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How to Measure Stair Rise and Run
Step 6 of 6
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Step 6 · Calculate Actual Tread Run
Using the total run and the number of treads, divide the total run by the number of treads to calculate the precise depth of each individual tread. For the example of a 120-inch total run and 12 treads, the actual tread run would be 120 inches / 12 treads = 10 inches per tread.
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