OBC VOLUME 2 · APPENDIX A · NOTES TO PART 1Updated for the 2024 Ontario Building Code

Appendix A — Explanatory Notes to Part 1

Appendix A explanatory notes for Part 1 of Division B of the 2024 Ontario Building Code. These notes are advisory: they explain the intent behind code provisions and how to apply them.

A-1.1.1.1.(2)Factory-Constructed Buildings.

The Building Code applies the same requirements to site-built and factory-constructed buildings. However, it can often be difficult to determine whether a factory-constructed building complies with the Code once it has been delivered to the construction site because many of the wall, roof and floor assemblies are closed in and so their components cannot be inspected. CSA A277, “Procedure for certification of prefabricated buildings, modules, and panels,” was developed to address this problem with regard to residential, commercial and industrial buildings. This standard describes a procedure whereby an independent certification agency can review the quality control procedures of a factory and make periodic unannounced inspections of its products. The standard is not a building code, only a procedure for certifying compliance of factory-constructed components with a building code or other standard. If a factory-constructed building bears the label of an accredited certification agency indicating that compliance with the Building Code has been certified using the CSA A277 procedure, the accepting authority will have some assurance that the concealed components do not require re-inspection on site. On the other hand, standards in the CSA Z240 MH Series, “Manufactured homes,” do resemble a building code. Most of the individual standards in the series contain requirements regarding many issues also covered in the Building Code. Some of these Z240 MH Series provisions are performance requirements with no quantitative criteria, some simply reference the applicable Building Code requirements, while others contain requirements that differ from those in the Building Code. Because it would be illogical to have two different sets of requirements for buildings—one set that applies to site-built buildings and one set that applies to factory-constructed buildings—the Building Code does not reference these Z240 MH Series standards. One of the individual standards in the Z240 MH Series deals with special requirements for manufactured homes related to the fact that these houses must be moved over roads, which is an issue the Building Code does not address. Therefore, labeling that indicates that a factory-constructed house complies with the Z240 MH Series standards cannot be taken as an indication that the house necessarily complies with the building code in effect for the location where the house will be sited. The Building Code does reference CSA Z240.10.1, “Site preparation, foundation, and installation of buildings,” which is not actually part of the CSA Z240 MH Series. This standard contains requirements for surface foundations where buildings—not just houses—comply with the deformation resistance test provided in CSA Z240.2.1, “Structural requirements for manufactured homes.”

A-1.2.1.1.(1)(a)Compliance Via Acceptable Solutions.

If a building design (e.g. material, component, assembly or system) can be shown to meet all provisions of the applicable acceptable solutions in Division B (e.g. it complies with the applicable provisions of a referenced standard), it is deemed to have satisfied the objectives and functional statements linked to those provisions and thus to have complied with that part of the Code. In fact, if it can be determined that a design meets all the applicable acceptable solutions in Division B, there is no need to consult the objectives and functional statements in Division A to determine its compliance.

A-1.2.1.1.(1)(b)Compliance Via Alternative Solutions.

