Accessibility (NBC 2020)

Accessibility on the ExAC: the two sub-categories you need to know

Examitect's ExAC study plan splits Accessibility into two sub-categories. Both appear in Section 2 in multiple choice, multi-select, scenario-based, calculation, and short-answer formats. They draw on NBC 2020 Section 3.8, Division A definitions, and the Section 3.4 egress coordination that sub-category 5.12 specifically highlights.

Section 3.8 sits in Division B, Part 3 of the NBC. It is organized in three subsections: 3.8.1 Scope, 3.8.2 Application (which buildings and areas must be barrier-free), and 3.8.3 Design (the specific dimensions and criteria). Most exam questions test 3.8.2 and 3.8.3. You also need Division A 1.4.1.2 for the definition of "barrier-free" and Section 3.4 for how exits coordinate with barrier-free egress.

What barrier-free design is, and what it requires

Barrier-free design is the NBC's approach to ensuring that buildings are usable by people with physical or sensory disabilities, including wheelchair users and people with mobility aids. Section 3.8 is not about general accessibility philosophy; it is a set of specific dimensional and operational requirements that you apply during design. The NBC gives you a clear list of what must be barrier-free (3.8.2) and exactly how to design it (3.8.3).

The term "barrier-free" is defined in NBC Division A, Article 1.4.1.2. A barrier-free design means that a person with a physical or sensory disability can approach, enter, and use a building independently. The barrier-free path of travel connects the exterior accessible route (from parking or the street) through a barrier-free entrance and along corridors to all areas required by 3.8.2 to be accessible. The path must be continuous, without steps or abrupt level changes, wide enough for a wheelchair, and served by compliant doors, ramps, and elevating devices where needed.

5.11 Apply accessibility requirements in building design

What sub-category 5.11 tests. Sub-category 5.11 of Examitect's ExAC study plan, taken from the CACB blueprint, is "Apply accessibility requirements in building design." The primary reference is NBC 2020 Section 3.8, especially 3.8.2 (Areas Requiring a Barrier-Free Path of Travel), 3.8.3.2 to 3.8.3.9 (path, ramp, door, elevator, control, and sign design), and the washroom and bathing articles 3.8.3.12 to 3.8.3.17. The supplementary references are Architectural Graphic Standards 12th edition and The Architect's Studio Companion 6th edition, Section 5 Part 1.

Sub-category 5.11 questions ask you to apply these requirements to a design scenario: which areas need a barrier-free path, what dimensions a door or ramp must meet, when a universal washroom is required, or how many wheelchair spaces an assembly occupancy needs. Expect multiple choice, multi-select, dimension-identification, and scenario questions.

Which buildings and areas require a barrier-free path of travel

NBC 3.8.2.1 sets the application. Section 3.8 applies to all buildings except:

• Detached houses, semi-detached houses, houses with a secondary suite, duplexes, triplexes, townhouses, row houses, and boarding houses
• Buildings of Group F Division 1 major occupancy (high-hazard industrial)
• Buildings not intended to be occupied on a daily or full-time basis (pump houses, substations, automatic telephone exchanges)

All other buildings, including Group A (assembly), B (care or detention), C (residential), D (business and personal services), E (mercantile), and F Division 2 and 3 (medium- and low-hazard industrial) must comply. Note that Group C residential applies, but with important exceptions: a barrier-free path is not required within suites of residential occupancy unless the authority having jurisdiction designates specific suites as accessible.

Within a covered building, NBC 3.8.2.3 requires a barrier-free path from the barrier-free entrance throughout the entrance storey and all other normally occupied floor areas. However, a barrier-free path is not required to: service rooms, elevator machine rooms, janitors' rooms, service spaces, crawl spaces, attic or roof spaces; the floor level above or below the entrance level in 2-storey buildings under certain conditions; parking levels without barrier-free parking; high-hazard industrial occupancies; or portions of floor areas with fixed seats that are not part of the path to wheelchair spaces.

Entrances: NBC 3.8.2.2

All pedestrian entrances to a barrier-free storey must be barrier-free, except service entrances and entrances to suites excluded under 3.8.2.3(2)(l). Each barrier-free entrance must connect to a barrier-free exterior path of travel and must be designed to Subsection 3.8.3. Where there are multiple doorways at one entrance, only one needs to comply. Pedestrian bridges and walkways between two barrier-free storeys in different buildings must also be barrier-free.

Barrier-free path dimensions: NBC 3.8.3.2

The design dimensions for the path of travel are in 3.8.3.2. Memorize these numbers for the exam.

