If stairs are wider than 30", they typically require a housed stringer. A housed stringer is a type of stair stringer where the treads and risers are housed or notched into a routed channel in the stringer board. This design provides a cleaner and more streamlined look for wider stairs, ensuring stability and structural integrity.
Housed stringers are commonly used in wider stairs to support the treads and risers securely. This type of construction helps distribute the weight of the staircase more evenly, reducing the risk of sagging or structural issues over time. Additionally, housed stringers can enhance the overall aesthetic appeal of the staircase by hiding the edges of the treads and risers within the stringer.
In contrast, other options like O purlin, mid-rib riser, and center cutout stringer are not typically required for stairs wider than 30". Each of these options serves different purposes in staircase construction but are not specifically needed for wider stairs. It's essential to choose the appropriate stair design elements based on the width and structure of the staircase to ensure safety, functionality, and visual appeal.
