Key Takeaways
- CSA B651 is the Canadian standard for barrier-free design of the built environment, referenced by NBC 2020 Section 3.8 and provincial codes (OBC, CCQ, BCBC, ABC).
- Minimum clear opening: 800 mm (32 inches) — measured from the open door face to the strike jamb at 90° opening, not the frame width.
- Maximum opening force: 22 N (5 lbf) on accessible-route doors, 38 N (8.5 lbf) on interior doors.
- Hardware reach range: 800-1,100 mm AFF — door pulls, lever handles, push-pads, and operator actuators must fall within this range.
- Threshold maximum: 13 mm with a beveled edge — anything taller requires a power operator or ramp.
- Power-operated doors are the standard solution for primary public entrances; AODA mandates them on Ontario buildings ≥ 300 m².
A door that meets CSA B651 is a door that lets every Canadian use it — wheelchair, walker, cane, parent with stroller, delivery worker with a cart. The standard is referenced by every provincial building code and audited at occupancy permit. This guide is a specifier's reference for the dimensional, force, and hardware requirements that determine whether your commercial door passes accessibility inspection.
What CSA B651 covers
CSA B651 — Accessible design for the built environment is published by the Canadian Standards Association and referenced by NBC 2020 Section 3.8 (Barrier-Free Design). It provides dimensional and performance requirements for:
- Doors and door hardware
- Door operators and activation devices
- Thresholds and floor transitions
- Vestibule design and door spacing
- Signage and tactile-warning surfaces
For commercial doors specifically, the relevant sections are:
- Section 5.2 — Door clear opening
- Section 5.3 — Door opening force
- Section 5.5 — Door hardware
- Section 5.6 — Thresholds
- Section 5.7 — Power-operated doors
- Section 5.8 — Vestibule depth and door spacing
Clear opening — 800 mm minimum
Clear opening is the unobstructed width of the doorway when the door is open at 90°, measured from the open door face to the strike jamb. Not the frame width or the door width.
For a typical 3'0" × 7'0" hollow metal door:
- Door width: 914 mm (3'0")
- Frame opening: 921 mm (3'0-1/4")
- Clear opening at 90°: ~800-810 mm (after deducting door thickness, hinge reveal, hardware projection)
This means a 3'0" door barely meets CSA B651's 800 mm minimum. For comfortable wheelchair maneuverability, specifiers typically upgrade to:
- 3'4" (1,016 mm) door — 920 mm clear opening, 12% margin above minimum
- 3'6" (1,067 mm) door — 970 mm clear opening, hospital and high-traffic accessible standard
AODA Ontario supplement raises the minimum to 850 mm — pushing the de-facto standard from 3'0" to 3'4" or 3'6" on Ontario projects.
For double-leaf doors, the active leaf must independently meet 800 mm clear opening — the inactive leaf can't be counted toward accessibility unless it has a flush or panic-bar operator.
Opening force — 22 N (5 lbf) on accessible routes
CSA B651 Section 5.3 specifies maximum opening force:
- Accessible-route doors — 22 N (5 lbf) at the door pull/handle, measured perpendicular to door face
- Other interior doors — 38 N (8.5 lbf)
- Exterior doors — exempt from force limit if power-operated; otherwise 38 N on the interior face
This force limit applies to operating the door, not the latching hardware. A door with a heavy closer (DC120 or DC130 spring closer) typically tests at 30-40 N — over the accessible-route limit. Solutions:
1. Lower-force closer — DC60 or DC80 closers reduce force to 18-25 N. Tradeoff: door may not reliably close in fire-rated applications (closer must be sized to overcome the latch). 2. Power assist — adds a power operator that contributes to opening, allowing a heavier closer for fire-rating compliance while maintaining accessibility. 3. Power operator — full automatic operation; opening force becomes irrelevant from the user perspective. See Door Operators.
For fire-rated assemblies the closer must be sized to overcome the latch. This typically pushes opening force to 30-40 N — above the accessible-route limit. The standard solution is a power assist or power operator (ANSI A156.19 low-energy is the common choice for accessibility-driven retrofit). See ANSI A156.10 vs A156.19.
Hardware reach — 800 to 1,100 mm AFF
Section 5.5 specifies the height range for door operating hardware:
- Door pulls and handles — centered between 800 and 1,100 mm above finished floor (AFF)
- Lever handles — preferred over knobs; knobs are non-compliant for accessibility
- Push-pads (operator actuators) — must fall within 800-1,100 mm AFF, with appropriate reach distance from any obstruction (200-450 mm from edge per CSA B651 5.7)
- Panic bars / exit devices — typical mounting at ~900 mm AFF; meets accessibility
The reach range derives from wheelchair user reach studies — a seated user can comfortably reach 800-1,100 mm AFF without overextending or stooping.
Common compliance failures:
- Standard residential-style doorknob installed on a commercial accessible door (knob is not compliant — must be lever)
- Panic bar mounted at non-standard height (some manufacturers install at 1,200+ mm — out of range)
- Push-pad operator mounted on a return-wall less than 200 mm from the door — accidental activation by people walking past
Thresholds — 13 mm maximum, beveled
Section 5.6 specifies threshold height:
- Maximum height: 13 mm (1/2 inch) above adjacent floor surface
- Beveled edge: required at any threshold over 6 mm (1/4 inch)
- Slope of bevel: 1:2 maximum (rise:run)
Anything taller than 13 mm requires:
- A ramp meeting CSA B651 ramp slope (1:12 maximum, with handrails)
- A power operator that opens the door fully out of the threshold path
- Threshold redesign (recessed track, flush-mount transition strip)
For exterior storefront doors, threshold compliance often requires a half-saddle threshold profile (13 mm interior, beveled exterior) plus weatherseal.
