4.1.7.1.(3)

Intent 1:

To limit the probability that the calculation of net wind pressure on a building surface will not take into account how external and internal pressures or suctions on building surfaces act to produce forces in structural elements, which could lead to:

• the excessive deformation of, or excessive stress in, structural elements, which could lead to damage to the building, or
• the excessive deflection of structural elements, which could impede the intended use and occupancy of the building.

Intent 2:

To limit the probability that the calculation of specified wind pressures or suctions on interior surfaces of buildings will not take into account all the factors that affect the expected maximum magnitude and distribution of wind pressures or suctions on interior surfaces of buildings, which could lead to:

• the excessive deformation of, or excessive stress in, structural elements, which could lead to damage to the building, or
• the excessive deflection of structural elements, which could impede the intended use and occupancy of the building.

Intent 3:

To limit the probability that the calculation of wind load used for the design of cladding and structural elements for deflection will not take into account the level of reliability appropriate for deflection serviceability, which could lead to:

• the excessive deformation of, or excessive stress in, structural elements, which could lead to damage to the building, or
• the excessive deflection of structural elements, which could impede the intended use and occupancy of the building.