Custom configurations for stairway designs are associated with which clearance?

• A. Shaft Clearance
• B. Door Clearance
• C. Landing Clearance
• D. Platform Clearance

Answer: (C)

Custom stair configurations hinge on the space at the landing. The landing is the level area between flight runs or at the turn where the stairs change direction, and it must be large enough to safely accommodate stepping off one flight, turning, and continuing to the next. When stairs are designed in nonstandard layouts—winders, curved sections, or unusual sightlines—the landing clearance determines how comfortably and safely people can maneuver, align with the next flight, and avoid obstacles. That’s why landing clearance is the relevant consideration for custom stair designs. The other clearances relate to different parts of a building or structure—shaft surrounds, door swing space, or platform areas—and aren’t specifically about configuring stair layouts.