CAN-ASC-2.2 – Emergency Egress (Exit)
12. Built environment
Information
Table of contents
The means of egress from all floors to an accessible path of travel and muster point shall be designed in conformance with this Clause.
12.1 Areas of refuge
12.1.1 Application
Buildings shall be provided with areas of refuge on levels above and below the level served by an immediate accessible exit and egress path of travel leading directly outside.
Sprinklers provided in buildings shall not be considered an acceptable form of refuge.
12.1.1.1 Number of areas of refuge
The number of areas of refuge on each storey shall be provided based on half the number of exits required by the applicable building code serving that storey.
Note: Decimal numbers should be rounded up to the nearest whole number.
Other considerations:
- the building use; and
- the anticipated number of visitors.
12.1.2 Location of the areas of refuge
An area of refuge shall be located:
- within an exit stair shaft, provided it is outside the egress width required by the applicable building code so that direct access is provided to an exit, or a firefighter or occupant evacuation elevator required by the applicable building code; or
within a fire compartment that is separated from the remainder of the floor area by a fire separation having a fire-resistance rating not less than that required by the applicable building code for an exit enclosure on the same storey so that direct access is provided to:
- a firefighter elevator required by the applicable building code; or
- an occupant evacuation elevator in conformance with ASME A17.1-2019/CSA B44:19.
Note: An example of a fire compartment in this Clause includes an elevator lobby.
Note: The travel distance to an area of refuge should be considered.
12.1.3 General
Areas of refuge shall be:
- located on an accessible route;
- smoke-protected;
- illuminated at a minimum of 200 lux; and
- provided with an evacuation device nearby.
12.1.4 Doors serving an area of refuge
A door serving an immediate area of refuge shall:
- be leakage-rated complying with NFPA 105;
- have a clear width complying with CSA/ASC B651;
- be equipped with a power door operator capable of being activated in the event of a loss of power via emergency power or alternative power source; and
- be located clear of any adjacent door swing and away from pedestrian exit routes.
12.1.5 Interior of areas of refuge
The interior of an area of refuge shall:
- provide a minimum of two waiting spaces to accommodate a clear unobstructed floor space not less than 900 mm by 1500 mm for each space;
- be served by a 2100 mm turning radius;
- be located clear of any adjacent door swing;
- be illuminated, minimum 200 lux;
- be connected to the backup power; and
- be free of protrusions.
12.1.6 Clear waiting space
The clear waiting space shall:
- be connected to the accessible path of travel;
- be recessed away from the common path of travel;
- be positioned to avoid someone being directly in front of or behind another individual;
- be clearly delineated along the floor;
- not be located directly facing the stairs or behind the exit door; and
- have separate emergency lighting and ventilation systems supported by a backup generator.
12.1.7 Areas of refuge communication
A communication system shall:
- be provided in each area of refuge;
- be equipped with a hands-free two-way communication system that is at a maximum height of 1200 mm;
- provide feedback to occupants acknowledging receipt of their communication (similar to an elevator);
- be adjacent to a clear space of 900 x 1500 mm;
- be connected to backup power;
- be connected to an emergency response system;
- have a two-way texting system complying with International Telecommunications Union (ITU) V.18, “Operational and interworking requirements for DCEs operating in the text telephone mode,” to support people who are Deaf, deafblind or hard of hearing; and
- be linked to security or emergency call centre.
A communication system should be equipped with a volume control device.
12.1.8 Signage
An area of refuge shall have an identification sign on the door stating AREA OF REFUGE with the International Pictogram of Access.
An additional sign shall be posted on the side of the door, complying with CSA/ASC B651.
12.1.8.1 Directional signage
Emergency egress directional signage to the area of refuge shall be provided at decision points throughout the building.
12.2 Exit doors
All doors along the egress route shall comply with CSA/ASC B651 and the NFC. They shall be equipped with power operators.
Doors and doorways provided along an accessible egress path of travel, including but not limited to doors forming part of fire separations, serving areas of refuge and muster points, etc., or a combination thereof, shall comply with this Standard.
Doors forming part of an egress route shall be:
- provided with a vision panel or side light with its bottom edge not higher than 900 mm;
Where doors forming part of an egress route are fully transparent, they shall be marked across the entire width of the door with a minimum of 50 mm high luminance contrasting strip at two different heights of 900 mm above finished floor and 1350 mm above finished floor.
Where doors form part of an accessible egress path of travel they shall be equipped with impact-resistant high-contrasting kick plates with rounded edges that span the width of the door for a height from the bottom of the door of not less than 250 mm.
An accessible exit door, discharging to the exterior of a building or another building through a horizontal accessible exit shall:
- have an accessible sign complying with Clause 16.5.2;
- discharge directly to the exterior, lead to an accessible exterior path of travel and the exterior muster point and the public way; and
- if discharging to another building, lead to an accessible path of travel that complies with this Standard.