Ramp requirements: NBC 3.8.3.5

A barrier-free ramp must have a clear width of at least 1000 mm, a slope no steeper than 1 in 12, and level areas at the top, bottom, and intermediate landings at doors. The landing at a door must be at least 1700 mm by 1700 mm. On the latch side of a door that opens toward the ramp, the level area must extend at least 600 mm beyond the door opening. On the latch side of a door that opens away, at least 300 mm. Intermediate rest landings at least 1350 mm long are needed at intervals no greater than 9 m and at abrupt direction changes. Handrails must be 865 mm to 965 mm high on both sides. Ramp and landing surfaces must be hard or resilient when the slope exceeds 1 in 15, must drain where exposed to water, and must have edge protection (a curb at least 75 mm high or a barrier within 100 mm of the surface).

Door requirements: NBC 3.8.3.6

Every door in a barrier-free path must have a clear opening width of at least 850 mm when open. Door hardware must be operable with one hand in a closed-fist position (no tight grasping, pinching, or wrist-twisting) and mounted at 900 mm to 1100 mm above the floor. When unlatched, interior swinging doors must open with a force of no more than 22 N; exterior swinging doors no more than 38 N. Interior door closers must give a closing period of at least 3 s from 70 degrees open to 75 mm from closed. Thresholds must be no more than 13 mm high and must be bevelled. Vestibules must provide 1350 mm clear between doors plus the width of any door that swings into the vestibule space. Door frames must provide visual contrast with adjacent walls (except in areas serving people with cognitive disabilities).

Power door operators: NBC 3.8.2.7

Power door operators are required at barrier-free entrances (including vestibule interior doors), along the barrier-free path of travel from the entrance to suite or room doors served by public corridors, and at entrances to washrooms with accessible water closets. Controls must be in the barrier-free path, marked with the International Symbol of Access, 150 to 300 mm or 900 to 1100 mm above the floor, clear of the door swing within 1500 mm, and operable by touching any part of their surface with a fist, arm, or foot.

Washroom requirements: NBC 3.8.2.8

Wherever washrooms are provided in a storey requiring a barrier-free path, at least one universal washroom complying with 3.8.3.13 must be provided. Where a washroom has more than two water closets or a combination of more than one water closet and one urinal, at least one accessible stall (3.8.3.12) is also required. A universal washroom must have a turning circle of 1700 mm, a water closet with its centre line 460 to 480 mm from the side wall, an L-shaped grab bar on the side wall, a compliant lavatory with knee clearance, and a door with an emergency-release locking mechanism. In buildings with Group A, B Division 2, or Group E occupancies with an occupant load over 500, a universal washroom on the main entrance storey must include an accessible change space.

Wheelchair spaces in assembly occupancies: NBC Table 3.8.2.3

In assembly occupancies with fixed seating, the number of designated wheelchair spaces is set by Table 3.8.2.3. The table is the source of exam calculation questions.

In assembly occupancies with more than 25 fixed seats, rows served by two aisles must also have one adaptable seat adjacent to an aisle. At least 5 percent of those adaptable seats (but no more than 20) must adjoin a barrier-free path.

5.12 Understand barrier-free design provisions

What sub-category 5.12 tests. Sub-category 5.12 of Examitect's ExAC study plan, taken from the CACB blueprint, is "Understand barrier-free design provisions." The primary references are NBC 2020 Division A 1.4.1.2 (definition of barrier-free), NBC 2020 Section 3.4 (Exits, where barrier-free egress coordination may apply), and NBC 2020 Section 3.8 Accessibility. The supplementary references match 5.11.

Sub-category 5.12 goes deeper than application: it tests whether you understand the provisions at a conceptual level. Expect questions about what "barrier-free" means in Division A, how the definition affects design decisions, and how barrier-free egress coordinates with Section 3.4 exit requirements. Expect definition questions, provision-identification questions, and coordination scenarios.

The Division A definition of barrier-free

NBC Division A, Article 1.4.1.2 defines "barrier-free" as: designed to allow persons with physical or sensory disabilities to approach, enter, and use a building or facility. This definition drives the entire 3.8 regime. It is not about universal design or inclusive design in a broad sense; it is a specific, code-defined term with a specific meaning in the NBC hierarchy. When the code says a space or path must be "barrier-free," it means it must comply with Subsection 3.8.3 in its entirety or with the corresponding CSA B651 provisions listed in Table 3.8.3.1.

