The space required for stairs can vary depending on various factors such as building codes, architectural design, and safety considerations. Here are some general guidelines for residential stairs:
Tread Depth: The horizontal distance from the front edge (nosing) of one step to the front edge of the next step is called the tread depth. It typically ranges from 9 to 11 inches (22.86 to 27.94 cm). The tread depth should be consistent throughout the staircase.
Riser Height: The vertical distance between two consecutive steps is called the riser height. It generally ranges from 7 to 8.25 inches (17.78 to 20.96 cm). Like tread depth, the riser height should also be consistent for all steps in a staircase.
Headroom: The vertical space above the staircase, known as headroom, should be sufficient to prevent any head bumps. Building codes often require a minimum headroom clearance of 6 feet 8 inches (203 cm) from the leading edge of each step to the ceiling or any obstruction.
Width: The width of a stairway, including handrails, should be adequate to allow safe passage. Building codes often require a minimum stair width of 36 inches (91.44 cm) for residential stairs.
It's important to note that these dimensions are general guidelines and may vary based on local building codes and regulations. Additionally, commercial buildings, public spaces, and specialized staircases may have different requirements. Therefore, it's recommended to consult with local building authorities or professionals to ensure compliance with specific regulations and safety standards.