B-1.1, r. 2 - Construction Code

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1.09. The amendments to the Code are as follows:
O.C. 293-2008, s. 1; O.C. 939-2009, s. 3; O.C. 858-2012, s. 7; O.C. 347-2015, s. 1; I.N. 2015-07-01.
1.09. The Code is amended in Division B of Volume 2
(1)  by inserting reference “NFPA 92A-2006, Recommended Practice for Smoke-Control Systems, B-3.2.6.2.(3)” after reference NFPA 91-1999, Exhaust Systems for Air Conveying of Vapors, Gases, Mists and Noncombustible Particulate Solids A-6.2.2.5(1)” in the list of documents in Table A-1.3.1.2.(1);
(1.1)  by inserting “ASHRAE 140-2007 Test for the Evaluation of Building Energy Analysis Computer Programs A-11.2.2.1.(3)” after “ASHRAE 62.1-2004 Ventilation for Acceptable Indoor Air Quality A-29.25.1.2.” in the list of documents in Table A-1.3.1.2.(1);
(1.2)  by inserting “CAN/CGSB-149.10-M86 Determination of the Airtightness of Building Envelopes by the Fan Depressurization Method A-11.2.1.2.(6)” after “CAN/CGSB-93.2-M91 Prefinished Aluminum Siding, Soffits and Fascia, for Residential Use” in the list of documents in Table A-1.3.1.2.(1);
(2)  in Note A-3.1.2.1.(1)
(a) by inserting “Rehabilitation centres” after “Reformatories without detention quarters” in Group B, Division 2;
(b) by inserting “Residential board and care occupancy” after “Rehabilitation centres” in Group B, Division 2;
(c) by inserting “Rooming houses” after “Motels” in Group C;
(d) by inserting “Outfitting operations” after “Motels” and “Shelters” after “Schools, residential” in Group C;
(3)  by striking out note A-3.2.4.18.(4);
(4)  by inserting the following after note A-3.2.5.14.(1):
“A-3.2.5.15.(1) Protected Service Spaces. A permanent floor in a service space if need be may be used to store maintenance products and supplies, without frequent monitoring of the combustible content accumulated in the service space. Because access to the spaces is difficult for firefighting, the spaces must be protected by a sprinkler system. When the floor is only a walkway, the risk of significant accumulation of combustible content is considerably reduced, and this requirement no longer applies.”;
(5)  by adding the following after note A-3.4.1.6.(2):
“A-3.4.2.1.(2) Minimum Number of Exits. When the only exit is separated and leads to the outside at a level other than the level it serves, no other access door shall be installed at that exit at a storey other than the storey served. This requirement is necessary to reduce the risk of smoke filling the only exit serving the floor area or parts of floor areas having access to that only exit. (See Figure A-3.4.2.1.(2).);
Figure A-3.4.2.1.(2)

(6)  by adding the following at the end of note A-3.8.1.2.:
“Service entrances such as those for delivery and receipt of goods, and those accessing Group F service rooms and workshops, need not be made accessible.”;
(7)  by striking out note A-3.8.2.2.;
(8)  by inserting the following after note A-3.8.1.4.(1):
“A-3.8.3.1.(5) Sign for Barrier-Free Parking. Sign P-150-5 is represented in Schedule 1 to the Regulation respecting road signs (chapter C-24.2, r. 41). (See Figure A-3.8.3.1.(5)).
Figure A-3.8.3.1. 5)
(9)  by striking out note A-3.8.3.3.(2);
(10)  by adding the following at the end of note A-3.8.3.3.(5):
“The electrical opening mechanism must prevent the closing of the door when a ­person is in the swing area. Mechanisms conforming to ANSI 156.10 include a device for stopping the door from closing to ensure the safety of users and reduce the risk of injury.”;
(11)  by inserting the following after note A-4.2.5.1.(1):
“A-4.2.5.1.(2) Backfilling. Certain granular material may swell under chemical reactions involving certain minerals constituting the granular material. A number of reactions involve iron sulphide (pyrite, pyrrhotite, etc.) and carbonates present, cristallizing the sulfates and the subsequent increase of volumes of the granular backfilling. The reactions are influenced by a number of factors, including the presence of clay mineral, that facilitate water absorption and oxidation of iron sulphides, particle-size distribution, water content of materials, the presence of bacteria and temperature.
The most prevalent characterization method of granular materials, the petrographic index for potential swelling, may be accepted to meet the requirement.
