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Structural and Environmental Loads
(See Note A-5.1.4.1.)
- 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
- all environmental loads, and effects of those loads, that may reasonably be expected having regard to
- the intended use of the building, and
- the environment to which the materials, components and assemblies are subject, and
- all structural loads, and effects of those loads, that may reasonably be expected.
- Where building materials, components or assemblies perform more than one function, they shall satisfy the requirements of all of those functions. (See Note A-5.1.4.1.(2).)
- Compliance with Clause (1)(a) shall be demonstrated by design complying with Subsection 5.2.1. and construction conforming to that design.
- Compliance with Clause (1)(b) shall be demonstrated by design complying with Subsection 5.2.2., and construction conforming to that design, with regard to
- materials, components and assemblies, and associated loads, that are identified in Part 4,
- air pressure loads imposed on air barrier systems,
- wind up-lift imposed on roofing, and
- hydrostatic pressure imposed on the means of protection from moisture in the ground.
- For materials, components, assemblies and loads to which Sentence (4) does not apply, compliance with Clause (1)(b) shall be demonstrated
- by design complying with Subsection 5.2.2. for individual applicable loads and construction conforming to that design, or
- 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).)
- 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 Article 5.2.2.1. shall
- transfer such loads to the building structure without adverse effects on the performance of other materials, components or assemblies,
- not deflect to a degree that adversely affects the performance of other materials, components or assemblies (see Note A-5.1.4.1.(6)(b) and (c)), and
- be designed, and constructed according to that design, to accommodate (see Note A-5.1.4.1.(6)(b) and (c))
- the maximum relative structural movement that may reasonably be expected, and
- construction tolerances that may be reasonably expected. (See Article 4.1.3.5., Sentence 4.1.3.3.(2) and Subsection 4.1.8. for information on different types of structural movements.)
(See Note A-5.1.4.1.)
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| 5.1.4.2. |
Resistance to Deterioration
(See Note A-5.1.4.2.)
- 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
- compatible with adjoining materials, and
- resistant to any mechanisms of deterioration that may reasonably be expected, given
- the nature and function of the materials, and
- the exposure and climatic conditions in which they will be installed.
- Material compatibility and deterioration resistance are not required where it can be shown that incompatibility or uncontrolled deterioration will not adversely affect any of
- the health or safety of building users,
- the intended use of the building, or
- the operation of building services.
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