Where a design differs from the acceptable solutions in Division B, then it should be treated as an “alternative solution”. A proponent of an alternative solution must demonstrate that the alternative solution addresses the same issues as the applicable acceptable solutions in Division B and their attributed objectives and functional statements. However, because the objectives and functional statements are entirely qualitative, demonstrating compliance with them in isolation is not possible. Appendix A • Volume 2 Page 1 Therefore, Clause 1.2.1.1.(1)(b) identifies the principle that Division B establishes the quantitative performance targets that alternative solutions must meet. In many cases, these targets are not defined very precisely by the acceptable solutions - certainly far less precisely than would be the case with a true performance code, which would have quantitative performance targets and prescribed methods of performance measurement for all aspects of building performance. Nevertheless, Clause 1.2.1.1.(1)(b) makes it clear that an effort must be made to demonstrate that an alternative solution will perform as well as a design that would satisfy the applicable acceptable solutions in Division B - not “well enough” but “as well as”. In this sense, it is Division B that defines the boundaries between acceptable risks and the “unacceptable” risks referred to in the statements of the Code’s objectives, i.e. the risk remaining once the applicable acceptable solutions in Division B have been implemented represents the residual level of risk deemed to be acceptable by the broad base of Canadians who have taken part in the consensus process used to develop the Code. Level of Performance Where Division B offers a choice between several possible designs, it is likely that these designs may not all provide exactly the same level of performance. Among a number of possible designs satisfying acceptable solutions in Division B, the design providing the lowest level of performance should generally be considered to establish the minimum acceptable level of performance to be used in evaluating alternative solutions for compliance with the Code. Sometimes a single design will be used as an alternative solution to several sets of acceptable solutions in Division B. In this case, the level of performance required of the alternative solution should be at least equivalent to the overall level of performance established by all the applicable sets of acceptable solutions taken as a whole. Each provision in Division B has been analyzed to determine to what it applies and what it is intended to achieve. The resultant application and intent statements clarify what undesirable results each provision seeks to preclude. These statements are not a legal component of the Code, but are advisory in nature, and can help Code users establish performance targets for alternative solutions. Areas of Performance A subset of the acceptable solutions in Division B may establish criteria for particular types of designs (e.g. certain types of materials, components, assemblies, or systems). Often such subsets of acceptable solutions are all attributed to the same objective: Fire Safety, for example. In some cases, the designs that are normally used to satisfy this subset of acceptable solutions might also provide some benefits that could be related to some other objective: Fire Protection of the Building, for example. However, if none of the applicable acceptable solutions are linked to Objective OP1, Fire Protection of the Building, then alternative solutions proposed to replace these acceptable solutions are not required to provide a similar benefit related to Fire Protection of the Building. In other words, the acceptable solutions in Division B establish acceptable levels of performance for compliance with Division B only in those areas defined by the objectives and functional statements attributed to the acceptable solutions. Applicable Acceptable Solutions In demonstrating that an alternative solution will perform as well as a design that would satisfy the applicable acceptable solutions in Division B, its evaluation should not be limited to comparison with the acceptable solutions to which an alternative is proposed. It is possible that acceptable solutions elsewhere in the Code also apply. The proposed alternative solution may be shown to perform as well as the most apparent acceptable solution which it is replacing but may not perform as well as other relevant acceptable solutions. For example, an innovative sheathing material may perform adequately as sheathing in a wall system that is braced by other means but may not perform adequately as sheathing in a wall system where the sheathing must provide the structural bracing. All applicable acceptable solutions should be taken into consideration in demonstrating the compliance of an alternative solution. Relationship Between Division A and Division B Supplementary Standard SA-1 sets out the objectives and functional statements which have been attributed to the acceptable solutions provided in Division B of the Building Code. Page 2 Appendix A • Volume 2 “Acceptable solution” is defined in Article 1.4.1.2. of Division A. Objectives and functional statements have accordingly been attributed to each provision of Parts 2 to 12 of Division B that is considered to be a “requirement”; that is, a provision that provides criteria necessary to determine compliance with Division B. Requirements may specify performance values, qualities, quantities, design methods and test methods that are required in order to comply with Division B. Objectives and functional statements have not been attributed to provisions of Division B which are not considered to be “requirements”, but rather assist in the interpretation of requirements by fulfilling the following functions: • Introductions: specifies the scope and/or application of requirements (for example, Sentence 5.1.2.1.(1) of Division B, which specifies that application of Part 5); • Application modifiers: expand or limit the application of a requirement without changing its intent (for example, Sentence 9.35.2.1.(1) of Division B, which expands the application of the requirements for garages to a carport with more than 60% of its perimeter enclosed); • Exemptions: waive the application of a requirement (for example, Sentence 6.3.1.3.(6) of Division B, which exempts open-air storeys in a storage garage from the mechanical exhaust requirements of the remainder of Article 6.3.1.3.); • Signpost: provides direction to another requirement which would in any event be applicable (for example, Sentence 3.13.5.1. of Division B, which directs the Code user to the requirements of Subsection 3.2.4. for fire alarm and detection systems in rapid transit stations); • Classifications: categorize and sort requirements or aspects of requirements (for example, Sentence 8.1.2.1.(1) of Division B, which classifies the types of sewage systems) • Clarifications: explain the intent of a requirement (for example, Sentence 5.2.2.1.(2) of Division B, which identifies the structural loads referenced in the remainder of Article 5.2.2.1.); • Definitions: defining terms used in a requirement (for example, Sentence 7.1.1A.1.(2) of Division B, which defines “storey” for the purpose of Part 7); • Administrative provisions: specifies the use of, and determination of compliance with, requirements (for example, Sentence 9.7.4.3.(4) of Division B, which requires labelling of exterior wood doors to facilitate enforcement of the requirements of the remainder of Article 9.7.4.3.); Requirements of Division B will often be dependent on other provisions of Division B to which objectives and functional statements have not been attributed. For example, Sentence 3.2.4.1.(4) of Division B lists the conditions when a fire alarm system is required. Objective OS1.5 and functional statement F11 are attributed to this requirement. However, this Sentence must also be examined in the context of Sentences 3.2.4.1.(4.1) and (5), which are not characterized as requirements (and therefore have not been attributed objectives or functional statements) but are necessary to explain the context of that Sentence. In this instance, Sentences (4.1) and (5) list exceptions and modifications to Sentence (4). As a result, in evaluating the level of performance of an acceptable solution for the purposes of assessing an alternative solution, regard must be had both to requirements (to which objectives and functional statements have been attributed in this Standard) and to other provisions (to which objectives and functional statements have not been attributed in this Standard) related to the requirement.

A-1.3.3.Application of Division B.

