TL;DR — Key Takeaways
• IBC Chapter 30 governs all vertical transportation — passenger elevators, freight elevators, escalators, moving walks, dumbwaiters, platform lifts, and stairway chairlifts — and adopts ASME A17.1/CSA B44 as the primary safety standard.
• ASME A17.1-2022 (Safety Code for Elevators and Escalators) is referenced by IBC 2024.
• Elevators are required (not merely permitted) in multi-story buildings where accessibility to upper floors is required per §1104.4 and the ADA — any building with an accessible route to upper floors must provide an elevator.
• Fire service access elevators (§3007) are required in all high-rise buildings — one or more elevators must meet specific requirements for firefighter use including two-way communication, water-resistance, recall features, and minimum cab size.
• Occupant evacuation elevators (§3008) — for buildings over 420 feet — must have additional features enabling voluntary occupant evacuation during a fire using the elevator system.
• Machine room-less (MRL) elevators are widely used in modern construction and are fully addressed in ASME A17.1 Part XXVII — the IBC has no prohibition on MRL systems.
• Elevator pit requirements (§3002.6): A minimum pit depth of 4 feet is required for elevators at the lowest landing; lighting, ladder, and a stopped condition are required in the pit.
• Escalators and moving walks must comply with ASME A17.1 Part IX; they are not accessible means of transportation under ADA and cannot substitute for an elevator for accessibility compliance.
The IBC-ASME A17.1 Framework
IBC §3001.1: "Elevators, escalators, moving walks, conveyors, personnel hoists and material hoists, and other conveying systems and equipment shall comply with ASME A17.1/CSA B44."
ASME A17.1 (jointly published with the Canadian Standards Association as B44) is the comprehensive elevator safety code covering design, installation, inspection, testing, and maintenance. The code is structured in parts by elevator type:
• Part I — Electric elevators
• Part II — Hydraulic elevators
• Part III — Escalators and moving walks
• Part XXVII — Machine room-less elevators (added in 2000)
IBC Chapter 30 supplements ASME A17.1 with building-specific requirements: hoistway construction, machine room construction, pit requirements, and the special requirements for fire service and occupant evacuation elevators.
Hoistway Construction Requirements (§3002)
Enclosure (§3002.1)
Elevator hoistways must be enclosed with fire-resistance-rated construction per Table 3002.1. The rating required depends on the number of stories connected and the construction type:
• Hoistways connecting ≤4 stories: 1-hour minimum
• Hoistways connecting >4 stories: 2-hour minimum
• In Type I and II construction: 2-hour minimum regardless of stories
The hoistway enclosure must extend from the lowest landing served to the top of the hoistway structure, providing continuous fire separation between the hoistway and occupied spaces.
Hoistway Openings (§3002.2)
Hoistway openings (elevator doors) must be protected with fire doors at each floor. Elevator doors are typically rated at 1½ hours for a 2-hour hoistway and 3/4 hour for a 1-hour hoistway per the rated assembly listing.
Sliding elevator doors (most common type) must also be equipped with a reopening device (safety edge or light curtain) that prevents the door from closing on a person.
Pit Requirements (§3002.6)
Every elevator must have a pit below the lowest landing:
• Minimum pit depth: 4 feet (ASME A17.1 requires the specific depth based on elevator type and speed — 4 feet is the IBC minimum override)
• Pit lighting: A switched light and duplex outlet are required in the pit
• Pit ladder: A permanently mounted ladder from the pit floor to the lowest landing
• Pit stop switch: An accessible stop switch at the ladder access point to disable elevator operation while personnel are in the pit
Machine Rooms and Machine Spaces (§3002.3–§3002.5)
For traditional traction elevators with a machine room:
• Machine rooms must be accessible for service (30-inch minimum clearance around equipment)
• Temperature: 50°F to 90°F maintained
• Machine room doors: minimum 3½ feet wide by 7 feet high, self-closing and self-locking
Machine room-less (MRL) elevators locate the drive unit within the hoistway — no separate machine room is required. IBC §3002.3 allows MRL systems; the machine space within the hoistway must still be accessible for service.
Elevator Types in Commercial Buildings
Electric Traction Elevators
The standard choice for buildings over 5 stories. The counterweight balances the cab weight, reducing motor power requirements. Available in:
• Geared traction: Drive sheave geared to the motor; slower speeds, lower rise
• Gearless traction: Motor drives the sheave directly; high speed (up to 2,000 fpm), tall buildings
Hydraulic Elevators
Hydraulic fluid drives a piston under the cab. Limited to approximately 60 feet of rise (4–6 stories). Slower than traction elevators but lower installation cost. Not appropriate for high-rise applications.
Machine Room-Less (MRL) Traction
Gearless traction system with the motor located in the overhead portion of the hoistway or in a control space at the top floor. Eliminates the overhead machine room, reducing building height or adding usable floor area. Most new mid-rise commercial elevators are MRL.