Power-operated doors — primary public entrances
Section 5.7 specifies power-operated door requirements:
- Activation device — push-pad, wave sensor, or motion-detection; must be at 800-1,100 mm AFF, 200-450 mm from any obstruction
- Door open time — minimum 5 seconds at full open before automatic close (longer than ANSI A156.19's 3 seconds — CSA B651 is more conservative)
- Closing speed — minimum 5 seconds full close
- Force at obstruction — maximum 67 N (15 lbf), per ANSI A156.19 low-energy
- Activation distance — push-pad must be reachable without entering the door swing path
Vestibule depth — Section 5.8 requires a minimum 1,200 mm clear depth between two consecutive doors (e.g., outer storefront door and inner lobby door). Less than 1,200 mm and a wheelchair can't fit between them while one door is closing.
AODA — Ontario's accessibility supplement
The Accessibility for Ontarians with Disabilities Act (AODA) adds requirements above CSA B651 for Ontario commercial buildings:
- Power-operated doors mandatory at primary public entrance of buildings ≥ 300 m² floor area
- Clear opening raised to 850 mm minimum (vs CSA's 800 mm)
- Opening force maximum 38 N at interior doors, 22 N at accessible-route doors (matches CSA)
- Mandatory accessible signage — Braille and tactile signage on all permanent room identification
AODA applies to all new commercial construction and major renovations in Ontario, audited at occupancy permit. Non-compliance carries financial penalties and can prevent occupancy permit issuance.
For Toronto, Mississauga, Ottawa, Hamilton, Markham, Vaughan, Oakville, and all 16 Ontario cities we serve, AODA + CSA B651 governs commercial-door accessibility specs.
Quick spec card
| Requirement | CSA B651 (federal/most provinces) | AODA Ontario supplement |
|---|---|---|
| Clear opening | 800 mm minimum | 850 mm minimum |
| Opening force (accessible route) | 22 N | 22 N |
| Opening force (interior) | 38 N | 38 N |
| Hardware reach height | 800-1,100 mm AFF | 800-1,100 mm AFF |
| Threshold height | 13 mm max, beveled if > 6 mm | 13 mm max, beveled if > 6 mm |
| Power operator at primary entry | Recommended | Mandatory if building ≥ 300 m² |
| Vestibule depth | 1,200 mm minimum | 1,200 mm minimum |
| Power operator open time | 5 seconds minimum | 5 seconds minimum |
| Knob vs lever | Lever required (knobs non-compliant) | Lever required |
Frequently Asked Questions
Does my 3'0" door meet CSA B651?
Marginally. A 3'0" (914 mm) door yields ~800-810 mm clear opening at 90°, which just meets CSA B651's 800 mm minimum but fails AODA Ontario's 850 mm. For Ontario projects, specify 3'4" or 3'6". For other provinces, 3'0" is technically compliant but tight — most architects upgrade to 3'4" anyway for usability.
Is my fire-rated door automatically non-compliant for accessibility?
Not automatically — but the heavier closer required for fire-rating typically pushes opening force above the 22 N accessible-route limit. The standard solution is to add a power assist or power operator (low-energy ANSI A156.19) that brings effective opening force to under 22 N. See Door Operators and ANSI A156.10 vs A156.19.
What about emergency-egress doors?
CSA B651 still applies. Emergency egress doors must meet clear-opening minimum and panic-hardware reach requirements. The push-bar (panic device) is mounted at ~900 mm AFF, within the 800-1,100 mm reach range.
How is compliance verified?
At occupancy permit inspection for new construction or major renovations. Inspectors physically test:
- Clear opening with a measuring tape at 90° door swing
- Opening force with a force gauge at the door handle
- Hardware reach with a measuring tape from finished floor
- Threshold height with a level
Failure typically means re-work before occupancy — replacing closers, lowering thresholds, adding power operators. We document compliance on every install with a written CSA B651 / AODA verification report.
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Related reading: ANSI A156.10 vs A156.19 — Automatic Door Standards · Provincial Code Variations for Commercial Doors · NFPA 80 Fire Door Inspection · Standard Commercial Door Sizes Canada
Related products: Automatic Doors · Automatic Sliding Doors · Door Operators · Hollow Metal Doors · Storefront Doors
Service area: All 61 Canadian cities — including Toronto, Mississauga, Markham, Vaughan, Oakville, Burlington, Milton, Montreal, Vancouver, Calgary, and Edmonton. Every install includes written CSA B651 / AODA compliance documentation.
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FAQ
Is CSA B651 mandatory in all provinces?
Indirectly yes. Ontario (AODA) and Quebec (RBQ) explicitly reference B651. BC (BCBC accessibility section) aligns with B651. Other provinces reference NBC accessibility provisions which mirror B651.
Does B651 require power-operated doors at every entrance?
No. B651 requires that at least one accessible entrance be reachable by a person using a wheelchair without manual door operation. A manual door with code-compliant force (≤22 N interior) plus a power-assist button option satisfies B651.
What's the most common B651 retrofit fail?
Push button installed outside the 800–1100 mm height range, or less than 300 mm from the door (hand-crush risk during closing). Both are quick fixes during the install certification visit.