40 Hour Property and Building Inspection Practice Test

Sub floors serve a similar purpose to which of the following?

1. Floors and ceilings

2. Roofs and walls

3. Joists and beams

4. Windows and doors

The correct answer is: Joists and beams

Sub floors function as part of the structural system of a building, providing a stable base for the floor coverings and adding strength and support to the overall structure. They are typically constructed over floor joists, which are the horizontal supports that underlie the floor. By serving this foundational role, sub floors work in conjunction with joists and beams, which are essential components for distributing loads and ensuring the integrity of the flooring system. This relationship highlights their similar purpose in supporting weight and providing stability within the building framework. In contrast, the other options—floors and ceilings, roofs and walls, and windows and doors—don't fulfill the same structural support role that sub floors do. While they contribute to different aspects of a building's functionality (e.g., separation of spaces, protection against the elements, and access), they do not primarily serve as foundational components like sub floors, joists, and beams do.