Architectural Project 6		SHERIDAN COLLEGE
ARCH34231		Brampton

MODULE #5A- Summary of OBC Requirements

in respect to Assembly Occupancies

Learning Outcomes

"This module is intended to be nothing more than an introduction. Once you have schematic designs for your projects, you would be in a position to do a Building Code Matrix which will analyze your particular building. Nevertheless, to be forewarned to to be forearmed! This will highlight those parts of the code that might have an impact on your planning phase."

Contents

1. Issues related to Multiple Occupancies
2. Classification under 3.2.2.
3. Exit requirements for an assembly building

4. Standard OBC 2006 Matrix for Part 3

1. Issues related to Multiple Occupancies

Issue	Reference	Description
Classification	3.1.2. Table 3.1.2.1.	Every building or part of a build is to be classified according to its major occupancy as belonging to one of the Groups or Divisions described in Table 3.1.2.1. It is sometimes useful to refer to the appendices of the code for clarification on what the classification is a of a particular use.
Major Occupancy	Definitions in 1.4.1.2.	"principal occupancy for which a building or a part of a building is use and is deemed to include the subsidiary occupancies that are an integral part of the principal occupancy."
Separations between major occu-pancies	Table 3.1.3.1 3.2.8.	Activities not in the same classification often need to be fire separated from each other. The required ratings are provided in this table. These relate to walls and separating floors BUT certain floor openings as outlined in 3.2.8. are acceptable.
Fire Resistance Rating of floors separating two different superimposed Major occupancies.	3.2.2.7.	Superimposed Major Occupancies (except where one is less than 10% of the building area and NOT an F1 nor an F2 occupancy) the FRR (not the fire separation!) required for the floor of the higher occupancy would be based on the 3.2.2. requirements for the lower occupancy.

2. Building Classification under 3.2.2.

Issue	Reference	Description
Streets/ Fire Truck Access	3.2.2.10	For some classifications (usually combustible construction where not sprinklered) it is important to know from how many directions ("streets") the fire could be fought. Generally speaking a building is considered to face two streets where not less than 50% of the perimeter is within 15m of a street and three streets where 75% of the perimeter is within 15m of a street.
Streets/ Fire Truck Access	3.2.5.	The requirements for fire truck access, if not a public street right-of-way, are laid out in paragraphs 3.2.5.5. and 3.2.5.6. not less than 3m nor further than 15m from main entrance or any required access opening min. 6m wide; 5m clear height; 12 centreline radius at curves turn around facilities where the access route is more than 90 m long
Definition of "storey"	Definitions in 1.4.1.2. 3.2.1.1.(4)	Space between a floor and the top of the floor above....or if there is no storey above, the ceiling of the floor. A mezzanine level need not be considered a storey provided it meets certain criteria.
Definition of "building area"	Definitions in 1.4.1.2.	The greatest horizontal area of a building above grade.
Classification under 3.2.2. where multiple occupancies	3.2.2.4. 3.2.2.6. 3.2.2.7. 3.2.2.8.	Where there is more than one major occupancy the requirements for the most restricted major occupancy must be met. In a building where the aggregate of all major occupancies in a particular Group of Division is more than 10% of the floor area (except for the case of F1 and F2 occupancies).
Classification of Proposed Community Centre.

3. Exit Requirements for an Assembly Occupancy

The following table summarizes those sentences which determine the number and location of exits in an assembly occupancy building.

Issue	Reference	Description
Number of Exits	OBC 3.4.2.1.	More than one exit must be provided for any floor area exceeding 150m2 (1610 s.f.) if area NOT sprinklered or 200m2 (2150 s.f.) if sprinklered. Separate exits by a minimal distance of half the diagonal of the area of the fire compartment.
Distance to an exit	OBC 3.4.2.5.	If more than one exit is required from a floor area, the exits must be located so that at least one exit must be within 30m (98’-5")
Definition of an exit	OBC 1.4.1.2. OBC 3.4.4.4.	An exit may be something other than an exterior door. It can be a fire-separated corridor or stairway. If this is the case your permitted travel distance is to the point where you enter this fire-protected zone. Note that the integrity of such a fire-separated corridor must be maintained. It cannot be used as access to a service room, and storage rooms, washrooms, laundry rooms etc. cannot open directly into an exit enclosure (a vestibule would be required).
Exiting through a lobby	OBC 3.4.4.2.	ONE path of exit may be through a lobby provided that the lobby is not more than 4.5m (14’-9" above grade), the path through the lobby does not exceed 15m (49’-3"), industrial occupancies do not open off of the lobby (nor residential occupancies it the building is NOT sprinklered), the lobby, if double height does not include more than the main floor and the floor below, OR the main floor and the floor above.
Mezzanine Exiting	OBC 3.4.2.2.	One means of egress permissible, provided occupancy does not exceed 60 and area does not exceed 150m2 (1610 s.f.)
Direction of door Swing	OBC 3.4.6.11.	An exit door must swing in the direction of exit travel (i.e. outwards) where the occupant load it serves is greater than 60 persons.
Exit Width	OBC 3.4.3.4.	To determine whether you are providing adequate widths for exiting, take the occupant load and multiply it by 6.1mm (1/4") for doorways, ramps and corridors, or 9.2mm (3/8") for stairs.
Clear Heights of exits	OBC 3.4.3.5.	Every exit must have a headroom clearance of not less than 2100mm (6’-11"). Doors can be 2030 (6"-8").
Min. no. of risers	OBC 3.4.6.2.	No flight of interior stairs should have less than three risers.
Handrails	OBC 3.4.6.4.	Every exit stair or ramp requires at least one handrail, and where the width exceeds 1100mm (3’-7") handrails must be provided on both sides.
Exposure of exits to fire	OBC 3.2.3.13	Where a protected exit (ref. 3^rd reference) provides egress to the face of a building, the walls of adjacent fire compartment must be rated for a distance of 3m (9’-10") each direction.

