Application and Intent Statement

9.4.4.6.(1)

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OS2.1, OS2.3

APPLICATION:

Design lateral pressure on walls, including foundation walls and walls associated with exterior below-grade entrances and window wells, that are subject to lateral loads from drained earth (e.g. a foundation wall with footing drains), in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

To limit the probability that using inappropriate design pressures will lead to the walls being unable to resist expected lateral pressure, which could lead to the cracking of foundations or building superstructures.

This is to limit the probability of compromised structural integrity, which could lead to:

structural failure, or
for environmental separators or elements supporting environmental separators, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements.

This is to limit the probability of harm to persons.

To expand the application of Section 4.2. to walls supporting drained earth that are not constructed in accordance with Section 9.15.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OP2.1, OP2.3, OP2.4

APPLICATION:

INTENT:

This is to limit the probability of compromised structural integrity, which could lead to:

structural failure,
for environmental separators or elements supporting environmental separators, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements, which could lead to further compromised structural integrity, or
an inability to resist expected loads, which could lead to
- the excessive deformation or deflection of walls, or
- the excessive deflection or vibration of floors.

This is to limit the probability of:

the space being unsuitable for its intended use, or
damage to the building.

To expand the application of Section 4.2. to walls supporting drained earth that are not constructed in accordance with Section 9.15.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OH1.1, OH1.2, OH1.3

APPLICATION:

INTENT:

For walls serving as an environmental separator or supporting an environmental separator, this is to limit the probability of:

pollutant ingress (from the exterior or from adjacent interior space, including soil gas, combustion products from parking garages, and particulates),
precipitation ingress,
condensation, or
moisture ingress from the ground.

This is to limit the probability of:

an inadequate control of relative humidity or water accumulation,
the generation of pollutants from biological growth or from materials that become unstable on wetting, or
deterioration, which could lead to compromised integrity of elements supported by foundation walls.

This is to limit the probability of:

negative effects on the air quality of indoor spaces,
the inadequate thermal comfort of persons, and
contact with moisture.

This is to limit the probability of harm to persons.

To expand the application of Section 4.2. to walls supporting drained earth that are not constructed in accordance with Section 9.15.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OH4

APPLICATION:

INTENT:

This is to limit the probability of:

compromised structural integrity, or
for environmental separators or elements supporting environmental separators, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements, which could lead to compromised structural integrity.

For floors and elements supporting floors, this is to limit the probability of excessive movement, deflection or vibration of floors, which could lead to negative effects on the psychological well-being of persons.

To expand the application of Section 4.2. to walls supporting drained earth that are not constructed in accordance with Section 9.15.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

F20

To support and withstand expected loads and forces.

Objective:

OS3.1, OS3.7

APPLICATION:

INTENT:

This is to limit the probability of:

compromised structural integrity, or
for environmental separators or elements supporting environmental separators, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements, which could lead to compromised structural integrity.

This is to limit the probability of:

the excessive deflection or vibration of directly or indirectly supported floors, which could lead to persons losing their balance, tripping or falling, which could lead to harm to persons, or
the excessive movement or deformation of directly or indirectly supported walls with windows or doors, which could lead to compromised operation of doors or windows required for egress in an emergency.

This is to limit the probability of harm to persons.

To expand the application of Section 4.2. to walls supporting drained earth that are not constructed in accordance with Section 9.15.