CSA B651 as an alternative compliance path

NBC 3.8.3.1 gives two paths to compliance. You can either follow the NBC's own Subsection 3.8.3 provisions (the path most Canadian architects use), or you can design to CSA B651 "Accessible Design for the Built Environment" in its entirety for each applicable element. Table 3.8.3.1 maps NBC articles to their CSA B651 equivalents. The two paths are not mixed: if you invoke CSA B651 for ramps, you must use it for all ramp requirements, not cherry-pick clauses.

Passenger-elevating devices: NBC 3.8.3.7

Where a barrier-free path requires vertical travel, NBC 3.8.3.7 governs the elevating device. The device must conform to CSA B355 (Platform Lifts and Stair Lifts for Barrier-Free Access), have a clear floor space of at least 1500 mm long by 1000 mm wide inside the car, and have entry doors with a clear opening of at least 850 mm (short side) or 1000 mm (long side entry). The requirement for escalator access is in 3.8.2.4: where an escalator or inclined moving walk provides floor-to-floor access, a barrier-free path must also be provided to the same level, and clear signs must indicate its location.

Accessible controls: NBC 3.8.3.8

Controls required by Section 3.8 must be operable with one hand in a closed-fist position, without tight grasping, pinching, or wrist-twisting, and with a force no more than 22 N. They must be mounted 400 mm to 1200 mm above the floor, adjacent to a clear floor space of 1350 mm by 800 mm, and positioned in or adjacent to the barrier-free path. Where controls provide a feedback signal, it must be both audible and visible. This clause applies to door hardware, elevator controls, intercom buttons, faucets, and thermostats throughout the barrier-free area.

Accessible signage: NBC 3.8.3.9

Visual information signs at barrier-free facilities (entrances, washrooms, parking, elevators, assistive listening systems) must comply with CSA B651 clauses on contrast, character height, and placement. Tactile signs at or near doors must include Braille and tactile characters, be mounted on the latch-side wall or the nearest right-side wall, and be centred 1500 mm above the finished floor with the sign edge no more than 300 mm from the door. Signs must incorporate the International Symbol of Access or the International Symbol of Access for Hearing Loss. Directional signs must provide visual information in accordance with 3.8.3.

Coordination with Section 3.4: barrier-free egress

Sub-category 5.12 specifically cites Section 3.4 for barrier-free egress coordination. The key intersection is at exit doors. Exit doors that form part of a barrier-free path must have door hardware operable with a closed fist and complying with 3.8.3.8.(1)(b): no tight grasping or wrist-twisting required. Tactile and visual information signs required by 3.4.5 and 3.4.6 must also comply with 3.8.3.9. NBC 3.8.2.3.(2)(g) requires that where a floor area above or below the entrance level is 600 sq m or more, contains an assembly occupancy of more than 100 sq m, or contains facilities integral to the principal function of the entrance level, a barrier-free path must reach that floor. This means elevator or platform lift provision is required in those cases even if the building is only 2 storeys. Article 3.3.1.7 then adds protection measures, such as a fire-protected elevator or fire-separated zones, where a floor area above or below the first storey is not sprinklered throughout and has a barrier-free path of travel. Coordinate exits and the barrier-free path in plan early: they often share corridors, and the requirements of both sections apply simultaneously.

Accessible washroom design in detail

Washroom questions are among the most frequently tested in Accessibility because the dimensions are specific and the distinction between a universal washroom (3.8.3.13) and an accessible stall (3.8.3.12) is a common exam trap.

Accessible water-closet stall: NBC 3.8.3.12

An accessible stall within a multi-stall washroom must be at least 1500 mm wide by 1500 mm deep, with a clear lateral transfer space of at least 1500 mm long and 900 mm wide adjacent to the water closet. A clear floor space of 1700 mm by 1700 mm is required in front of the stall door. The water closet centre line must be 460 mm to 480 mm from the side wall. An L-shaped grab bar with horizontal and vertical components at least 760 mm long is required on the side wall closest to the water closet, with the horizontal component at 750 mm to 850 mm above the floor. A rear grab bar (at least 600 mm long or two 300 mm bars) is mounted on the back wall. The stall door clears 850 mm when open and is self-closing to no more than 50 mm ajar.

