What Is the Switchback Calculator?
Calculate switchback stair configurations with multiple parallel flights connected by landings. Switchback stairs are commonly used in commercial buildings, multi-story homes, and fire egress stairwells where vertical distance requires breaking the run into manageable flights.
How to Use This Calculator
- Enter the total rise across all flights.
- Set the number of flights and desired risers per flight.
- Configure tread depth, width, and landing dimensions.
- Review per-flight calculations and total footprint.
Why Accurate Switchback Calculations Matter
Switchback stairs efficiently use vertical space and provide natural rest points. Building codes require landings at specific intervals - the IRC limits flight vertical rise to 12 feet before a landing is required.
Building Code References
Related Tools
Frequently Asked Questions
How high can a single stair flight be?+
The IRC limits a single flight to 12 feet of vertical rise before a landing is required. Commercial codes (IBC) have the same 12-foot limit.