Back4.1.8.11.(7)

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OS2.1

 

APPLICATION:

Equations for determining the overturning moments, Mx, and the associated moment reduction factor, Jx, for all levels of buildings.
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 structure will not be designed for overturning moments, which could lead to structural failure, which could lead to harm to persons.
To modify the calculation for the overturning moments because the higher modes that are included in the base shear do not contribute significantly to the overturning moments.

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:

Equations for determining the overturning moments, Mx, and the associated moment reduction factor, Jx, for all levels of buildings.
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 structure will not be designed for overturning moments, 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.
To modify the calculation for the overturning moments because the higher modes that are included in the base shear do not contribute significantly to the overturning moments.