What is the maximum depth of chases and recesses in masonry walls relative to the wall thickness?

The correct answer highlights that the maximum depth of chases and recesses in masonry walls should not exceed one-third of the overall wall thickness. This guideline ensures that the structural integrity of the wall is maintained while allowing for the installation of services or other features. By limiting the depth to one-third, the wall retains sufficient material to support loads and withstand various stresses, which is particularly important in maintaining the strength and durability of the structure.

This approach is also in accordance with building codes and best practices that aim to prevent issues such as cracking or weakening of the wall over time, which could be exacerbated by deeper chases. Understanding this balance between necessary modifications for utility work and the preservation of structural performance is essential for building inspectors and construction professionals.