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4.1.8.17.(8)
ApplicationIntent
OS2OP2OS2OP2OS2OP2OS2OP2OS2OP2+
ObjectiveOS2 Structural Safety
Attribution
(b),(c) [F20,F22-OS2.4]
Application
Application 1: 
Element or component response modification factor for non-ductile connections and for anchorage using shallow expansion, chemical, epoxy or cast-in-place anchors, to be used in the design of connections for earthquake.
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.
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.
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Intent
Intent 1: 
To limit the probability that the component response modification factor will not reflect the limited ductility of such connections, which could lead to failure of the connections, which could lead to components of the building falling or sliding, which could lead to harm to persons.
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