The method is described in the following documents:
— NQ 2560-500 Granulats - Détermination de l’indice pétrographique du potentiel de gonflement sulfatique des matériaux granulaires - méthode d’essai pour l’évaluation de l’IPPG,
— NQ 2560-510 Granulats - Guide d’application de la méthode d’essai pour la caractérisation du potentiel de gonflement sulfatique des matériaux granulaires.
The non-swelling rock accepted under the two standards is commonly called “DB certified rock” (DB for “dalle de béton).
Other methods, such as the chemically or biologically accelerated swelling test, may determine swelling but are less used because of the time required for the test.
Other granular materials from industrial processes, such as blast furnace slag, may also swell under certain conditions. Verifications are recommended before using granular materials in works sensitive to volumetric changes.”;
(11.1)  by inserting the following after Note A-6.2.2.7.(1):
“A-6.2.2.8.(7)(c)(iii) Heat Recovery Ventilation. For the purposes of Part 11, sensible heat recovery efficiency from the heat recovery ventilation (HRV) must be determined with a flow rate equal to or greater than the expected flow rate for the normal operation at low speed of the HRV.”;
(12)  by replacing note A-9.7.1.5. by the following:
“A-9.7.1.5. Height of Window Sills Above Floors or Ground. This requirement is primarily designed to reduce the possibility of young children falling from a window. The requirement applies to dwelling units with mostly swinging or sliding windows. The choice of windows must therefore be made carefully because, even when equipped with special hardware, certain ajar windows may open wider with a simple push.
Swinging windows with rotating opening mechanisms are considered to be in conformance with Clause 9.7.1.5.(1)(b). To ensure the safety of older children, parents may easily remove the crank handles from the windows. The scissor opening mechanisms of awning windows, however, do not prevent these windows from being opened wide once unlocked. Sash windows are not considered safe if both sashes are mobile, because they provide openings at the top and bottom. This requirement prevents the use of sliding windows that do not have a device for limiting the opening.
The maximum opening of a window, 100 mm, and the maximum drop on the other side of a window to the ground, 600 mm, were determined according to the same principles that were applied for guards.”;
(13)  (paragraph revoked);
(14)  by inserting the following after note A-9.12.3.3.(1):
“A-9.13.2.1.(3) Required Dampproof Protection. The use of a protection membrane on the ground under floors protects against humidity, protects concrete against sulfate attack from the ground or subjacent granular materials and protects the occupants against the effects of soil gases such as radon.
Certain granular materials, including hornfels, may produce a significant quantity of sulfates likely to migrate by capillarity towards the underside of floors on ground and cause sulfatization of concrete. The following methods are recommended to protect concrete against sulphate-laden humidity:
(a) the use of sulfate resistant concrete (Article 9.3.1.3.),
(b) the use of a vapour barrier (Article 9.13.4.2.),
(c) the use of clean coarse aggregates limiting capillarity effects and preventing migration of sulfates (Article 9.16.2.1.).”;
(15)  by inserting the following after note A-9.13.4.:
“A-9.13.4.1.(1) Locations Likely to Constitute A Soil Gas Emanations Hazard. A location may constitute a soil gas emanations hazard when it is situated in a zone identified by an authority having jurisdiction in a directive or report as a zone having soil that may emit soil gas emanations likely to exceed the level of harm prescribed by Health Canada. For example, in 1998, the Oka region was formally identified by the public health department as a zone having potential for emanations exceeding the prescribed level of harm.”;
(16)  by inserting the following after note A-9.15.3.4.(2):
“A-9.16.2.2.(1) Support of Floors. In a granular mixture, the fine portion of aggregates is generally composed, because of the manufacturing process, of more friable minerals that are more susceptible to fragmentation, alteration and swelling. Aggregates containing mostly fine materials are also more susceptible to swelling given the small intergranular space available for the formation of secondary minerals. A large quantity of fine material promotes the diffusion of humidity by capillarity (see A-9.13.2.1.(3)). It is preferable to limit the quantity of fine materials.”;
(17)  by striking out “This device would be acceptable in conjunction with a system designed in accordance with Article 9.32.3.6.” in note A-9.32.3.3.(3)(d);
(18)  by striking out note A-9.32.3.6.;
(19)  by adding the following after Note A-9.34.2.:
“A-10.2.2.2.(3) Major or Minor Alteration. The concepts of major or minor alteration are used for retrofitting. The term “retrofitting” means all the alteration work carried out in view of a different occupancy of the altered part. Alteration types, such as addition, change of major occupancy, alteration of the envelope or exterior elements, increase in occupant load, construction of or modification to a mezzanine or interconnected floor space, or the addition or modification of a vertical transportation facility are not governed by this type of alteration since they are already governed by other requirements of Part 10.
