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Elevator Hoistway Shaft Sizing Calculator

Calculate the required hoistway plan dimensions from the elevator car size and manufacturer clearance allowances.

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
5.25 ft
Schematic, drawn to the proportions you entered — not to scale on screen.

Required hoistway plan area

38.86 ft²

Check your inputs

Hoistway clearances are always model- and capacity-specific per the elevator manufacturer's shaft layout drawing and ASME A17.1 — this calculator applies whatever clearance values you supply, it does not determine the correct clearance for your specific elevator.

Hoistway width
6.23 ft
Hoistway depth
6.23 ft

With the figures above, the required hoistway plan area comes to 3.61 m². The method behind this is well established, though site conditions and material batches will move it somewhat. This is calculated for United States and cites IRC 2024. Building in another market? Change the selector above so the units and code reference follow.

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

  • Hoistway width = Car Width + Additional Width Clearance; Hoistway depth = Car Depth + Additional Depth Clearance — hoistway clearances (for guide rails, counterweight assembly, and running clearance) are always specified by the elevator manufacturer for the specific model and capacity, per ASME A17.1; this calculator applies the clearance allowances you supply from the manufacturer's shaft layout drawing, not an assumed value.

Your workspace

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Frequently asked questions

Where do the clearance values come from?
From the specific elevator manufacturer's shaft layout drawing for that model and capacity, per ASME A17.1 — clearances allow for guide rails, the counterweight assembly, and running clearance, and are never a single fixed value across all elevators.
Can I use a generic clearance value if I don't have the manufacturer's drawing yet?
Only for very early, rough planning. The final hoistway dimensions must come from the actual selected elevator's certified shaft layout drawing before construction documents are finalized.
Does hoistway area account for the pit or overhead height?
No — this calculates only the plan (width x depth) area of the hoistway. Pit depth and overhead (headroom) height are separate dimensions also specified in the manufacturer's shaft layout drawing.