From this site

One project, every trade

Each calculator adds its lines to a single estimate — consolidated BOM, schedule and cash-flow included.

Open My Project →

Shaftwall Stud Framework Calculator

Calculate the number of shaftwall (CH/CT) studs needed for an elevator or mechanical shaft wall run.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-26 · v1.0.0

Market
Imperial · sales tax
32.81 ft
Schematic, drawn to the proportions you entered — not to scale on screen.

Shaftwall studs needed

18 studs

High confidence

Running these inputs gives 18 as the shaftwall studs needed. Note that stud spacing (in, o.c.) sits at the high end of the range this calculator was checked against, so treat the output as indicative rather than settled. Currently reading for United States under IRC 2024 — pick a different market above and the figures re-cast accordingly.

Estimated cost — your price

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • Shaftwall stud count = ceil(wall length ÷ spacing) + 1, the same layout method as standard steel/wood stud framing, typically at 24 in o.c. for shaftwall assemblies

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Frequently asked questions

Why does this use the same layout method as standard stud framing?
Shaftwall (CH/CT) studs are laid out along the wall run the same way as standard steel or wood studs — full spacing intervals along the length, plus one extra stud so both ends of the run are framed.
What stud spacing should I use?
24 in o.c. is typical for shaftwall assemblies, but the required spacing depends on the specific tested shaftwall system and its design listing — always confirm against the manufacturer's assembly documentation.
Does this include studs at door or duct openings?
No — this calculates the base stud count for a continuous straight run at even spacing. Additional jamb studs at openings should be added separately from your layout.