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An engineer’s scale is a ruler-like tool used to measure scale on engineering drawings. It has six scales and is used to read the true size of objects from a project drawing. It measures long distances and can be purchased for use with metric or imperial units.
An engineer’s scale is a ruler-like tool and is used to measure scale on engineering drawings. It is shaped like a long triangular prism, about 12 inches (30.5 cm) long, with each side of each point marked with a different scale for measurement. A total of six scales are used. The engineer’s scale is an important tool for reading blueprints in construction and civil engineering.
When a large structure needs to be constructed, full-scale plan drawings for the structure are rarely feasible. To overcome this problem, smaller “scaled” drawings are created. In other words, the smallest measurements on paper represent the largest measurements in reality. For example, an engineer might be working from a scale drawing where a distance of 1 inch on paper represents 10 feet in reality, or a distance of 1 centimeter represents 10 meters, depending on the engineer’s preferred system of measurement.
An engineer’s scale allows engineers to read the true size of objects from a project drawing. The tool is placed on the drawing and the measurement is read and interpreted based on the scale report, which is given beside each edge before the marks. For example, using a scale where 1 inch (2.54 cm) represents 10 feet (3.05 m), if the length of a wall on a project measures 4 inches (10.16 cm), the wall is 40 feet (12.2 m) long. The subdivisions between the marks can be used to indicate smaller increments.
You can use many different scaling ratios as needed. A typical engineer’s scale uses gradations that result in large measurements, with 10 feet (about 3.05 m) being the usual minimum. Some instruments might also have markings for translating distances long miles or kilometers. Such measurements may be required for pipeline laying or other large-scale activities.
An engineer’s scale measures long distances rather than shorter ones because it is mostly used in civil engineering. A similar tool called an architect’s scale is used to measure smaller distances, such as determining space and dimensions within a building. The architect’s scale might have a system of markings where 0.25 inch (about 6 mm) on the gauge represents 1 foot (about 305 mm) in real space.
Engineer scales are used all over the world and can be purchased for use with metric or imperial units. While they are often made of white plastic, wooden and metal versions can also be purchased. Most engineers prefer to use a ruler or common ruler to draw straight lines in the process of drafting a project, but the engineer’s scale can also be adapted for this purpose if necessary.
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