4. Standard OBC 2006 Matrix for Part 3

The "matrix" shown below will be provided to you for your reference, and ultimately your use, on the Bulletin Board of this course. A second matrix which relates to Part 11 and is applicable only to work on existing buildings will be introduced in a later class, and also be provided.

The Building Departments of most municipalities will require a Building Code Matrix to be submitted along with the permit drawings when an application is being made for a building permit. This is to ensure that someone who has qualifications related to building code issues has ensured that the project meets the requirements of the current OBC.

Firm Name:

Certificate of Practice Number:

Enter address and

contact information here.

The Certificate of Practice Number

of the holder Is the holder’s BCDN.

Name of Project:

Enter name here.

Location:

Enter address here.

Apply seal and signature here.

The architect noted above has exercised responsible control with respect to design activities. The architect’s seal number is the architect’s BCDN.

Item

Ontario’s 2006 Building Code

OBC Reference

Data Matrix Part 3 or 9

References are to Division B unless noted

[A] for Division A or [C] for Division C.

Project Description:

1 Change of Use

1 New

1 Addition

1 Alteration

1 Part 11

1 Part 3

1 Part 9

11.1 to 11.4

1.1.2. [A]

1.1.2. [A] & 9.10.1.3.

Major Occupancy(s)

3.1.2.1.(1)

9.10.2.

Building Area (m²)

Existing ________

New ________

Total ________

1.4.1.2. [A]

Gross Area

Existing ________

New ________

Total ________

1.4.1.2. [A]

Number of Storeys

Above grade ____

Below grade _________

1.4.1.2. [A]&3.2.1.1.

1.4.1.2[A] & 9.10.4

Number of Streets/Fire Fighter Access ___________________________________

3.2.2.10. & 3.2.5.

9.10.20.

Building Classification ________________________________________________

3.2.2.20.-.83

9.10.2.

Sprinkler System Proposed

1 entire building

1 selected compartments

1 selected floor areas

1 basement 1 in lieu of roof rating

1 not required

3.2.2.20.-.83

3.2.1.5.

3.2.2.17.

INDEX

9.10.8.2.

INDEX

Standpipe required

1 Yes 1 No

3.2.9.

N/A

Fire Alarm required

1 Yes 1 No

3.2.4.

9.10.18.

Water Service/Supply is Adequate

1 Yes 1 No

3.2.5.7.

N/A

High Building

1 Yes 1 No

3.2.6.

N/A

Construction Restrictions

Actual Construction

1 Combustible permitted

1 Combustible

1 Non-combustible required

1 Non-combustible

1 Both

3.2.2.20.-.83

9.10.6.

Mezzanine(s) Area m² ________________________

3.2.1.1.(3)-(8)

9.10.4.1.

Occupant load based on

1 m²/person

1 design of building

3.1.17.

9.9.1.3.

Basement:

1^st Floor

2^nd Floor

3^rd Floor

Occupancy __________

Load ________ persons

( Additional floor areas continued below )

Barrier-free Design

1 Yes 1 No (Explain) ______________________

3.8.

9.5.2.

Hazardous Substances

1 Yes 1 No

3.3.1.2. & 3.3.1.19.

9.10.1.3.(4)

Required

Fire

Resistance

Rating

(FRR)

Horizontal Assemblies

FRR (Hours)

Listed Design No.

or Description (SG-2)

3.2.2.20.-.83 & 3.2.1.4.

9.10.8.

9.10.9.

Floors __________ Hours

Roof ___________ Hours

Mezzanine ______ Hours

FRR of Supporting

Members

Listed Design No. Or Description (SG-2)

Floors __________ Hours

Roof ___________ Hours

Mezzanine ______ Hours

Spatial Separation – Construction of Exterior Walls

3.2.3.

9.10.14.

Wall

Area of EBF (m²)

L.D. (m)

L/H or H/L

Permitted Max. % of Openings

Proposed % of Openings

FRR (Hours)

Listed Design or Description

Comb Const

Comb. Constr. Nonc. Cladding

Non-comb. Constr.

North

South

East

West

( Additional wall areas continued below )

Other – Describe ________________________________________________________________________________________

15 (Occupant Load - Continued)

_______Floor Occupancy ____________ Load______ persons

19 (Spatial Separation – Construction of Exterior Walls - Continued )

3.2.3.

9.10.14.

Wall

Area of EBF(m²)

L.D.

(m)

L/H

H/L

Permitted

Max. % of Openings

Proposed % of

Openings

FRR

(Hours)

Listed Design or Description

Comb

Const

Comb. Constr.

Nonc.

Cladding

Non-comb.

Constr.