An 8" jamb is built at the end of which type of wall?

A double-wythe wall consists of two separate layers or "wythes" of masonry units, typically bricks or blocks, that are built with a space in between them. The presence of an 8-inch jamb at the end of this type of wall indicates that the construction is designed to support additional loads and connect securely to other structural elements.

The design of a double-wythe wall allows for enhanced structural integrity, thermal insulation, and better sound attenuation compared to single-wythe walls. The jamb serves as a vertical support element that can frame doorways or windows, providing the necessary width and strength that matches the overall thickness of the wall.

In contrast, other wall types, like single-wythe or corner pole walls, do not provide the same substantial construction attributes and therefore would not typically feature an 8-inch jamb. This explains why the correct answer focuses on the double-wythe construction method, which is characterized by the use of two wythes and the resulting structural benefits.