Application | Application 1: Design of the following elements of buildings and
their anchorage to accommodate the building deflections,
as defined in Article 4.1.8.13., and the element or component deflections,
as defined in Sentence 4.1.8.17.(10), and for a lateral force, V p,
using the formula provided:
- all exterior and interior walls, and their connectors,
- exterior and interior ornamentations and appendages,
- floors and roofs acting as diaphragms,
- towers, chimneys, smokestacks and
penthouses that are connected to, or form part of, a building,
- horizontally cantilevered floors, balconies, beams, etc.,
- suspended ceilings, light fixtures and other attachments to
ceilings with independent vertical support,
- masonry veneer connections,
- access floors,
- masonry or concrete fences over 1.8 m tall,
- machinery, fixtures, equipment, ducts, and tanks (including
contents),
- flat bottom tanks (including contents) attached directly to
a floor at or below grade within a building,
- pipes, ducts, cable trays (including contents),
- electrical cable trays, bus ducts, conduit,
- rigid components, and
- flexible components.
Exceptions:
except as stated in:
- Sentence 4.1.8.1.(1), which applies to areas where the
spectral response acceleration amplified for site conditions equals the floor
levels found in low seismicity regions with Site Class C (i.e. very dense soil and soft rock ), and
- Sentence 4.1.8.17.(2), which applies to the following
elements of non-post-disaster buildings in areas
where IEFaSa(0.2) is less than 0.35:
- horizontally cantilevered floors, balconies, beams, etc.
- suspended ceilings, light fixtures and other attachments to
ceilings with independent vertical support
- masonry veneer connections
- access floors
- masonry or concrete fences over 1.8 m tall
- machinery, fixtures, equipment, ducts, and tanks (including
contents)
- flat bottom tanks (including contents) attached directly to
a floor at or below grade within a building
- pipes, ducts, cable trays (including contents)
- electrical cable trays, bus ducts, conduit,
- rigid components, and
- flexible components.
This applies to buildings described
in Sentence 1.3.3.2.(1) of Division A and to buildings to
which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application
of Part 9] that are required to be designed in accordance with the requirements
of Part 4.
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Intent | Intent 1: To limit the probability that the expected seismic distortion
of the building structure will damage or displace architectural, mechanical
or electrical components, which could lead to:
- elements of the building falling or sliding, which could lead
to damage to the building, or
- the functional failure of architectural, mechanical or electrical
systems or part thereof, which could impede the intended use and occupancy
of the building.
Intent 2: To limit the probability that the lateral seismic force
used for the design of anchorage for architectural, mechanical or electrical
components, will not take into account all the factors that affect the expected
magnitude of the inertial seismic force, which could lead to:
- failure of the anchorage, which could lead to damage to the
component and, if it falls, damage to the building, or
- damage to attached architectural, mechanical or electrical systems,
which could lead to their functional failure, which could impede the intended
use and occupancy of the building.
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