The provisions in this Code are intended to establish minimum acceptable standards for public health and public safety, fire protection, structural sufficiency, conservation, environmental integrity, barrier-free use and access. It is intended that all installed features of a building, whether required or not, would be designed in conformance with good engineering practice and would meet the applicable requirements of the Code. Good design is necessary to ensure that the level of public safety Appendix A • Volume 2 Page 3 established by the Building Code requirements would not be reduced by a voluntary installation. Voluntary installations should not detrimentally affect other applicable provisions required by the Code. There is a public expectation that installed features in a building would meet their intended function and conform to the Building Code.

A-1.3.3.3C.Existing Buildings.

This Article describes the extent of renovation subject to the Building Code: only the areas or portions of a building being renovated, or other parts of a building adversely affected by that renovation need comply with the requirements of the Code; all other areas or portions need not comply with the Code and may remain unchanged.

A-1.3.3.4.(2)Buildings Divided by Firewalls.

This concept relates to the provisions directly regulated by this Code and does not apply to electrical service entrance and natural gas service requirements which are regulated by other documents.

A-1.4.1.2.(1)Defined Terms.

Adaptable Seating Adaptable seating enables persons in wheelchairs to transfer to a fixed seat without the obstruction of an armrest. Exit Exits include doors or doorways leading directly into an exit stair or directly to the outside. In the case of an exit leading to a separate building, exits also include vestibules, walkways, bridges and balconies. Farm Building Farm buildings as defined in Article 1.4.1.2. include but are not limited to produce storage and packing facilities, livestock and poultry housing, milking centres, manure storage facilities, grain bins, silos, feed preparation centres, farm workshops, greenhouses, farm retail centres, and horse riding, exercise and training facilities. Farm buildings may be classed as low or high human occupancy depending on the occupant load. Examples of farm buildings likely to be classed as low human occupancy as defined in Article 1.2.1.2. of the National Farm Building Code of Canada are livestock and poultry housing, manure and machinery storage facilities and horse exercise and training facilities where no bleachers or viewing area are provided. Examples of other buildings that would be classed as other than low human occupancy include farm retail centres for feeds, horticultural and livestock produce, auction barns and show areas where bleachers or other public facilities are provided. Farm work centres where the number of workers frequently exceeds the limit for low human occupancy will also be in this category. It is possible to have areas of both high and low human occupancy in the same building provided that the structural safety and fire separation requirements for high human occupancy are met in the part thus designated. Fire Separation A fire separation may or may not have a fire-resistance rating. Heritage Building This definition facilitates acknowledgement and acceptance of the significance of such a building through creditable means. Page 4 Appendix A • Volume 2 Plumbing System “Plumbing” is defined in the Building Code Act, 1992. Each of the three systems (drainage, venting, water) appearing in the definition are further defined in Article 1.4.1.2., with the end result that a plumbing system encompasses all three elements. Other piping systems as listed below are excluded from plumbing system since the definition of water system limits the system to the point of juncture with outlets, fixtures, etc. Similarly, a drainage system starts at the fixture or plumbing appliance it drains. A plumbing system does not include, (a) a system of piping, (i) for space heating in which water is used as a medium to transfer heat, (ii) in which liquids or vapours are circulated for the purpose of cooling or refrigeration, (iii) through which air is passed for the purpose of controlling the temperature, humidity or motion of air passing through the system, (iv) that conveys water for the purpose of providing water or nutrients to the soil, (v) that conveys water for the purpose of landscaping or for the care of animals, birds or fish, (vi) that transmits force by means of water or by means of a liquid other than water in which water is used for cooling, (vii) that conveys liquids for the purpose of melting ice or snow, or (viii) that uses water in the conveyance of flammable gas or fuel; or (b) a well, a well pump installed for the purpose of conveying water from a well, a pressure tank and pump if the tank and pump are combined as a unit, the piping between any well pump and the well, the piping between a well pump and a pressure tank that is installed separate from the pump and the connection of the piping to such pressure tank, and when there is no well pump, any piping connected to the well for a distance of three feet from the outside of the well. Public Corridor A covered mall is considered to be a public corridor and, as such, is subject to the same requirements as a public corridor. Public Heritage Building This definition addresses smaller heritage buildings that are to be made available to the public for viewing as examples of an architectural period or periods in the past, depicting how our forebears lived, worked or played, and what artifacts, objects or clothing were in use at that time. These buildings are not considered museums as such, and therefore would not be subject to the more stringent requirements of assembly occupancies for that use. Service Room Typical examples of service rooms include boiler rooms, furnace rooms, incinerator rooms, garbage handling rooms, and rooms to accommodate air-conditioning or heating appliances, pumps, compressors and electrical equipment. Rooms such as elevator machine rooms and common laundry rooms are not considered as service rooms. Suite Tenancy in the context of the term “suite” applies to both rental and ownership tenure. In a condominium arrangement, for example, dwelling units are considered separate suites even though they are individually owned. In order to