What are the three basic types of riser design?

The three basic types of riser design include vertical, sloped, and open configurations.

Vertical risers maintain a straight, upright appearance, making them suitable for traditional stair construction. They provide maximum stability and support, ensuring that the stairway follows building codes concerning height and safety.

Sloped risers are designed with an incline, which can facilitate a more gradual ascent and descent. This style is often employed in ramps or certain types of accessible designs where ease of use is prioritized, aiding those with mobility challenges.

Open risers, which lack a solid backing between the treads, provide a modern aesthetic and can create the illusion of lightness in a staircase design. This option allows for airflow and can highlight the materials used for both treads and carcass.

In contrast, the other options refer to combinations of designs or terminologies that do not accurately represent the fundamental categories used in carpentry for riser design. Understanding the fundamental types assists in choosing the appropriate riser design for specific architectural needs and safety regulations.