The British Columbia Building Code | Section 5.1. | General
Division B: Acceptable Solutions Part 5 – Environmental Separation
British Columbia Building Code 2018 Division B
Section 5.1. General
5.1.1. Scope
5.1.1.1. Scope
1) This Part is concerned with
a) the control of condensation
i) in building components and assemblies, and
ii) on building materials, components and assemblies, and
b) the transfer of heat, air, moisture and sound through
i) building materials, components and assemblies, and
ii) interfaces between building materials, components and assemblies.
(See Note A-5.1.1.1.(1).)
5.1.2. Application
5.1.2.1. Exposure to Exterior Space or the Ground and Separation of Dissimilar
Environments
1) This Part applies, as described in Subsection1.3.3.of Division A, to
a) building materials, components and assemblies exposed to exterior space or the ground, including those
separating interior space from exterior space or separating interior space from the ground,
b) building materials, components and assemblies separating environmentally dissimilar interior spaces
(see NoteA-5.8.), and
c) site materials, components, assemblies and grading that may affect environmental loads on building materials,
components and assemblies exposed to exterior space or the ground.
(See NoteA-5.1.2.1.(1).)
5.1.3. Definitions
5.1.3.1. Defined Words
1) Words that appear in italics are defined in Article 1.4.1.2.of Division A.
5.1.4. Resistance to Loads and Deterioration
5.1.4.1. Structural and Environmental Loads
(See Note A-5.1.4.1.)
1) Building materials, components and assemblies that separate dissimilar environments or are exposed to the
exterior shall have sufficient capacity and integrity to resist or accommodate
a) all environmental loads, and effects of those loads, that may reasonably be expected having regard to
i) the intended use of the building, and
ii) the environment to which the materials, components and assemblies are subject, and
b) all structural loads, and effects of those loads, that may reasonably be expected.
2) Where building materials, components or assemblies perform more than one function, they shall satisfy the
requirements of all of those functions. (See NoteA-5.1.4.1.(2).)
3) Compliance with Clause(1)(a) shall be demonstrated by design complying with Subsection5.2.1. and
construction conforming to that design.
4) Compliance with Clause(1)(b) shall be demonstrated by design complying with Subsection5.2.2., and
construction conforming to that design, with regard to
Part 5 – Environmental Separation Division B: Acceptable Solutions
Division B British Columbia Building Code 2018
a) materials, components and assemblies, and associated loads, that are identified in Part 4,
b) air pressure loads imposed on air barrier systems,
c) wind up-lift imposed on roofing, and
d) hydrostatic pressure imposed on the means of protection from moisture in the ground.
5) For materials, components, assemblies and loads to which Sentence(4) does not apply, compliance with
Clause(1)(b) shall be demonstrated
a) by design complying with Subsection5.2.2. for individual applicable loads and construction conforming to
that design, or
b) in the case of common materials, components and assemblies, and their installation, by proven past
performance over a period of several years for individual applicable loads.
(See Note A-5.1.4.1.(5).)
6) Materials, components and assemblies separating dissimilar environments and assemblies exposed to the
exterior, including their connections, that are subject to structural loads as defined in Article5.2.2.1., shall
a) transfer such loads to the building structure without adverse effects on the performance of other materials,
components or assemblies,
b) not deflect to a degree that adversely affects the performance of other materials, components or assemblies
(seeNoteA-5.1.4.1.(6)(b) and (c)), and
c) be designed, and constructed according to that design, to accommodate (see NoteA-5.1.4.1.(6)(b) and (c))
i) the maximum relative structural movement that may reasonably be expected, and
ii) construction tolerances that may be reasonably expected.
(See Article4.1.3.5., Sentence4.1.3.3.(2) and Subsection4.1.8. for information on different types of structural
movements.) (SeeNoteA-5.1.4.1.)
5.1.4.2. Resistance to Deterioration
(See NoteA-5.1.4.2.)
1) Except as provided in Sentence(2), materials used in building components and assemblies that separate
dissimilar environments, or in assemblies exposed to the exterior, shall be
a) compatible with adjoining materials, and
b) resistant to any mechanisms of deterioration that may reasonably be expected, given
i) the nature and function of the materials, and
ii) the exposure and climatic conditions in which they will be installed.
