4.1.7.4.(1)

Intent 1:

To limit the probability that the design of interior walls and partitions will not take into account the:

• wind action on and within the building,
• stack effect due to the difference between the outdoor and indoor temperature, and
• mechanical air pressurization of the building.

This is to limit the probability that the difference in air pressure on opposite sides of a wall or partition will exceed the capacity of the wall or partition, which could lead to structural failure of interior walls and partitions, which could lead to harm to persons.