Universal washroom: NBC 3.8.3.13

A universal washroom is a self-contained single-occupancy room. It must be served by a barrier-free path, have a turning circle of 1700 mm inside the room, a water closet conforming to 3.8.3.14 (seat 430 to 460 mm above floor, flushing control 500 to 900 mm above the floor and no more than 350 mm from the transfer side), a compliant lavatory with knee clearance (735 mm high at front edge, 685 mm at 200 mm back), grab bars per 3.8.3.12.(1)(f) and (g), a coat hook at no more than 1200 mm, a toilet paper dispenser, and an emergency-release locking mechanism on the door.

Shower and bathing: NBC 3.8.3.17

Where showers are provided, at least one stall per group must comply with 3.8.3.17. The accessible shower must be at least 1500 mm wide and 900 mm deep, have a slip-resistant floor and a threshold no more than 13 mm high, and include a hinged or fixed seat at least 450 mm wide and 400 mm deep. Two grab bars are required: one vertical bar at least 1000 mm long on the side wall, and one L-shaped bar on the wall opposite the entrance with a horizontal member at least 1000 mm long at 750 to 870 mm above the floor. A clear entrance floor space of 900 mm deep by the shower width must be provided outside the shower, free of doors or curtains that obstruct controls.

Passenger-elevating devices, controls, and signage

This card covers the three NBC provisions that test your knowledge of vertical travel and interface design for accessibility.

Passenger-elevating devices: the floor-space and door rules

Under NBC 3.8.3.7, a passenger elevator or platform-equipped elevating device in a barrier-free path must conform to CSA B355, have a car floor space of at least 1500 mm long by 1000 mm wide, and provide entry door clear widths of at least 850 mm (short-side entry) or at least 1000 mm (long-side entry). The elevator does not need to be a full passenger elevator; a platform lift meeting CSA B355 is an acceptable barrier-free elevating device for buildings where a full elevator is not required. Where an escalator provides the only access to a floor, a parallel barrier-free path to the same floor must be provided and signage must direct people to it.

Accessible controls: the closed-fist rule

Controls for building services that are intended to be operated by occupants must comply with NBC 3.8.3.8. The closed-fist rule means: the control must activate with one hand in a fist, with no tight grasping, pinching, or wrist-twisting. Force must not exceed 22 N. Controls must be at 400 mm to 1200 mm above the floor and adjacent to a clear floor space of 1350 mm by 800 mm. Where a feedback signal exists, it must be both audible and visible. This applies to light switches, elevator call buttons, thermostat controls, door operators, and faucet controls throughout the barrier-free area.

Accessible signage: placement and format

Tactile signs at doors must be on the latch-side wall (or the nearest right-hand wall if no latch-side wall exists), centred at 1500 mm above the finished floor, with the edge of the sign no more than 300 mm from the door. Visual signs must comply with CSA B651 contrast and character-height requirements. All signs directing people to accessible facilities must incorporate the International Symbol of Access (wheelchair symbol) or the International Symbol of Access for Hearing Loss, as appropriate. Directional signs must be visual-only and must indicate routes to barrier-free entrances, washrooms, parking, and elevators.

Assistive listening systems: NBC 3.8.2.9

In assembly occupancies, all classrooms, auditoria, meeting rooms, and theatres over 100 sq m must be equipped with an assistive listening system complying with 3.8.3. At service counters in assembly occupancies where goods or services are provided to the public, at least one counter must have an assistive listening system or adaptive technology and, where a glass screen creates a barrier, an amplification system as well.

How each reference fits the Accessibility sub-categories

Three references serve Accessibility. Each plays a distinct role in ExAC preparation.

Key Accessibility terms (glossary)

Barrier-free

NBC Division A 1.4.1.2. Designed to allow persons with physical or sensory disabilities to approach, enter, and use a building or facility. A code-defined term in the NBC.

Barrier-free path of travel

A continuous route through a building, usable by a person with a mobility aid (including a wheelchair), from the barrier-free entrance to all areas required by 3.8.2 to be accessible.

Barrier-free storey

A storey to which a barrier-free path of travel is required under 3.8.2.3. Usually the entrance storey and all normally occupied floor areas above or below it.

Barrier-free entrance

An entrance to a building or storey that complies with 3.8.3, connected to the exterior barrier-free path. All pedestrian entrances to a barrier-free storey must be barrier-free under 3.8.2.2.

Universal washroom

A self-contained, single-occupancy washroom room complying with NBC 3.8.3.13. Required wherever washrooms are provided on a barrier-free storey. Includes turning circle, compliant water closet, lavatory, grab bars, and emergency-release lock.

Accessible stall

An enlarged water-closet stall within a multi-stall washroom, complying with NBC 3.8.3.12. Required where a washroom has more than two water closets or more than one water closet and one urinal.

