Sentence 4.1.7.3.(1)

Intent 1:

To limit the probability that the calculation of specified wind pressure or suction on exterior surfaces of buildings will not take into account all the factors that affect the expected maximum magnitude and distribution of wind pressure or suction on exterior 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 or excessive vibration of the building, which could impede its intended use and occupancy.

Intent 2:

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.