A-10.3.4.1.(1)(a) Capacity of Exits Serving an Altered Part. Even if the exits must have a minimum width of 760 mm, the exits must comply, for the altered part they serve, with the minimum capacity prescribed by Article 3.4.3.2., calculated according to the occupant load under Subsection 3.1.17. of this Code.
If the calculation of the capacity results in the exits having a width larger than 760 mm, they should be modified or another exit should be added.
This provision refers to an alteration, other than a minor alteration, that does not include an exit.
A.11.2.1.1.(1) Exemptions. Buildings that are not intended to be heated are exempt from the energy efficiency requirements. This could apply to storage and parking garages as well as small service buildings or service rooms and areas in larger buildings, where those buildings or spaces are not heated.
A-11.2.1.2.(6) Air Barrier Systems. To measure the air infiltration rate of a construction, it is recommended that it be determined in accordance with CAN/CGSB-149.10, “Determination of the Airtightness of Building Envelopes by the Fan Depressurization Method”.
A-11.2.1.2.(8) Ventilation Requirements. The ventilation requirements with which new constructions must comply also include the requirements of Article 9.32.3.9. on carbon monoxide alarms.
A-11.2.2.1.(1) Building Components. For the purposes of Part 11, wall assemblies inclined less than 60° from horizontal are considered to be roof assemblies, and roof assemblies inclined 60° or more from horizontal are considered to be wall assemblies.
Except for tubular daylighting devices, the effective thermal resistance for walls required in Table 11.2.2.1.A. or 11.2.2.1.B. also applies to shafts for skylights.
A-11.2.2.1.(3) Performance Benchmark by Comparison of the Annual Energy Consumption. The concept of measuring performance by comparing the annual energy consumption of a reference construction to a proposed construction is one way to benchmark the performance of a proposed construction to Part 11 requirements. The performance requirements of this Code are consistent with an objective-based code of demonstrating a similar level of performance regardless of the path used.
The term “reference construction” means a hypothetical replica of the proposed construction design using the same energy sources for the same functions and having the same environmental requirements, occupancy and climate data, but made to comply with all applicable prescriptive requirements of Part 11.
The term “construction energy target” means the annual energy consumption of the reference construction.
The term “annual energy consumption” means the annual sum of heating energy consumption and space conditioning energy consumption of the proposed construction design. It must be noted that the annual energy consumption is not the real consumption but rather that provided by energy simulation.
The calculation procedure must determine the annual energy consumption for the proposed construction and a construction energy target for a reference construction. The annual energy consumption of the proposed construction must not exceed the construction energy target of the reference construction. Proof of those results must be available on request.
If a computer program is used to carry out the compliance calculations, the calculation methods shall be computed for both the referenced and the proposed construction models, and be tested according to ASHRAE 140, “Test for the Evaluation of Building Energy Analysis Computer Programs”, and variations of the computer program from the recommended different values must be calculated.
Where construction techniques or components used for construction are more energy efficient than those prescribed by the prescriptive requirements, performance compliance calculations are permitted to take this increased performance level in the determination of the annual energy consumption, provided it can be quantified and is not dependent on occupant interaction.
The energy model calculations must account for the annual energy consumption of facilities and equipment required for space heating and conditioning and for ventilation. The energy model calculations must account for heat transfer through wall assemblies, roof-ceiling assemblies and exposed floor assemblies due to thermal characteristics of the particular assembly and thermal bridging. The roof-ceiling assembly includes the attic. The building envelope assemblies and components required to be addressed are assemblies above and not in contact with the ground (walls and roof-ceiling assembly), assemblies in contact with the ground (floors and walls), and doors, windows and skylights.
Where the energy model calculations account for the effect of thermal mass, that thermal mass must exclude the contents of the construction.
Where skylights are installed in the roof, the gross roof area does not exclude the gross roof area of skylights.
The calculation procedure for the reference construction must include the same values as those used for the proposed construction with regards to the floor area, the heated volume, and the number and type of rooms.
The calculation procedure for the proposed construction must be consistent with the proposed construction specifications with regards to fenestration and opaque envelope assembly type, effective thermal resistance and areas but more specifically to
— the area of above ground portion of basement walls,
— thermal resistance of walls, below ground walls, ceiling below attics, roof assemblies and header joists,
— maximum overall thermal transmittance for doors,
— total thermal resistance of below ground walls and floors on ground,
— exterior walls, roof-ceiling assemblies, exposed floors, doors, walls and floors in contact with the ground,
— configuration of insulation in assemblies in contact with the ground, and
— thermal resistance of foundation walls.