Automatic sliding doors forming part of an accessible egress path of travel shall be capable of opening or remaining open in the event of an emergency either manually or through a break away feature.
No entrance/exit doors shall be locked, including the inactive leaf of a multiple-leaf door.
12.2.1 Power door operators on horizontal exit doors
Exit doors discharging to the exterior of a building or another building through a horizontal exit (all of which shall be accessible) shall be equipped with a power door operator and emergency power backup.
All egress route doors shall be equipped with power door operators.
In existing building, power-operated doors not equipped with standby, or emergency power shall be equipped with an integral or separate listed releasing device that shall automatically disconnect the door from the control of the power operator at the time of an emergency.
12.3 Egress path of travel
Where stairs or ramps are present along the exterior or interior path of travel, they shall comply with Clauses 12.5 and 12.7 of this Standard.
12.3.1 Interior egress path of travel
The interior egress path of travel shall comply with CSA/ASC-B651.
Static escalators, stair lifts and moving walks shall not be permitted as part of the interior egress path of travel.
All elements in the interior egress path of travel shall be accessible, including:
- to and from all floor areas of a building; and
- to and from all interior doors to exterior exit doors.
In addition, the interior egress path of travel shall:
- where there is a rise over 13 mm, have a slope of no steeper than 1:25. See Ramps 12.7;
- be free of protrusions to a height of 2100 mm;
- be illuminated to a minimum level of 200 lux; and
- be free of overly patterned carpeting.
12.3.2 Exterior egress path of travel
The slope and cross slope of the exterior egress path of travel shall comply with CSA/ASC B651.
The exterior egress path of travel between the accessible building exits, the exterior muster points and the public right of way shall be:
- a maximum distance between 45 - 60 m to travel;
- free of barriers; and
- be illuminated to a minimum level of 200 lx.
12.4 Muster points
All buildings shall have muster points served by an accessible exterior egress path of travel.
The muster point shall be a minimum of 3000 mm x 3000 mm.
Signage with the muster point symbol shall be provided between 1600 mm and 2500 mm above the ground surface.
Signage identifying the muster points shall be identified on the emergency fire safety map posted throughout the building.
Benches or seating provided for the muster point shall comply with CSA/ASC B651.
The muster point shall:
- be provided with a rest area equipped with a bench or seating alternative;
- have a pavement marking not less than 1 m by 1 m identifying the international symbol of muster points, where located on a hard surface;
- be illuminated; and
- be recessed away from and served by an exterior egress path of travel complying with Clause 12.3.2.
12.5 Stairs
All stairs shall comply with CSA/ASC B651, the NBC, and relevant provincial codes and standards.
Note: Buildings that have a single stairwell shall provide either:
- an area of refuge on each floor above the exit floor; or
- an occupant evacuation elevator complying with Clause 15.3.
12.5.1 Exterior stairs on accessible egress path of travel
Exterior stair treads and landings shall comply with CSA/ASC B651 and shall be designed in compliance with interior stairs.
Exterior stairs leading to the muster point and public way shall be accompanied by a ramp complying with Clause 12.7.
Exterior stairs shall have a minimum of 3 risers.
12.5.2 Interior stairs
Interior stairs shall comply with CSA/ASC B651.
Additionally, the following requirements shall be met:
- The clear height of a stair shall be 2,400 mm minimum.
- The clear width of a stair shall be 1,650 mm minimum.
- The height of landings shall be a minimum of 3,700 mm.
12.6 Handrails
Handrails shall be designed in compliance with CSA/ASC B651.
12.6.1 Tactile information on stair and ramp handrails
Stair and ramp handrails shall have raised characters with braille permanently fixed on the underside of the horizontal section, at the beginning and at the end of every handrail on stairs indicating:
- the floor number;
- the direction of egress; and
- the exit floor shall be indicated by a tactile star.
12.7 Ramps
Ramps shall comply with CSA/ASC B651.
An exterior accessible egress path of travel shall have a slope not more than 1:20, and if greater it shall be designed as a ramp with a slope not greater than 1:15.
Where there are cross slopes, they shall be a maximum of 1:50.
Ramps shall:
- be equipped with handrails, complying with Clause 12.6;
- include a tactile warning surface indicator at the top of the ramp;
- be illuminated to a minimum level of 200 lux; and
- be at least 30% luminance (colour) contrasted with their surroundings.
12.7.1 Landings at ramps
A level landing shall be illuminated to a minimum level of 200 lux.
12.7.2 Ramp handrails
Handrails on ramps shall comply with the requirements of CSA/ASC B651.
In addition, ramps shall:
- have handrails on both sides with a clear width between the handrails of 1200 mm, and a clear width below the handrails of at least 1210 mm; and
- comply with tactile information requirements of 12.6.1.