Accessible Means of Egress and Fire Service (§1009, §3007, §3008)
Elevators as Accessible Means of Egress (§1009.4)
In buildings where the only accessible route to an upper floor is by elevator, the elevator constitutes a required element of the accessible means of egress. Requirements for this use:
• The elevator must be on standby or emergency power per §2702
• Two-way communication must be provided at each landing (§1009.8)
• The elevator must comply with fire service recall provisions per ASME A17.1
Fire Service Access Elevators (§3007)
Required in all high-rise buildings (buildings with occupied floors above 55 feet). At least one elevator in each bank must meet §3007 requirements:
• Lobby: A protected elevator lobby at each floor, with 1-hour fire barriers and smoke partitions
• Cab dimensions: Minimum 84 inches wide × 60 inches deep (wide enough for a stretcher flat)
• Two-way communication: Between the cab, machine room, and fire command center
• Water protection: The cab interior and hoistway equipment must be protected against water intrusion from sprinkler system activation (ASME A17.1 Part XXVII provisions)
• Standby power: The fire service elevator must be on standby power
• Emergency recall: Phase I (automatic recall to designated level) and Phase II (firefighter operation) controls per ASME A17.1
Occupant Evacuation Elevators (§3008)
New in IBC 2012 and significantly refined since — for buildings with occupied floors over 420 feet above grade, the IBC requires occupant evacuation elevators. These systems must:
• Serve all occupied floors above the transfer floor
• Be in a protected lobby with two-way communication
• Be on emergency power
• Remain operational while firefighters are conducting operations on other floors (complex traffic management requirements)
• Meet ASME A17.1 Section 2.27 provisions for occupant evacuation operation
Escalators and Moving Walks (§3005)
Escalators are governed by ASME A17.1 Part IX. They are not accessible means of transportation (ADA prohibits reliance on escalators for accessibility) and cannot substitute for an elevator for accessibility compliance.
IBC §3005.1 requires that escalator floor openings be enclosed with either:
• 1-hour fire-resistance-rated construction (most common — a rated enclosure around the escalator opening at each floor)
• OR an automatic sprinkler system designed to create a water curtain across the opening (less common — requires approval)
Where escalators are within an atrium, the atrium smoke control provisions of §404.5 govern.
Inspection and Maintenance
ASME A17.1 requires periodic inspection and testing of all elevators. States typically adopt inspection programs through their labor department or building department:
• Annual inspection: Safety devices, limits, buffers, door operation, and emergency systems
• 5-year test: Full load test with safety devices active
• Monthly: Oil levels, cab lighting, phone operation (for building maintenance)
The elevator inspection certificate must be posted in the elevator cab (required by most state elevator safety laws).
Research Elevator Code Requirements for Your Project
Elevator requirements depend on building height, accessibility requirements, and occupancy. Melt Code lets you search IBC Chapter 30, ASME A17.1 references, and your jurisdiction's elevator safety code amendments together.
Frequently Asked Questions
An elevator is required when a building has occupied floors above the grade floor that must be accessible under ADA and IBC §1104.4. The ADA requires that each level of a multi-story building be accessible unless an exception applies — the most common exception is for buildings with fewer than three stories and no medical office or shopping mall. For most commercial buildings with occupied upper floors, an elevator is required.
ADA Section 4.10 and IBC §1009.4 require that elevators serving as accessible means of egress have a minimum clear inside cab dimension of 80 inches wide × 54 inches deep. Fire service elevators (§3007) have a larger minimum: 84 inches wide × 60 inches deep (to accommodate a stretcher).
Yes — ASME A17.1 Part XXVII addresses machine room-less elevators comprehensively, and IBC §3002.3 allows MRL systems. The machine space within the hoistway must still be accessible for service and maintenance per ASME A17.1 requirements.
Yes — IBC §3007.6 requires a fire service elevator lobby at every floor served by the fire service elevator. The lobby must be enclosed with fire barriers and smoke partitions; the lobby serves as a protected staging area for firefighters entering or exiting the elevator on each floor.
No. Escalators are not considered accessible means of transportation under the ADA. Buildings cannot rely on escalators to satisfy the accessible route requirements — an elevator, ramp, or accessible lift is required where a change in level must be accessible.
References
1. International Code Council — IBC 2024, Chapter 30: Elevators and Conveying Systems
https://codes.iccsafe.org/content/IBC2024P1/chapter-30-elevators-and-conveying-systems
2. ASME — ASME A17.1/CSA B44-2022: Safety Code for Elevators and Escalators
3. IBC 2024, §3007: Fire Service Access Elevator
https://codes.iccsafe.org/content/IBC2024P1/chapter-30-elevators-and-conveying-systems#IBC2024P1Ch30Sec3007
4. IBC 2024, §3008: Occupant Evacuation Elevators
https://codes.iccsafe.org/content/IBC2024P1/chapter-30-elevators-and-conveying-systems#IBC2024P1Ch30Sec3008
5. ADA.gov — ADA Standards for Accessible Design, Section 4.10: Elevators
https://www.ada.gov/law-and-regs/design-standards/2010-stds/
6. UpCodes — IBC 2024 Chapter 30 (searchable text)
https://up.codes/viewer/california/ibc-2024/chapter/30/elevators-and-conveying-systems