be of complementary use, a series of rooms that constitute a suite are in reasonably close proximity to each other and have access to each other either directly by means of a common doorway or indirectly by a corridor, vestibule or other similar arrangement. Appendix A • Volume 2 Page 5 The term “suite” does not apply to rooms such as service rooms, common laundry rooms and common recreational rooms that are not leased or under a separate tenure in the context of the Code. Similarly, the term suite is not normally applied in the context of buildings such as schools and hospitals, since the entire building is under a single tenure. A rented room in a long-term care home could be considered as a suite if the room was under a separate tenure. A hospital bedroom on the other hand is not considered to be under a separate tenure, since the patient has little control of that space, even though he pays the hospital a per diem rate for the privilege of using the hospital facilities, which include the sleeping areas. For certain requirements in the Code, the expression “room or suite” is used (e.g. travel distance). This means that the requirement applies within the rooms of suites as well as to the suite itself and to rooms that may be located outside the suite. In other places the expression “suite, and rooms not located within a suite” is used (e.g. for the installation of smoke and heat detectors). This means that the requirement applies to individual suites as defined, but not to each room within the suite. The rooms “not within a suite” would include common laundry rooms, common recreational rooms and service rooms, that are not considered as tenant occupied space. a1 Secondary Suite A secondary suite is a self-contained dwelling unit that is part of a building containing not more than two dwelling units (including the secondary suite) and any common spaces such as common storage, common service rooms, common laundry facilities or common areas used for egress. Secondary suites are typically created within a new or existing single dwelling unit—commonly called a “house”—either constructed as an addition to an existing house or incorporated during the construction of a new house. A secondary suite may have more than one storey and may be on the same level as the otherl dwelling unit of the house or be above or below it. Examples of buildings where secondary suites are permitted include individual detached houses, or where the secondary suite is located in a portion of a building, semi-detached houses (half of a double) and freehold row houses. Where a building has multiple occupancies, the secondary suite can only be created in a portion of the building that is of residential occupancy. Apartment buildings have more than two dwelling units and are therefore not permitted to have secondary suites. Neither dwelling unit in a house can be strata-titled or otherwise subdivided from the remainder of the house under provincial or territorial legislation. This means that both dwelling units are registered under the same title. Secondary suites are also referred to as “accessory suites” or “secondary units”. e1 A-1.4.1.3. Applicable Law. Applicants for building permits are required to establish compliance with applicable law. The following table lists contact information for those agencies responsible for the statutory provisions defined in Sentence 1.4.1.3.(1): Applicable Law Provision Responsible Agency Contact City of Toronto Act, 2006: Subsection 102(3) of the City of Toronto Act, 2006 By-laws made under section 108 of the City of Toronto Act, 2006 but only with respect to the issuance of a General Inquiry: City of Toronto permit for the construction of a green roof. ph: 311 or 416-392-2489 Section 114 of the City of Toronto Act, 2006, with respect to the approval by the City of Toronto or the Ontario Land Tribunal of plans and drawings. Page 6 Appendix A • Volume 2 Applicable Law Provision Responsible Agency Contact Clean Water Act, 2006: Clause 59(1)(b) of the Clean Water Act, 2006 with Ministry of the Environment, General Inquiry: respect to the issuance of a notice by the risk Conservation and Parks ph: 416-325-4000 or 800-565-4923 management official for the construction of a building. Conservation Authorities Act: Clause 28(1)(c) under the Conservation Authorities Act, with respect to the permission of the authority for the Local Conservation Authority construction of a building if the control of flooding, erosion, dynamic beaches or pollution may be affected by the development. General Inquiry: ph: 416-212-7432 Central East Regional Office ph: 905-868-8900 Central West Regional Office ph: 905-567-7177 or 877-832-2818 Child Care and Early Years Act, 2014: Eastern Regional Office ph: 613-234-1188 or 800-267-5111 Section 14 of Regulation 137/15, under the Child Care Hamilton/Niagara Regional Office and Early Years Act, 2014, with respect to the approval Ministry of Children, ph: 905-521-7280 of plans for a new building to be erected or an existing Community and Social North East Regional Office building to be used, altered or renovated for use as a Services ph: 705-474-3540 or 800-461-6977 child care centre or for alterations or renovations to be Northern Regional Office made to premises used by a child care centre. ph: 705-564-6699 or 800-265-1222 South East Regional Office ph: 613-545-0539 or 800-646-3209 South West Regional Office ph: 519-438-5111 or 800-265-4197 Toronto Regional Office ph: 416-325-0500 Development Charges Act, 1997: Sections 28 and 53 under the Development Charges Act, Local Municipality 1997. Education Act: General Inquiry Education Act, Section 194, with respect to the approval Ministry of Education ph: 416-325-2929 or 800-387-5514 of the Minister for the demolition of a building. Education Act: Local Municipality Sections 257.83 and 257.93 under the Education Act. Elderly Persons Centres Act: Section 6 of Regulation 314, of the Elderly Persons Ministry of Health and General Inquiry: Centres Act, with respect to the approval of the Minister Long-Term Care ph: 416-327-4327 or 800-268-1153 for the construction of a building project. Appendix A • Volume 2 Page 7 Applicable Law Provision Responsible Agency Contact Environmental Assessment Act: Section 5 of the Environmental Assessment Act, with General Inquiry: Ministry of the Environment, ph: 416-325-4000 or 800-565-4923 respect to the approval of the Ministry or the Ontario