Application and Intent Statement

9.23.15.4.(1)

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OS2.1, OS2.3, OS2.5, OS2.3, OS2.5

APPLICATION:

Staggered joints of wood-based panels used for roof sheathing, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.], where:

the sheathing is applied with the surface grain parallel to the roof ridge, and
the edges of the panels are required to be supported as specified in Article 9.23.15.7.

INTENT:

To limit the probability of aligned joints, which could lead to inadequate strength, which could lead to an inability to resist expected gravity and lateral loads, which could lead to the excessive deflection of sheathing between roof framing members, which could lead to damage to roofing.

This is to limit the probability of precipitation ingress, which could lead to deterioration, which could lead to compromised structural integrity of the roof, which could lead to harm to persons.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OP2.1, OP2.3, OP2.5, OP2.3, OP2.5

APPLICATION:

Staggered joints of wood-based panels used for roof sheathing, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.], where:

the sheathing is applied with the surface grain parallel to the roof ridge, and
the edges of the panels are required to be supported as specified in Article 9.23.15.7.

INTENT:

This is to limit the probability of precipitation ingress, which could lead to deterioration, which could lead to compromised structural integrity of the roof, which could lead to damage to the building.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OH1.1, OH1.2, OH1.3

APPLICATION:

Staggered joints of wood-based panels used for roof sheathing, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.], where:

the sheathing is applied with the surface grain parallel to the roof ridge, and
the edges of the panels are required to be supported as specified in Article 9.23.15.7.

INTENT:

Where wood-frame construction supports or is part of an environmental separator, this is to limit the probability of the displacement or failure of required environmental separation elements, which could lead to:

precipitation ingress, or
compromised thermal performance of components intended to resist heat transfer.

This is to limit the probability of:

an inadequate control of temperatures of interior spaces or water accumulation,
the generation of pollutants from biological growth or from materials that become unstable on wetting, or
deterioration, which could lead to further compromised integrity of environmental separators.

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.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OS1.2

APPLICATION:

Staggered joints of wood-based panels used for roof sheathing, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.], where:

the sheathing is applied with the surface grain parallel to the roof ridge, and
the edges of the panels are required to be supported as specified in Article 9.23.15.7.

INTENT:

Where assemblies are required to provide fire resistance, this is to limit the probability of compromised fire resistance of the assembly, which could lead to harm to persons.