According to code, what is the maximum diameter of a hole that may be bored in a 2x10 joist?

The maximum diameter of a hole that may be bored in a 2x10 joist is set to ensure the structural integrity of the joist while allowing for the installation of plumbing, electrical, and other utilities. According to most building codes, the maximum allowable diameter for a bored hole in standard wood floor joists, such as a 2x10, is typically 3 inches.

This specification strives to balance the need for plumbing and other installations within the structural components of a building while maintaining enough wood around the hole to support the load. Boring a hole larger than the prescribed diameter could compromise the strength of the joist, leading to potential structural issues.

When considering options, 3 inches represents the maximum limit established in various building codes for a joist of this size, making it the correct choice for this question.