Design drawings shall be clearly legible and drawn to an identified scale that is appropriate to clearly convey the information.
Commentary
Historically, the most commonly accepted scale for structural steel drawings has been 1/8 in. per ft (10 mm per 1 000 mm). There are, however, situations where a smaller or larger scale is appropriate. Ultimately, consideration must be given to the clarity of the drawing.
The scaling of the design drawings to determine dimensions is not an accepted practice for detailing the approval documents. However, it should be remembered when preparing design drawings that scaling may be the only method available when early-submission drawings are used to determine dimensions for estimating and bidding purposes.