Before you start looking at the standard scale of the drawings, it should be understood that it is the concept.Thus, such a value is generally a ratio of two linear dimensions.However, the more widely known is the interpretation of this definition, the ratio of the size of the drawing to the actual size of the object.Therefore, we can rightly assume that the above term is widely used in cartography, geodesy and, of course, design.
Why is this necessary?
As mentioned earlier, the real object may have to be sufficiently large size and very small.However, a person can not sketch everything in life-size, as for display on a sheet of paper floor plan will require enormous dimensions of the canvas, and, in turn, to recreate small items (such as in the clock mechanism) would require a high degree of detail.As a result, people adapted to depict the necessary facilities that are a certain number of times to reduce (or increase) for ease of perception and so-called "readability" picture.Currently, there are certain standards, such as GOST "The scale of the drawings", which describe all the requirements to the form and filling the screen.
As mentioned earlier, to display buildings and other large items must use scale drawings so-called reduction.They are standardized, which means that random sampling is not suitable.Most frequently the following values: 1: 2;2.5;4;5;10;15;20;25;40;50;75;100;200;400;500;800;1000. We consider that this type of recording means.So, the real (ie, natural) dimension of an object is expressed in the form of inscriptions 1: 1. Therefore, with decreasing scale drawings first describe the original size (1), and then the number that shows how many times the drawing is reduced in relationto the real dimensions.In construction, in addition to the above standard records can be used as pointers 1: 2000;5000;10000;20000;25000;50 000.
In the event that you need to figure draw small objects that are traditionally used to increase the scale of the drawings.In this case, there is such a wide variety of values, but a standard stipulated most frequently used values.So, a typical number is as follows: 2;2.5;4;5;10;20;40;50;100: 1. Explanation of these inscriptions read as follows: first number indicating how many times an image in the drawing is increased compared with the original object.The second digits after the colon shows the real (aka - natural or real) size of the object (taken as equal to 1).
Conclusion This article examined the scale of the drawings and their standard ranks.It should also be noted that in themselves plans, designs and images scale value specified in a designated space provided in the frame, otherwise called stamp.