What is the common thickness of load-bearing walls?

The common thickness for load-bearing walls is typically tied to the gauge of steel used, which reflects the thickness of the material. In construction, gauge refers to the standard for measuring the thickness of metal, particularly in relation to structural steel members and other materials where strength and load-bearing capacity are critical.

Load-bearing walls usually require materials that provide strength sufficient to support loads from above, such as floors, roofs, and other structural elements. A gauge of 18 would indicate a thicker material that offers higher load-bearing capacity compared to a 20 gauge or lower. When you look at the gauges provided in the answer, 18G stands out as a thickness that is commonly utilized for such structural elements.

The inclusion of a 29G, although thinner compared to 18G, can sometimes be relevant in certain applications but often pertains to non-structural components or areas where low-load conditions exist. However, in typical load-bearing applications, a thicker gauge, such as 18G, is more favorable, signifying increased durability and resilience against deformation under load.

Therefore, the choice indicates the most appropriate combination of gauges that align with the requirements for load-bearing walls while ensuring safety, structural integrity, and effective load distribution in construction practices.