2) Material compatibility and deterioration resistance are not required where it can be shown that
incompatibility or uncontrolled deterioration will not adversely affect any of
a) the health or safety of building users,
b) the intended use of the building, or
c) the operation of building services.
5.1.5. Reserved
Division B: Acceptable Solutions Part 5 – Environmental Separation
British Columbia Building Code 2018 Division B
Section 5.10. Objectives and Functional Statements
5.10.1. Objectives and Functional Statements
5.10.1.1. Attributions to Acceptable Solutions
1) For the purpose of compliance with this Code as required in Clause 1.2.1.1.(1)(b)of Division A, the
objectives and functional statements attributed to the acceptable solutions in this Part shall be the objectives and
functional statements listed in Table 5.10.1.1. (See Note A-1.1.2.1.(1).)
Part 5 – Environmental Separation Division B: Acceptable Solutions
Division B British Columbia Building Code 2018
Table 5.10.1.1.
Objectives and Functional Statements Attributed to the Acceptable Solutions in Part 5
Forming Part of Sentence 5.10.1.1.(1)
Functional Statements and Objectives
(1)
5.1.4.1. Structural and Environmental Loads
(1) (a) [F55,F61,F63-OH1.1,OH1.2,OH1.3]
[F20-OS3.1] Applies to snow fences and sloped glazing.
[F61-OH4]
(a) [F60,F61,F63-OS2.2,OS2.3]
(a) [F20,F51,F55-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
(b) [F20-OS2.1] [F21,F22-OS2.3,OS2.4]
(b) [F20,F21,F22-OH1.1,OH1.2,OH1.3]
(b) [F20-OH4]
(4) [F20-OS2.1] [F21,F22-OS2.3,OS2.4]
[F20,F21,F22-OH1.1,OH1.2,OH1.3]
(5) (a) [F20-OS2.1] [F21,F22-OS2.3,OS2.4]
(a) [F20,F21,F22-OH1.1,OH1.2,OH1.3]
(b) [F20-OS2.1] [F21,F22-OS2.3,OS2.4]
(b) [F20,F21,F22-OH1.1,OH1.2,OH1.3]
(6) [F20,F21,F22-OH1.1,OH1.2,OH1.3]
(a) [F20-OS2.1,OS2.3]
(b) and (c) [F21,F22-OS2.3]
(b) and (c) [F22-OH4]
5.1.4.2. Resistance to Deterioration
(1) [F80,F81-OH1.1,OH1.2,OH1.3]
[F80,F81-OS3.1] Applies to floor assemblies.
[F80,F81-OH4] Applies to floor assemblies.
[F80,F81-OS2.3]
[F80,F81-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
5.2.1.1. Exterior Environmental Loads
(2) [F40,F20-OH1.1] [F20-OH1.2,OH1.3]
[F20-OS2.1]
5.2.1.2. Interior Environmental Loads
(1) [F51,F55,F61,F63-OH1.1,OH1.2]
[F55,F61,F63-OS2.3]
[F51,F61,F63,F55-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
5.2.1.3. Environmental Load and Transfer Calculations
(1) [F56-OH3.1] Applies to sound transmission calculations.
[F61,F51,F63,F55-OH1.1,OH1.2] [F51,F61-OH1.3] Applies to heat, air and moisture transfer calculations.
[F61,F51,F63-OS2.3] Applies to heat, air and moisture transfer calculations.
