(See Note A-5.1.4.1.)
(1)
Building materials, components and assemblies that separate dissimilar environments or are exposed to the exterior shall be designed and constructed to provide 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 be reasonably expected.
(2)
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))
(3)
Compliance with Clause (1)(a) shall be demonstrated by design complying with Subsection 5.2.1. and construction conforming to that design.
(4)
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
(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 Subsection 5.2.2. 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 Article 5.2.2.1. 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, and (See Note A-5.1.4.1.(6)(b) and (c))
(c)
be designed, and constructed according to that design, to accommodate, (See Note A-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 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.)