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4.1.8.17.(12)
ApplicationIntent
OS2OP2
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
[F20,F22-OP2.3,OP2.4]
Application
Application 1: 
Design and construction of seismic restraint for suspended equipment, such as pipes, ducts and electrical cable trays.
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).
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 seismic restraint for suspended equipment will not be able to resist the specified earthquake loads and displacement requirements, which could lead to damage to or displacement of attached or adjacent components of the building, which could lead to severe damage to and falling of non-structural components, which could lead to:
  • damage to the building, or
  • damage to and functional failure of a component's system, which could impede the intended use and occupancy of the building.
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