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Step 2 · Calculate Nominal Riser Height

Based on the total rise, decide on the approximate number of risers. A common riser height is around 7 inches. Divide the total rise by your chosen number of risers to get the nominal riser height. For example, if the total rise is 100 inches and you aim for 14 risers, the nominal riser height would be 100/14 = 7.14 inches. You will later adjust this to achieve a consistent, code-compliant riser height for all steps.

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Step 2 · Calculate Nominal Riser Height

Based on the total rise, decide on the approximate number of risers. A common riser height is around 7 inches. Divide the total rise by your chosen number of risers to get the nominal riser height. For example, if the total rise is 100 inches and you aim for 14 risers, the nominal riser height would be 100/14 = 7.14 inches. You will later adjust this to achieve a consistent, code-compliant riser height for all steps.

Videos for this step

Calculate Individual Riser HeightCalculate Riser Height (Option 1)Calculate Approximate Number of Risers

Tools and Materials

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How to Measure Alternating Tread Stairs

Step 2 of 10·6.8 hr left

Determine Total Rise
15 minutes2 items
2
Calculate Nominal Riser Height
10 minutes1 items
3
Determine Total Run
15 minutes1 items
4
Calculate Tread Depth and Nosing
20 minutes2 items
5
Mark Stringers for Treads and Risers
60 minutes5 items
6
Cut Stringers
75 minutes4 items
7
Cut Treads
45 minutes4 items
8
Attach Stringers to Floor and Landing
30 minutes4 items
9
Install Treads
90 minutes4 items
10
Install Handrails and Guardrails
60 minutes5 items
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