Back4.1.8.11.(9)

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OS2.1

 

APPLICATION:

Calculation of torsional sensitivity for structures with rigid diaphragms, to be used in the determination of structural irregularity Type 7 in Article 4.1.8.6.
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.

INTENT:

To limit the probability that the determination of the torsional sensitivity will not use a three-dimensional elastic model of the Seismic Force Resisting System with the static lateral loads at each floor level applied to account for accidental eccentricity, which could lead to structural failure, which could lead to harm to persons.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OP2.1, OP2.4

 

APPLICATION:

Calculation of torsional sensitivity for structures with rigid diaphragms, to be used in the determination of structural irregularity Type 7 in Article 4.1.8.6.
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.

INTENT:

To limit the probability that the determination of the torsional sensitivity will not use a three-dimensional elastic model of the Seismic Force Resisting System with the static lateral loads at each floor level applied to account for accidental eccentricity, 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.