The scale is the relationship between an object drawn and real object. It is used as scale, usually a fractional number whose numerator is unity, for example, 1 / 50, in this example the real object is 50 times larger than the object drawn.
Types of Stops: Usually
scales drawings are expressed numerically, but there are cases where it is difficult to represent numerical scale drawings, in those cases used the so-called graphic scales that are not nothing but a line divided into a number of equal parts of the drawing showing lengths, equivalent to the original. These parts to see are divided into a number of other equally to more accurately assess the scale or extent that it expresses.
There are cases in which the designer can not make your drawing size, in this case will be done at much smaller drawings. Ie size will have to reduce the proportions of your drawing, representing the object but in a much smaller size. This is called drawing of reduction. There
otherwise be needed to represent an object so small that draw on its scale is almost impossible, then the designer draws pictures proportional to the real object but on a larger scale. This is called drawing of ampliación.Existen many types of numerical scales, but the most used are:
1: 2.5 - 1: 5 to 1: 10
1: 20 to 1: 25 to 1: 30
1: 50 - 1: 75 - 1: 100
1: 125 - 1: 200 - 1: 500
1: 1000 - 1: 2000 - 1: 5000
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