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Step 5 · Determine the Tread Depth

With the number of treads determined and the total run measured, you can calculate the required depth for each tread. The 'run' of a single tread is typically the horizontal depth from the front edge of one tread to the front edge of the next. A common guideline for comfortable stairs is a run between 9 and 10 inches. Building codes will specify minimums. Subtract the thickness of the tread nosing (usually 1 to 1.5 inches) from the desired tread depth to get the actual required tread depth before the nosing.

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Step 5 · Determine the Tread Depth

With the number of treads determined and the total run measured, you can calculate the required depth for each tread. The 'run' of a single tread is typically the horizontal depth from the front edge of one tread to the front edge of the next. A common guideline for comfortable stairs is a run between 9 and 10 inches. Building codes will specify minimums. Subtract the thickness of the tread nosing (usually 1 to 1.5 inches) from the desired tread depth to get the actual required tread depth before the nosing.

Videos for this step

Determine Tread Overhang and LengthDefine Tread Depth and ConsistencyCalculate Individual Riser Height & Tread Depth

Tools and Materials

← Project

How to Measure and Plan Treads for a Split-Level Staircase

Step 5 of 8·55 min left

Measure the Total Rise
10 minutes2 items
Determine the Number of Treads
5 minutes1 items
Calculate the Actual Riser Height
5 minutes1 items
Measure the Total Run
10 minutes1 items
5
Determine the Tread Depth
5 minutes1 items
6
Plan for Nosing and Overlap
5 minutes
7
Sketch the Staircase Layout
15 minutes3 items
8
Verify with Local Building Codes
30 minutes2 items
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