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9.26.4.4.(3)
OH1OS2OS1OP1OS3
ObjectiveOS2 Structural Safety
Attribution
Application
Application 1: 
Step flashing for intersections of shingle roofs and masonry walls or chimneys, parallel to the roof slope, on buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of an inappropriate flashing configuration, which could lead to precipitation or meltwater spreading horizontally as it descends the roof slope and flowing beyond the area protected by the horizontal leg of flashing, which could lead to precipitation or meltwater ingress, which could lead to deterioration, which could lead to the structural failure of roofs, masonry walls or chimneys, or elements protected by such assemblies, which could lead to harm to persons.
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