1. What is Stair Stringer Calculation?

Stair stringer calculation determines the rise and run for each step in a staircase. Proper calculations ensure comfortable and safe stairs that meet building codes.

2. How Does the Calculator Work?

The calculator uses these formulas:

Where:

• Total Rise — Vertical height from bottom to top of staircase
• Total Run — Horizontal depth of the staircase
• Number of Steps — Total number of steps needed

Explanation: The calculations evenly distribute the total rise and run across all steps for consistent stair dimensions.

3. Importance of Proper Stair Dimensions

Details: Correct rise and run measurements ensure comfortable, safe stairs that meet building codes. Improper dimensions can make stairs uncomfortable or dangerous to use.

4. Using the Calculator

Tips: Measure total rise (vertical) and total run (horizontal) carefully. Number of steps should be appropriate for the space - typically 7-8 inches rise and 10-11 inches run per step.

5. Frequently Asked Questions (FAQ)

Q1: What is the ideal rise/run ratio?
A: Most building codes recommend rise between 7-8 inches and run between 10-11 inches for comfortable stairs.

Q2: How do I determine number of steps?
A: Divide total rise by desired individual rise (usually 7-8 inches) and round up to nearest whole number.

Q3: What are common building code requirements?
A: Codes often require uniform rise/run, maximum rise (typically 7.75"), minimum run (typically 10"), and maximum variation between steps.

Q4: Should I account for tread thickness?
A: Yes, the top step's rise will be reduced by the tread thickness when installed on a finished floor.

Q5: How do I adjust for odd measurements?
A: You can slightly adjust either the total run or the number of steps to achieve comfortable dimensions.