialog window is set to “None”. This will ensure the sample drawings will measure accurately. Introduction Using and interpreting information from engineer (civil) and architect scales is an important fire protection engineering skill. Construction and fire protection equipment drawings must be interpreted with a high degree of accuracy. Student Performance Objective Given an architect or engineer scale and a set of scaled drawings, you will be able to select the correct scale (tool) and interpret dimensions with 100 percent accuracy. Enabling Objectives 1) You will be able to identify the difference between engineer (civil) and architect scales. 2) Using a scale, you will be able to measure objects shown on civil engineering plans and architectural renditions of buildings and structures. 3) You will be able to interpret the results of the measurements. Scales Before they are built or assembled, roads, water mains, structures, and fire protection systems are designed in accordance with nationally recognized standards. The design concept is transferred to a set of plans (drawings) that provide a two- or three-dimensional representation of the project. Since it would be impractical to create full-size drawings for these objects, they are reduced to a manageable size (scale) so they can be studied. A set of plans may include a variety of different scales, depending upon what objects are being rendered. The selected scale normally is found in the title block in the lower right hand corner of the drawings, but may be found anywhere on the plans. You may find more than one scale on a single sheet when there are “details,” parts of the objects that are enlarged for clearer explanation. In order to interpret the size of what the renderings represent, the plan reviewer must use a tool called a “scale.” The word “scale” is used synonymously to represent the tool and the size reduction in the drawing. The scale tool provides a quick method for measuring the object and interpreting its eventual size when finished. Selecting the Correct Tool Traditional scales are prism-shaped tools that look similar to the rulers you may have used in elementary school. There are two types of drafting scales used in design and construction:
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² 1. Engineer, or civil, scales , such as 1˝ = 10´ or 1˝ = 50´, are used for measuring roads, water mains, and topographical features. The distance relationships
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