Division B: Acceptable Solutions Part 5 – Environmental Separation
British Columbia Building Code 2018 Division B
(3) [F61,F63,F55-OH1.1,OH1.2] [F61,F55-OH1.3]
[F20-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
[F20-OS2.1]
5.2.2.1. Determination of Structural Loads and Effects
(1) [F20-OS2.1] [F21,F22-OS2.3,OS2.4]
[F20,F21,F22-OH1.1,OH1.2,OH1.3]
[F20,F21,F22-OH4]
(3) [F20-OS2.1] [F21,F22-OS2.3,OS2.4]
[F20,F21,F22-OH1.1,OH1.2,OH1.3]
[F20,F21,F22-OH4]
5.2.2.2. Determination of Wind Load
(2) [F20-OS2.1] [F22-OS2.3,OS2.4]
[F20,F22-OH1.1,OH1.2,OH1.3]
[F20,F22-OH4]
(3) [F20-OS2.1] [F22-OS2.3,OS2.4]
[F20,F22-OH1.1,OH1.2,OH1.3]
[F20,F22-OH4]
(4) [F20,F55,F61-OH1.1,OH1.2,OH1.3]
[F20,F55,F61-OS2.1,OS2.3]
5.2.2.3. Design Procedures
(1) [F20-OS2.1] [F22-OS2.3,OS2.4]
[F20,F22-OH1.1,OH1.2,OH1.3]
[F20,F22-OH4]
5.3.1.1. Required Resistance to Heat Transfer
(1) [F63-OH1.1] [F51,F63-OH1.2]
[F63-OS2.3]
[F51,F63-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
5.3.1.2. Properties to Resist Heat Transfer or Dissipate Heat
(1) (a),(b) [F51,F63-OH1.1]
(c) [F51-OH1.2]
(b) and (d) [F51,F63-OS2.3]
(b) [F51,F63-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
(d) [F30-OS3.1]
5.3.1.3. Location and Installation of Materials Providing Thermal Resistance
(1) [F51,F63-OH1.1]
[F63-OS2.3]
Table 5.10.1.1. (continued)
Objectives and Functional Statements Attributed to the Acceptable Solutions in Part 5
Forming Part of Sentence 5.10.1.1.(1)
Functional Statements and Objectives
(1)
Part 5 – Environmental Separation Division B: Acceptable Solutions
Division B British Columbia Building Code 2018
(2) [F51,F63-OH1.1,OH1.2]
[F63-OS2.3]
[F51,F63-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
5.4.1.1. Required Resistance to Air Leakage
(1) (a),(b),(f) [F51,F52,F54,F55-OH1.2]
(a),(b),(c),(e) [F40,F55-OH1.1]
(c) [F55,F61,F63-OH1.3]
(c) and (d) [F61,F62,F63,F55-OS2.3]
(d) [F55,F62-OS3.1]
(f) [F55,F62-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
(2) [F40-OH1.1] [F52,F54-OH1.2]
[F51,F55,F61,F63-OH1.1,OH1.2,OH1.3]
[F61,F63-OS2.3]
[F51,F55-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
5.4.1.2. Air Barrier System Properties
(1) [F55-OH1.1,OH1.2,OH1.3]
[F55-OS2.3]
[F55-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
(3) [F61,F51,F63,F55-OH1.1,OH1.2] [F55,F61-OH1.3]
[F61,F63-OS2.3]
[F61,F51,F63-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
5.5.1.1. Required Resistance to Vapour Diffusion
(1) [F63-OH1.1,OH1.2]
[F63-OS2.3]
(2) [F63-OH1.1,OH1.2]
[F63-OS2.3]
5.5.1.2. Vapour Barrier Properties and Installation
(1) [F63-OH1.1,OH1.2]
[F63-OS2.3]
(2) [F63-OH1.1,OH1.2]
[F63-OS2.3]
(3) [F63-OH1.1,OH1.2]
[F63-OS2.3]
5.6.1.1. Required Protection from Precipitation
(1) [F61-OH1.1,OH1.2,OH1.3]
[F61-OS2.3]
Table 5.10.1.1. (continued)
Objectives and Functional Statements Attributed to the Acceptable Solutions in Part 5
Forming Part of Sentence 5.10.1.1.(1)
Functional Statements and Objectives
(1)
Division B: Acceptable Solutions Part 5 – Environmental Separation
British Columbia Building Code 2018 Division B
5.6.1.2. Installation of Protective Materials
(1) [F61-OH1.1,OH1.2,OH1.3]
[F61-OS2.3]
(2) [F61-OH1.1,OH1.2,OH1.3]
[F61-OS2.3]
5.6.2.1. Sealing and Drainage