Environmental Approvals Branch Conservation and Parks Land Tribunal to proceed with an undertaking. ph: 416-314-8001 or 800-461-6290 Subsection 5(4) of the Environmental Assessment Act Environmental Protection Act: Section 46 of the Environmental Protection Act with respect to the approval of the Minister to use land or land General Inquiry: covered by water that has been used for the disposal of ph: 416-325-4000 or 800-565-4923 waste. Central Region ph: 416-326-6700 or 800-810-8048 Section 47.3 of the Environmental Protection Act, with Eastern Region respect to the issuance of a renewable energy approval. Ministry of the Environment, ph: 613-549-4000 or 800-267-0974 Northern Region Section 168.3.1 of the Environmental Protection Act, with Conservation and Parks ph: 807-475-1205 or 800-875-7772 respect to the construction of a building to be used in Southwestern Region connection with a change of use of a property. ph: 519-873-5000 or 800-265-7672 Paragraph 2 of Subsection 168.6(1) of the Environmental West Central Region Protection Act, if a certificate of property use has been ph: 905-521-7640 or 800-668-4557 issued in respect of the property under subsection 168.6(1) of the Act. Milk Act Section 14 of the Milk Act, with respect to the permit from Ministry of Agriculture, Food General Inquiry the Director for the construction or alteration of any and Rural Affairs ph: 519-826-3100 or 888-466-2372 building intended for use as a plant. Municipal Act, 2001 Local Municipality Subsection 133(4) of the Municipal Act, 2001. Niagara Escarpment Planning and Development Act: General Inquiry Ministry of Natural Resources ph: 800-667-1940 Subsection 24(3) of the Niagara Escarpment Planning and Forestry Niagara Escarpment Commission and Development Act. ph: 905-877-5191 Nutrient Management Act, 2002: Section 11.1 of O. Reg. 267/03 of the Nutrient Management Act, 2002, with respect to a proposed General Inquiry Ministry of Agriculture, Food ph: 519-826-3100 or 888-466-2372 building or structure to house farm animals or store and Rural Affairs nutrients if that Regulation requires the preparation and approval of a nutrient management strategy before construction of the proposed building or structure. Page 8 Appendix A • Volume 2 Applicable Law Provision Responsible Agency Contact Ontario Heritage Act: Subsection 27(9) of the Ontario Heritage Act, with respect to a notice to the council of a municipality to the demolition or removal of a building from a registered property. Subsection 30(2) of the Ontario Heritage Act, with respect to a consent of the council of a municipality to the alteration or demolition of a building. Section 33 of the Ontario Heritage Act, with respect to the consent of the council of a municipality for the Local Municipality alteration of a property. Section 34 of the Ontario Heritage Act, with respect to the consent of the council of a municipality for the demolition of a building. By-laws made under Section 40.1 of the Ontario Heritage Act Section 42 of the Ontario Heritage Act, with respect to the permit given by the council of a municipality for the erection, alteration, or demolition of a building. Ontario Heritage Act: Section 34.5 of the Ontario Heritage Act, with respect to a consent of the Minister to the alteration or demolition of Ministry of Tourism, General Inquiry: a designated building ph: 416-326-9326 Culture and Sport Subsection 34.7(2) of the Ontario Heritage Act, with respect to a consent of the Minister to the alteration or demolition of a designated building General Inquiry: ph: 416-585-7041 Ontario Planning and Development Act, 1994, Central Municipal Services Office Section 14 Ontario Planning and Development Act, 1994, ph: 416-585-6226 or 800-668-0230 with respect to any conflict between a development plan Eastern Municipal Services Office Ministry of Municipal Affairs ph: 613-545-2100 or 800-267-9438 made under that Act and a zoning by-law that affects the Northeastern Municipal Services Office and Housing proposed building or structure. ph: 705-564-0120 or 800-461-1193 Subsection 17(1) Ontario Planning and Development Northwestern Municipal Services Office Act, 1994 with respect to orders made under that Act. ph: 807-475-1651 or 800-465-5027 Southwestern Municipal Services Office ph: 519-873-4020 or 800-265-4736 Appendix A • Volume 2 Page 9 Applicable Law Provision Responsible Agency Contact Planning Act: Section 33 of the Planning Act, except where in the case of demolition of a residential property, a permit to demolish the property is obtained under that Section By-laws made under Sections 34 or 38 of the Planning Act. Section 41 of the Planning Act, with respect to the approval by the council of the municipality of the Municipal Board of plans and drawings. Local Municipality Section 42 of the Planning Act, with respect to the payment of money to the Municipality. Section 46 of the Planning Act. By-laws made under O. Reg. 608/06 (Development Permits) made under the Planning Act. By-laws made under O. Reg. 246/01 (Development Permits) made under the Planning Act. General Inquiry: ph: 416-585-7041 Central Municipal Services Office ph: 416-585-6226 or 800-668-0230 Planning Act: Eastern Municipal Services Office Ministry of Municipal Affairs ph: 613-545-2100 or 800-267-9438 Section 47 of the Planning Act, with respect to orders and Housing Northeastern Municipal Services Office made under that Act. ph: 705-564-0120 or 800-461-1193 Northwestern Municipal Services Office ph: 807-475-1651 or 800-465-5027 Southwestern Municipal Services Office ph: 519-873-4020 or 800-265-4736 Public Lands Act: Section 2 of O. Reg. 453/96 of the Public Lands Act, Ministry of Natural Resources General Inquiry with respect to the work permit from the Minister and Forestry ph: 800-667-1940 authorizing the construction or placement of a building on public land. General Inquiry ph: 800-268-4686 Central Region: Public Transportation and Highway Improvement Act: ph: 416-235-5412 Eastern Region: Section 34 or 38 of the Public Transportation and ph: 800-267-0295 Highway Improvement Act, with respect to the permit Ministry of Transportation Northeastern Region: from the Minister for the placement, erection or alteration ph: 705-472-7900 or 800-461-9547 of any building or other structure or the use of land. Northwestern Region: ph: 807-473-2000 or 800-465-5034 Southwestern Region: ph: 519-873-4335 or 800-265-6072 Page 10 Appendix A • Volume 2

