Do risers go over treads?

Do Risers Go Over Treads in Stair Construction?

No, risers do not go over treads. In standard stair construction, the treads (the horizontal part you step on) are installed first, followed by the risers (the vertical part between each tread).

Understanding the Order of Installation

The sequence of installing treads and risers is crucial for ensuring the structural integrity and safety of a staircase. Let’s delve deeper into why this order is followed and the implications for building codes and remodeling trends in the USA.

Treads First, Risers Second: The Rationale

• Load-Bearing Capacity: The treads are the primary load-bearing components of a staircase. They distribute the weight of people and objects using the stairs across the stringers (the supporting structures on the sides). Installing the treads first ensures a solid foundation for the staircase.
• Structural Stability: Once the treads are securely fastened to the stringers, they provide a stable platform for attaching the risers. The risers primarily serve to close the gaps between the treads, preventing objects from falling through and adding to the overall aesthetic appeal.
• Code Compliance: Building codes in the USA generally mandate specific dimensions and tolerances for stair treads and risers to ensure safety. Installing the treads first allows for precise measurements and adjustments to comply with these codes.
• Remodeling Considerations: When remodeling or replacing stairs, it’s often easier to remove and replace the treads first, followed by the risers. This approach minimizes disruption to the overall structure of the staircase.

Building Codes and Stair Construction

Building codes in the USA provide guidelines for various aspects of stair construction, including:

• Riser Height: The maximum riser height is typically 7 ¾ inches. This ensures that each step is comfortable and safe to climb.
• Tread Depth: The minimum tread depth is usually 10 inches. This provides adequate space for a secure foothold.
• Nosing: The nosing (the projecting edge of a tread) can extend up to 1 ¼ inches beyond the riser. This helps to increase the tread depth and improve safety.
• Headroom: The minimum headroom clearance above stairs is typically 6 feet 8 inches. This prevents people from bumping their heads while using the stairs.

Adhering to these building codes is essential for ensuring the safety and functionality of any staircase.

Trends in Staircase Design

While the basic principle of treads preceding risers remains unchanged, there are evolving trends in staircase design that influence the overall look and feel. Some of these trends include:

• Open Risers: Staircases with open risers (no vertical component between the treads) are gaining popularity due to their modern aesthetic and ability to create a sense of openness in a space. However, they may not be suitable for homes with young children or pets due to safety concerns.
• Floating Stairs: These stairs appear to float in mid-air, with no visible stringers. They create a dramatic visual impact but require careful engineering and construction to ensure stability.
• Mixed Materials: Combining different materials for treads and risers (e.g., wood treads with glass risers) is a popular way to add visual interest and create a unique look.

Conclusion

Understanding the order of installation for treads and risers is crucial for anyone involved in building or remodeling stairs. By following the standard practice of installing treads first, followed by risers, and adhering to relevant building codes, you can ensure the safety, functionality, and aesthetic appeal of your staircase.