What is the common scale used in architectural drawings?

In architectural drawings, various scales are used to represent the dimensions of a structure accurately while fitting the drawing on a manageable sheet size. The scales mentioned—1:50, 1:100, and 1:200—are indeed standard scales commonly utilized in the industry.

The scale of 1:50 means that 1 unit (for example, one centimeter) on the drawing represents 50 units in reality. This scale is often used for detailed drawings, such as floor plans or sections, where clarity and detail are important.

The 1:100 scale means that 1 unit on the drawing corresponds to 100 units in actual measurements. This scale is frequently used for site plans or where a broader view is needed without losing important information.

Similarly, the 1:200 scale indicates that 1 unit on the drawing represents 200 units in actual size. This scale is generally useful for larger site plans, allowing an overview of large areas while maintaining readability.

Using a combination of these scales allows architects and builders to convey information effectively, depending on the level of detail required for particular drawings. Therefore, it is accurate to say that all the listed scales are commonly used in architectural practice, validating the selected answer.