The word "scalage" is a noun that refers to the act of measuring or estimating weight, quantity, or size. It is often used in contexts where you need to determine the amount of material, like lumber in a log.
While there are no specific idioms directly related to "scalage," you might use the phrase "scale up" to mean increasing the size or quantity of something, which is a related concept.
"Scalage" is a technical term used mainly in specific fields to describe the process of measuring or estimating the amount of material, especially in lumber.