What is the purpose of a stringer in stair construction?

The purpose of a stringer in stair construction is primarily to support treads and risers. A stringer is a structural component that runs along the sides or middle of the stairs, providing the necessary framework that bears the weight of the steps as well as the people using them.

In more detail, treads are the horizontal parts of the stairs that you step on, and risers are the vertical sections that connect each tread. The stringer holds these components in place and ensures that they maintain the correct spacing and alignment, which is crucial for safety and usability. Without a properly constructed stringer, the staircase would not be stable or secure.

While connecting walls, providing insulation, or serving as a decorative feature may be aspects of different building components, they do not pertain to the primary function of a stringer in stair construction. Thus, supporting treads and risers not only fulfills the structural requirements of stair design but also ensures compliance with building codes and safety standards.