Turning space (turning circle)

A clear floor space that allows a wheelchair to complete a 180-degree turn. NBC requires 1700 mm diameter circle, or 1700 mm by 1500 mm rectangle, or a T-shape. Required inside universal washrooms and at dead ends of paths over 12 m.

Lateral transfer space

The clear space beside a water closet that allows a wheelchair user to transfer from the chair to the toilet. Must be at least 1500 mm long from the back wall and 900 mm wide from the water closet edge. NBC 3.8.3.12.(1)(b).

L-shaped grab bar

A grab bar with horizontal and vertical components at least 760 mm long, mounted on the side wall closest to the water closet. Horizontal component at 750 to 850 mm above floor; vertical component 150 mm in front of the water closet. NBC 3.8.3.12.(1)(f).

Power door operator

An automatic or push-button device that opens and holds a door. Required at barrier-free entrances, along the path from entrances to suite doors, and at washrooms with accessible water closets. NBC 3.8.2.7.

Closed-fist operability

The NBC 3.8.3.8 standard for controls: operable with one hand in a fist, without tight grasping, pinching, or wrist-twisting. Applies to door hardware, elevator buttons, faucets, light switches, and thermostats throughout the barrier-free area.

CSA B651

Canadian Standard "Accessible Design for the Built Environment." An alternative compliance path to NBC 3.8.3. Table 3.8.3.1 maps each NBC article to its CSA B651 equivalent. Must be applied in its entirety for each design element, not selectively.

CSA B355

Canadian Standard "Platform Lifts and Stair Lifts for Barrier-Free Access." Referenced in NBC 3.8.3.7 as the required standard for passenger-elevating devices in barrier-free paths.

International Symbol of Access

The wheelchair symbol used on signs indicating barrier-free facilities. Required by NBC 3.8.3.9.(3) at signs for barrier-free entrances, washrooms, parking, elevators, and assistive listening systems.

Adaptable seat

A seat in an assembly occupancy that is designed to accommodate a person in a wheelchair if the standard seat is removed. NBC 3.8.2.3.(5) requires one per row in assemblies over 25 fixed seats served by two aisles, with at least 5 percent adjoining a barrier-free path.

Wheelchair space

A designated floor area in an assembly occupancy where a wheelchair user may remain in their chair, without a fixed seat. The count is set by Table 3.8.2.3.

Assistive listening system

A system (loop, FM, or infrared) that transmits sound to hearing aids or receivers. Required in assembly occupancy rooms over 100 sq m. NBC 3.8.2.9.

Exterior barrier-free path of travel

The route outside the building from a barrier-free parking area, passenger-loading zone, or public thoroughfare to the barrier-free entrance. Must comply with 3.8.3.3. Width minimum 1600 mm, slip-resistant, continuous surface.

Passenger-loading zone

An exterior area where vehicles drop off passengers. Where provided, must have an access aisle at least 1500 mm wide and 6000 mm long, adjacent and parallel to the vehicle pull-up space, with a clear height of 2750 mm. NBC 3.8.3.4.

How Accessibility questions are asked on the ExAC

Accessibility questions appear in most Section 2 sittings. The table below maps common question formats to each sub-category so you can recognize what is being asked.

Common ExAC traps in Accessibility questions

Six trap patterns show up regularly in Section 2 Accessibility questions. Recognize them before you answer.

1. Applying provincial standards instead of the NBC. Options that cite AODA requirements, BC Building Code amendments, or the Ontario Building Code as the answer are wrong unless the question specifically names a provincial standard. The ExAC tests the NBC national baseline.
2. Confusing the 1000 mm path width with the 850 mm door width. The minimum clear width of the path is 1000 mm. The minimum clear width of a door in the path is 850 mm. Both are in 3.8.3. Do not mix them.
3. Missing the escalator coordination rule. An escalator does not satisfy the barrier-free path requirement. Where an escalator provides floor access, a parallel barrier-free route must also be provided (3.8.2.4). Questions test whether you know a lift or elevator is still required.
4. Treating universal washrooms and accessible stalls as interchangeable. A universal washroom (3.8.3.13) and an accessible stall (3.8.3.12) are both required in different circumstances. The universal washroom does not replace the accessible stall requirement in the main washrooms.
5. Forgetting the 3.4 egress coordination for sub-category 5.12. Exit door hardware must comply with the closed-fist rule (3.8.3.8) and exits must be signed per 3.8.3.9. Treating egress and accessibility as unrelated is a trap: the study plan specifically cites Section 3.4 under 5.12.
6. Misreading the Table 3.8.2.3 formula. For the calculation questions, the formula for 100 to 499 seats is 3 plus 1 for every 70 seats above 100. Work through the arithmetic carefully: subtract 100 first, divide the remainder by 70, round up, then add 3.

