Which scale is NOT commonly used in construction plans?

In construction plans, various scales are utilized to represent different dimensions accurately, allowing for clear communication of design parameters. Common scales include 1/8" = 1', 1/4" = 1', and 1/2" = 1'. These scales are frequently used in architectural and engineering drawings because they provide a balance between detail and ease of interpretation for typical building projects.

The scale of 3/4" = 1' is less common and is not typically used in standard construction plans. This scale can create confusion due to its non-standard ratio, which is not widely recognized in the industry. Most professionals and tradespeople are accustomed to the commonly employed scales, which tend to be whole-number fractions that enhance clarity and standardization in the industry. Therefore, identifying 3/4" = 1' as a scale not commonly used aligns with standard practices in construction documentation.