Stringer layout for a 60 inch rise
Learn how to calculate stair riser height with a total rise of 60 inches while adhering to the IRC limit of 7.75 inches. Ensure safe and compliant stair design.
Formula SSC-2026.1
IRC check pass
Risers / treads
8 / 7
Riser inside 4 to 7.75 in
Exact riser
7 1/2 in
190.5 mm
Total run
6 ft 1 1/2 in
1,867 mm
Stringer length
7 ft 10 7/8 in
Order 10 ft 2x12
Incline
39.23°
Square 7 1/2 in rise · 10 1/2 in run
Stringers @ 16 in
3
Throat 5.15 in on a 2x12
Rise, run, and the incline are scaled from the live riser and tread. Framing-square gauges match the exact riser and the tread depth.
| Item | Net | Waste | Order | Unit price | Line total | Source Spec Material / Tool |
|---|---|---|---|---|---|---|
| 10 ft 2x12 | 8.53 ft cut | end cuts included | 3 boards | USD | $63.00 | Source Spec Material / Tool |
| Stringer delivery weight | 84 lb | — | 38 kg | 2.8 lb/ft planning weight | — | Source Spec Material / Tool |
Source links open a product search on the Amazon storefront for the selected currency. SiteSpecCalc may earn a commission. The link does not change the quantities above.
| Total rise | Risers | Exact riser | Treads | Run | 2x12 stock | Check |
|---|---|---|---|---|---|---|
| 5 ft 0 in | 8 | 7 1/2 in | 7 | 6 ft 1 1/2 in | 10 ft | Pass |
| 5 ft 6 in | 9 | 7 5/16 in | 8 | 7 ft 0 in | 10 ft | Pass |
Show the deterministic formula
Risers = round(total rise ÷ target rise). Exact riser = total rise ÷ risers, reported to the nearest 1/16 in and in millimeters. Treads = risers − 1. Total run = treads × tread depth.
Diagonal = hypotenuse of stringer rise and total run. A dropped header uses total rise minus landing thickness. Stock is the next 8, 10, 12, 14, 16, 18, 20, or 24 ft board.
Stringers = floor(width ÷ 16) + 1, with a minimum of 2. Throat ≈ 11.25 − (riser × tread) ÷ hypotenuse.
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Project: Stringer layout for a 60 inch rise
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This sheet is an estimate for ordering and layout discussion. It is not a sealed design. Confirm the quantities with a licensed local professional and the authority having jurisdiction before you buy or build.
Engineering notes
When designing stairs, it is crucial to adhere to the International Residential Code (IRC) which specifies that the maximum riser height should not exceed 7.75 inches. For a total rise of 60 inches, this means you can have a maximum of 7 risers, resulting in a riser height of approximately 8.57 inches, which exceeds the limit. Therefore, adjustments must be made to ensure compliance.
Note that headroom calculations are not included in this assessment, but it is essential to ensure that the stairway provides adequate clearance for safe use.
Code reference
IRC Section R311.7.5
Field questions
- What is the maximum riser height allowed by the IRC?
- The maximum riser height allowed by the IRC is 7.75 inches.
- How do I calculate the number of risers for a total rise of 60 inches?
- To calculate the number of risers, divide the total rise by the riser height. For example, if you use the maximum riser height of 7.75 inches, you would need approximately 7.74 risers, which rounds up to 8 risers.
- Is headroom considered in riser calculations?
- No, headroom is not calculated in the riser height assessment, but it is important to ensure that there is adequate clearance above the stairs.