The drawings and specifications provided for the proposed construction must include information to analyze construction compliance with regulations. It is suggested to include the following information:
— the values of thermal resistance and their respective areas for all opaque building envelope assemblies which includes all roof/ceiling, wall, and floor assemblies, above and below ground,
— the overall thermal transmittance of all fenestration and door components and their respective areas,
— the ratio of total fenestration and door area to exterior wall area,
— the design basis for the ventilation rates, and
— any additional features used in the compliance calculation that account for a significant difference in the proposed construction energy performance.
A proposed construction energy performance compliance calculation report must be provided for each proposed construction design that does not comply with the requirements of Part 11. In addition to the information of the drawings and specifications, the registration of which is suggested, the proposed construction performance compliance calculation report must contain
— a project information section consisting of
· project description,
· project address,
· name and version of the calculation tool,
· geographic region in which proposed construction is to be built;
— a summary of proposed construction envelope, HVAC characteristics,
— an energy performance data summary containing
· the annual energy consumption of all energy sources calculated for the proposed construction,
· the energy target of all energy sources calculated for the reference construction, and
— where a software program is used for compliance calculations
· the software program used.
A-11.2.2.1.(4) Thermal Resistance of Garages. This Sentence seeks to mitigate discomfort in spaces adjacent to a garage. Despite the presence of a heating system in the garage, the temperature is sometimes lowered to save on heating costs because the garage is seldom used or the garage door does not close tightly or is left open for extended periods. This causes discomfort in the rooms above, below or adjacent to the garage.
A-11.2.2.4.(1) Windows. For the purposes of Part 11, sliding doors must comply with the requirements on windows.
Not more than 1.85 m2 of glass block may be installed in the same construction where glass block has a maximum overall thermal transmittance equivalent to that of skylights as indicated in Table 11.2.2.4.A.
The overall thermal transmittance of doors may be obtained by the door or door assembly / storm door or door assembly / unheated vestibule enclosure panels.
A garage door giving access to vehicles need not comply with the values indicated in Table 11.2.2.4.A. even if that door has windows.
To minimize surface condensation on the warm side of windows, doors or skylights, it is recommended to install those components inside the insulation or near the vertical axis of the centre of the RSI value of insulating material. That recommendation does not apply to openings in foundation walls.
A-11.2.2.4.(3) Rough Openings. The area of rough openings includes the area occupied by frame openings. The term “opening” means windows, doors and other similar components such as glass blocks, clerestories, skylights, translucent wall panels, transoms or sidelights. Despite the foregoing, openings occupied by garage doors giving access to vehicles even if those doors have windows may be excluded in calculating the total area of openings.
Despite the fact that Part 11 does not contain requirements to minimize overheating that may be caused by translucent openings according to their size and direction, it is recommended to take it into consideration in order to minimize the energy load that would be needed to condition certain spaces.
A-11.2.3.1. Thermal Bridges. Minor penetrations such as ties, shims or any similar fastener such as members that may constitute a thermal bridge need not be taken into account.
Insulation of thermal bridges excludes the interior and exterior finishes of all construction and surface air films behind those finishes.
A-11.2.3.1.(1)(b) Thermal Bridge of Metal Frame Walls. In the case of a metal frame, the thermal resistance of insulating material covering a thermal bridge may be less than that set out in Sentence 11.2.3.1.(1) as long as it is high enough to ensure efficient thermal resistance value equivalent to similar composition made of wood.
A-11.2.3.1.(3) Thermal Bridge in a Wall Between Two Heated Spaces. A portion of a wall between two heated spaces incorporating a thermal bridge must be covered with insulating material to obtain a total thermal resistance of not less than 2.20 on each side of the wall over a minimum distance of 1.2 m from the exterior side of the exterior wall.”;
(20)  by adding the following at the end of note B-3.2.6.2.(3):
“Standard NFPA-92A, “Recommended Practice for Smoke-Control Systems”, suggests mechanical smoke control methods. These methods may be used as alternatives to venting required by this Article. Designers will, however, need to demonstrate that the method they propose under this standard satisfies the objectives of the Code.”.
O.C. 293-2008, s. 1; O.C. 939-2009, s. 3; O.C. 858-2012, s. 7.