What is the key distinguishing characteristic of a 'head-of-wall' firestop condition compared to a standard through-penetration?
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A
It involves a penetrating pipe rather than a wall joint
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B
It is a linear joint between the top of a partition and a structure above, not a discrete penetration
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C
It requires a higher F rating than a through-penetration in the same wall
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D
It is only applicable to exterior curtain wall assemblies