Tips for Intern Architects studying Accessibility

• Memorize the key dimensions. Seven numbers cover most exam questions: 1000 mm path width, 850 mm door clear width, 1 in 12 ramp slope, 1700 mm turning circle, 460 to 480 mm water-closet centre-line distance, 430 to 460 mm water-closet seat height, and 1500 mm stall width. Write them on a card and test yourself.
• Read Section 3.8 straight through. The structure of 3.8.1 (scope), 3.8.2 (where it applies), and 3.8.3 (how to design it) is the framework for both sub-categories. Reading once straight through gives you the map before you drill into individual articles.
• Sketch the universal washroom from memory. Drawing the turning circle, the water closet position, the lateral transfer space, the grab bars, and the lavatory from memory forces you to recall the dimensions actively rather than passively. Do this three times before the exam.
• Practice the Table 3.8.2.3 calculation. Pick random seat counts in each row of the table and calculate the required wheelchair spaces. The formula structure changes at each bracket, so practise each one. A 350-seat hall, a 600-seat hall, and a 3000-seat arena are common question sizes.
• Trace the barrier-free path on a real plan. Find a plan drawing from your office or from Architectural Graphic Standards. Trace the path from the property line through the entrance, along the main corridor, into the elevator lobby, and to a washroom. Check whether each segment meets 3.8.3.
• Distinguish application (5.11) from understanding (5.12). Sub-category 5.11 gives you a design problem; 5.12 asks what the provision means or how it connects to other code sections. The question stem usually signals which sub-category is being tested by whether it asks you to calculate or apply (5.11) versus define or explain (5.12).
• Know the exemptions cold. Section 3.8 does not apply to detached and semi-detached houses, triplexes, townhouses, Group F Division 1 buildings, and buildings not in regular occupancy. Exam distractors often apply barrier-free requirements to these exempt building types.
• Use Architectural Graphic Standards for diagrams. The NBC does not have figures in the 3.8 articles. Architectural Graphic Standards gives you the dimensioned plans and sections that show what the code looks like in design. Reviewing these alongside the NBC text links the numbers to spatial reality.

How to study Accessibility in 10 to 14 hours

1. Hours 1 to 2: Read NBC Division A 1.4.1.2 (barrier-free definition), then read 3.8.1 and 3.8.2 straight through. Make a list of which building types and which areas are excluded from the barrier-free path requirement. This is the framework for both sub-categories.
2. Hours 3 to 5: Read 3.8.3 straight through. As you read, build a dimension reference table on paper: path width, door width, ramp slope, landing size, turning circle, water-closet position, grab bar heights, seat height, shower size. Look up any dimension the NBC cites in Architectural Graphic Standards to see it drawn.
3. Hour 6: Sketch the universal washroom plan from memory three times, checking each time against 3.8.3.13 and 3.8.3.14. Then sketch an accessible stall next to a standard stall to compare. Confirm the 1700 mm by 1700 mm clear floor space in front of the accessible stall door.
4. Hour 7: Work through Table 3.8.2.3 by calculating wheelchair spaces for five different seat counts (one in each bracket). Confirm your formula for the 100 to 499 bracket with a 250-seat and a 450-seat hall.
5. Hour 8: Read Section 3.4 with the goal of identifying where barrier-free egress coordination appears. Find the exit door hardware rule (3.8.3.8.(1)(b) referenced in Section 3.4) and the signage rules at exits. Note the Article 3.3.1.7 protection requirements for unsprinklered floor areas with a barrier-free path of travel, and the 3.8.2.3.(2)(g) triggers that extend the barrier-free path to a floor above or below the entrance level.
6. Hours 9 to 10: Read Architectural Graphic Standards, the Universal Design and Accessible Design sections, and Section 5 Part 1 of The Architect's Studio Companion. Confirm that the diagrams match the NBC dimensions. Flag any discrepancy as a provincial-code difference, not an NBC change.
7. Hours 11 to 14: Work through Examitect practice questions for sub-categories 5.11 and 5.12. After each wrong answer, go back to the exact NBC article and reread it. Keep a log of which provisions you misread and review those specifically in the final session.