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4.1.8.4.(5)
ApplicationIntent
OS2OP2
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
[F20-OP2.1] [F22-OP2.4]
Application
Application 1: 
Acceleration- and velocity-based site coefficients, Fa and Fv, to be used in earthquake calculations for Site Class F.
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 calculation of effects due to earthquake will not take into account the properties of the site response for soil profiles for which site amplification is problematic, which could lead to:
  • the excessive deformation of, or excessive stress in, the structural elements, which could lead to damage to the building, or
  • the excessive deformation of, or excessive stress in, the building structure, which could lead to damage to the building, which could impede the intended use and occupancy of the building.
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