(1) [F61,F62-OH1.1,OH1.2,OH1.3]
[F61,F62-OS2.3]
5.6.2.2. Accumulation and Disposal
(1) [F30-OS3.1]
(2) [F61-OH1.1,OH1.2,OH1.3]
[F61-OS2.3]
(3) [F61-OH1.1,OH1.2,OH1.3]
[F60-OS2.3] [F21-OS2.2]
(b) [F21-OP2.6]
(4) [F61-OH1.1,OH1.2,OH1.3]
[F61-OS2.3]
5.7.1.2. Required Protection
(1) [F60-OH1.1,OH1.2,OH1.3]
[F60-OS2.3]
(2) [F60-OH1.1,OH1.2,OH1.3]
[F60-OS2.2,OS2.3]
5.7.3.2. Required Protection
(1) [F61-OH1.1,OH1.2,OH1.3]
[F61-OS2.3]
5.7.3.3. Waterproofing
(1) [F61-OH1.1,OH1.2,OH1.3]
[F61-OS2.3]
5.7.3.4. Where Dampproofing is Permitted
(1) [F61-OH1.1,OH1.2,OH1.3]
[F61-OS2.3]
(2) [F61-OH1.1,OH1.2,OH1.3]
[F61-OS2.3]
5.8.1.1. Required Protection
(1) [F56-OH3.1]
(2) [F56-OH3.1]
Table 5.10.1.1. (continued)
Objectives and Functional Statements Attributed to the Acceptable Solutions in Part 5
Forming Part of Sentence 5.10.1.1.(1)
Functional Statements and Objectives
(1)
Part 5 – Environmental Separation Division B: Acceptable Solutions
Division B British Columbia Building Code 2018
5.8.1.2. Determination of Sound Transmission Ratings
(1) [F56-OH3.1]
(2) [F56-OH3.1]
5.8.1.4. Detailed Method for Calculating ASTC
(1) [F56-OH3.1]
(2) [F56-OH3.1]
(3) [F56-OH3.1]
(4) [F56-OH3.1]
(5) [F56-OH3.1]
(6) [F56-OH3.1]
(7) [F56-OH3.1]
5.8.1.5. Simplified Method for Calculating ASTC
(1) [F56-OH3.1]
(2) [F56-OH3.1]
(3) [F56-OH3.1]
(4) [F56-OH3.1]
(5) [F56-OH3.1]
(6) [F56-OH3.1]
5.9.1.1. Compliance with Applicable Standards
(1) [F20,F22,F51,F54,F55,F61,F63,F80-OH1.1,OH1.2] [F41,F55-OH1.1] [F55,F61,F80-OH1.3]
[F20,F80-OS2.1] [F20,F22,F51,F61,F63,F80-OS2.3] [F51-OS2.5]
[F80,F61,F63-OS3.1]
[F80,F61,F63-OH4] Applies to floor assemblies.
(a) [F61,F63-OS1.4] Applies where required life safety systems are incorporated in environmental separators.
[F20,F80-OP2.1,OP2.3] [F22,F80-OP2.4]
[F42-OH2.5]
5.9.2.2. Applicable Standards
(1) [F20,F55,F61,F63-OH1.1,OH1.3] [F20,F55,F61,F63,F81-OH1.2]
[F20,F55,F61-OS2.3]
[F20,F55,F61-OP2.3]
5.9.2.4. Heat Transfer
(2) [F63-OH1.1,OH1.2]
[F63-OS2.3]
Table 5.10.1.1. (continued)
Objectives and Functional Statements Attributed to the Acceptable Solutions in Part 5
Forming Part of Sentence 5.10.1.1.(1)
Functional Statements and Objectives
(1)
Division B: Acceptable Solutions Part 5 – Environmental Separation
British Columbia Building Code 2018 Division B
5.9.4.1. Structural Loads, Heat Transfer, Air Leakage, Vapour Diffusion and Water Penetration
(1) (b) [F61,F62-OH1.1,OH1.2,OH1.3]
(b) [F61,F62-OS2.3]
Notes to Table5.10.1.1.:
(1) See Parts 2 and 3 of Division A.
Table 5.10.1.1. (continued)
Objectives and Functional Statements Attributed to the Acceptable Solutions in Part 5
Forming Part of Sentence 5.10.1.1.(1)
Functional Statements and Objectives
(1)
Division B: Acceptable Solutions Part 5 – Environmental Separation
British Columbia Building Code 2018 Division B
5.9.4.1. Structural Loads, Heat Transfer, Air Leakage, Vapour Diffusion and Water Penetration
(1) (b) [F61,F62-OH1.1,OH1.2,OH1.3]
(b) [F61,F62-OS2.3]
Notes to Table5.10.1.1.:
(1) See Parts 2 and 3 of Division A.
Table 5.10.1.1. (continued)
Objectives and Functional Statements Attributed to the Acceptable Solutions in Part 5
Forming Part of Sentence 5.10.1.1.(1)
Functional Statements and Objectives
(1)