A-1.5.1.1.(1)Application of Referenced Documents.

Documents referenced in the Building Code may contain provisions covering a wide range of issues, including issues that are unrelated to the objectives and functional statements stated in Parts 2 and 3 of Division A respectively; e.g. aesthetic issues such as colour-fastness or uniformity. Sentence 1.5.1.1.(1) is intended to make it clear that, whereas referencing a document in the Building Code generally has the effect of making the provisions of that document part of the Code, provisions that are unrelated to buildings or to the objectives and functional statements attributed to the provisions in Division B where the document is referenced are excluded. Furthermore, many documents referenced in the Building Code contain references to other documents, which may also, in turn, refer to other documents. These secondary and tertiary referenced documents may contain provisions that are unrelated to buildings or to the objectives and functional statements of the Building Code: such provisions - no matter how far down the chain of references they occur - are not included in the intent of Sentence 1.5.1.1.(1) of Division A.

A-1.1.2.1.(2)Winter Design Temperatures.

The 2.5 percent values referenced in Sentence 1.1.2.1.(2) are the least restrictive temperatures that can be used. If a designer chooses to use the 1 percent values shown in MMAH Supplementary Standard SB-1, they would be in excess of the Code minimums and would be considered acceptable.

A-1.3.2.1.Abbreviations of Proper Names.

