Winder stairs, with their unique wedge-shaped treads, offer an elegant solution for changing direction in a staircase without the need for a landing. However, their design presents specific safety challenges, which is why some building codes often include a crucial measurement: the 6-inch rule. This rule states that winder treads must have a minimum depth of 6 inches at any point within the clear width of the stair.
Why the 6-Inch Minimum?
This requirement is rooted in safety considerations:
Foot Placement: Winder treads are narrower on one side than the other. The 6-inch minimum ensures that there's enough space for a person to place their foot securely, even on the narrowest part of the tread.
Stability: Adequate tread depth provides stability and reduces the risk of slipping or losing balance, especially when ascending or descending the stairs.
Code Compliance: Adhering to this rule ensures that the staircase meets safety standards and avoids potential code violations.
Where to Measure the 6 Inches
The 6-inch measurement is taken at the narrowest point of the winder tread, typically along the inner curve of the staircase. This ensures that even the smallest portion of the tread provides adequate footing.
By understanding and adhering to this rule, stair builders and designers can create beautiful and functional winding staircases that prioritize the safety and well-being of those who use them.