The following table provides contact information for organizations referenced in this Code: Name Address Contact American Conference of Governmental Industrial Hygienists ph: 513-742-2020 ACGIH 1330 Kemper Meadow Drive fax: 513-742-3355 Cincinnati, Ohio 45240 USA web site: www.acgih.org American Iron and Steel Institute ph: 202-452-7100 AISI 25 Massachusetts Ave., NW Suite 800 fax: 202-452-1039 Washington, DC 20001 USA web site: www.steel.org American National Standards Institute ph: 212-642-4900 ANSI 25 West 43rd Street, 4th Floor fax: 212-398-0023 New York, New York 10036 USA web site: www.ansi.org The Engineered Wood Association ph: (253) 620-7400 7011 S. 19th Street fax: (253) 565-7265 APA Tacoma, WA 98466-5333 USA web site: www.apawood.org American Public Health Association ph: 202-777-2742 APHA 800 I Street, NW fax: 202-777-2534 Washington, DC 20001 USA web site: www.apha.org American Society of Civil Engineers ph: 800-584-2723 ASCE 1801 Alexander Bell Drive web site: www.asce.org Reston, VA 20191 USA American Society of Heating, Refrigerating and Air-Conditioning ph: 404-636-8400 Engineers 800-527-4723 ASHRAE 1791 Tullie Circle, N.E. fax: 404-321-5478 Atlanta, Georgia 30329 USA web site: www.ashrae.org The American Society of Mechanical Engineers ph: 800-843-2763 ASME Three Park Avenue fax: 973-882-1717 New York, New York 10016-5990 USA web site: www.asme.org American Society of Plumbing Engineers ph: 847-296-0002 ASPE 6400 Shafer Court, Suite 350 fax: 847-296-2963 Rosemont, Illinois 60018 USA web site: www.aspe.org American Society of Sanitary Engineering ph: 440-835-3040 ASSE 901 Canterbury Suite A fax: 440-835-3488 Westlake, Ohio 44145 USA web site: www.asse-plumbing.org American Society for Testing and Materials ph: 610-832-9585 100 Barr Harbor Drive ASTM fax: 610-832-9555 PO Box C700 web site: www.astm.org West Conshohocken, Pennsylvania 19428-2959 USA Page 12 Appendix A • Volume 2 Name Address Contact American Welding Society ph: 800-443-9353 AWS 8669 NW 36th Street, Suite 130 fax: 305- 443-5647 Doral, Florida 33166 USA web site: www.aws.org ph: 303-794-7711; American Water Works Association 800-926-7337 AWWA 6666 W. Quincy Ave. fax: 303-347-0804 Denver, Colorado 80235 USA web site: www.awwa.org British Columbia Ministry of Health ph: (250) 952-1469 Population Health and Wellness, Health Protection BCMOHS fax: (250) 952-1713 1515 Blanshard Street, 4th Floor web site: http://www.health.gov.bc.ca Victoria, British Columbia V8W 3C8 ph: 418-652-2238 Bureau de Normalisation du Québec 800-386-5114 BNQ 333, rue Franquet fax: 418-652-2292 Québec, Québec G1P 4C7 web site: www.bnq.qc.ca Canadian Commission on Building and Fire Codes National Research Council Canada ph: 613-993-9960 CCBFC Building M-23A fax: 613-952-4040 1200 Montreal Road web site: www.nationalcodes.ca Ottawa, Ontario K1A 0R6 ph: 819-956-0425 Canadian General Standards Board 800-665-2472 CGSB 11 Laurier Street fax: 819-956-5740 Gatineau, Quebec K1A 1G6 web site: www.pwgsc.gc.ca/cgsb ph: 416-747-4044 Canadian Standards Association 800-463-6727 CSA 5060 Spectrum Way, Suite 100 fax: 416-747-2510 Mississauga, Ontario L4W 5N6 web site: www.csa.ca ph: 613-747-5544 Canadian Wood Council 800-463-5091 CWC 99 Bank Street, Suite 400 fax: 613-747-6264 Ottawa, Ontario K1P 6B9 web site: www.cwc.ca Institute for Research in Construction National Research Council Canada Building M-23A ph: 613-993-9960 DBR 1200 Montreal Road fax: 613-952-4040 Ottawa, Ontario K1A 0R6 web site: www.nationalcodes.ca The Division of Building Research (DBR) is now known as the Institute for Research in Construction. Environmental Protection Agency ph: (202) 272-0167 EPA Ariel Rios Building web site: www.epa.gov 1200 Pennsylvania Avenue, N.W. Washington, DC 20460 USA FINA World Aquatics ph: (+41-21) 310-47-10 (now World Chemin de Bellevue 24a/24b web site: www.worldaquatics.com Aquatics) CH-1005 Lausanne, Switzerland Green Roofs for Healthy Cities ph. 416-971-4494 GRHC 406 King Street East web site: www.greenroofs.org Toronto, Ontario M5A 1L4 Appendix A • Volume 2 Page 13 Name Address Contact Health Canada ph: 866-225-0709 HC Address Locator 0900C2 fax: 613-941-5366 Ottawa, Ontario K1A 0K9 web site: www.hc-sc.gc.ca Hydronics Institute Division of GAMA ph: 866-408-3831 35 Russo Place 908-464-8200 HI P.O. Box 218 fax: 908-464-7818 Berkeley Heights, New Jersey 07922 USA web site: www.gamanet.org The Hydronics Institute was formally merged into GAMA in 2004. Hardwood Plywood & Veneer Association ph: 703-435-2900 (Now Decorative Hardwoods Association) HPVA fax: 703-435-2573 42777 Trade West Dr web site: decorativehardwoods.org Sterling, VA 20166 USA Heating, Refrigerating and Air-Conditioning Institute of Canada ph: 905-602-4700 2800 Skymark Avenue 800-267-2231 HRAI Building 1, Suite 201 fax: 905-602-1197 Mississauga, Ontario L4W 5A6 web site: www.hrai.ca Home Ventilating Institute ph: 847-526-2010 HVI 1000 N. Rand Rd. Suite 214 fax: 847-526-3993 Wauconda, Illinois 60084 USA web site: www.hvi.org International Association of Plumbing and Mechanical Officials ph: 909-472-4100 IAPMO 4755 E. Philadelphia St. fax: 909-472-4150 Ontario, California 91761 USA web site: iampo.org Illuminating Engineering Society of North America ph: 212-248-5000 IESNA 120 Wall Street, Floor 17 fax: 212-248-5017 New York, New York 10005-4001 USA web site: www.iesna.org International Organization for Standardization ISO Central Secretariat ph: 41-22-749-01-11 ISO 1, ch. de la Voie-Creuse fax: 41-22-733-34-30 CP 56 web site: www.iso.org CH-1211 Geneva 20, Switzerland U.S. Department of Housing and Urban Development HUD established HUD USER as the primary source of US ph: 202-708-3178 government technical housing publications. 800-245-2691 HUD HUD USER fax: 202-708-9981 P.O. Box 23268 web site: www.huduser.org Washington, DC 20026-3268 USA Ontario Ministry of the Environment ph: 416-325-4000 MOE (Ontario Ministry of the Environment, Conservation and Parks) fax: 416-314-6713 (now MECP) 135 St Clair Avenue West web site: www.ontario.ca/ministry- Toronto, Ontario M4V 1P5 environment-conservation-parks National Fire Protection Association 617-770-3000 NFPA 1 Batterymarch Park fax: 617-770-0700 Quincy, Massachusetts 02169-7471 USA web site: www.nfpa.org National Fenestration Rating Council ph: 301-589-1776 NFRC 6305 Ivy Lane, Suite 140 fax: 301-589-3884 Greenbelt, MD 20770, USA web site: www.nfrc.org Page 14 Appendix A • Volume 2 Name Address Contact National Lumber Grades Authority ph: 604-524-2393 NLGA #302 -960 Quayside Drive, fax: 604-524-2893 New Westminster, British Columbia V3M 6G2 web site: www.nlga.org Natural Resources Canada ph: 613-995-2943 NRCan Office of Energy Efficiency 800-387-2000 580 Booth St., 18th Floor web site: www.nrcan-rncan.gc.ca Ottawa, Ontario K1A 0E4 NSF International ph: 734-769-8010 NSF P.O. Box 130140 fax: 734-769-0109 789 N. Dixboro Road web site: www.nsf.org Ann Arbor, Michigan 48113-0140 USA SEI See ASCE Sheet Metal and Air Conditioning Contractors National Association ph: 703-803-2980 SMACNA Inc. fax: 703-803-3732 4201 Lafayette Center Drive web site: www.smacna.org Chantilly, Virginia 20151-1219 USA Single Ply Roofing Industry ph: 781-647-7026 SPRI 465 Waverley Oaks Road fax: 781-647-7222 Suite 421 web site: www.spri.org Waltham, MA 02452 ph: 613-990-2309 Transport Canada 866-995-9737 TC 330 Sparks Street fax: 613-954-4731 Ottawa, Ontario K1A 0N5 web site: www.tc.gc.ca Truss Plate Institute of Canada c/o Jager Metal Products, #220 6223 2nd Street East, Calgary, Alberta T2H 1J5 TPIC web site: www.tpic.ca The TPIC, “Truss Design Procedures and Specifications for Light Metal Plate Connected Wood Trusses” is available on-line at: the TPIC web site at: www.tpic.ca. Underwriters Laboratories Inc. ph: 847-272-8800 UL 333 Pfingsten Road web site: www.ul.com Northbrook, Illinois 60062-2096 USA Underwriters' Laboratories of Canada ph: 866-937-3852 ULC 7 Underwriters Road fax: 416-757-8727 Toronto, Ontario M1R 3A9 web site: www.ulc.ca United States Department of Agriculture USDA 1400 Independence Ave., S.W. web site: www.usda.gov Washington, DC 20250 USA Water Environment Federation ph: 800-666-0206 WEF 601 Wythe Street fax: 703-684-2492 Alexandria, Virginia 22314-1994 USA web site: www.wef.org Waterfront Toronto ph: 416-214-1344 WT 20 Bay Street, Suite 1310 fax: 416-244-4591 Toronto, Ontario M5J 2N8 web site: info@waterfrontoronto.ca Appendix A • Volume 2 Page 15

A-1.2.1.1.Design by Architect or Professional Engineer.

The practice of architecture is regulated by the Architects Act. The practice of professional engineering is regulated by the Professional Engineers Act. Professional design requirements related to the design of buildings are regulated by the Professional Engineers Act and the Architects Act. Certain foundations, sprinkler protected glazed wall assemblies, shelf and rack storage systems, tent framing and sign structures are required to be designed by a suitably qualified and experienced person. Refer to Article 1.2.2.1. for general review by an Architect or a Professional Engineer of these assemblies and systems. Refer to the “Use of the Professional Engineer’s Seal” published by Professional Engineers Ontario for guidance on the proper use of a Professional Engineer’s seal.

A-1.2.2.1.General Review by Architect or Professional Engineer.

In addition to the general review of the construction of buildings described in Table 1.2.2.1. by an Architect or Professional Engineer, Sentences 1.2.2.1.(4) to (10) require general review by an Architect or a Professional Engineer of certain foundations, sprinkler protected glazed wall assemblies, shelf and rack storage systems, tent framing and sign structures. These assemblies and systems are required to be designed by a suitably qualified and experienced person, as detailed in Article 1.2.2.1.

This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.

A-1.3.6.1.As Constructed Plans.

The intent of the provision for as constructed plans is to provide the municipality with authority to ask for information that is necessary for the enforcement of the Act and the Building Code. The intent of the provision is not to duplicate the permit approval process and require similar information to be filed upon completion of the project. Similarly, the provision is not intended to require information and documentation beyond those that are normally generated in the building permit approval process.

Understand any provision in seconds

BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.

Try BUILDAiD Beta

Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.