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Flag

Sidewalk Anatomy & Site Components
Flag The individual concrete square that makes up a sidewalk, typically five feet by five feet in NYC, separated from neighboring flags by expansion or control joints.

Flags are the unit DOT works in for nearly every purpose: a Notice of Sidewalk Violation cites specific numbered flags on its diagram, contractors price repairs per flag or per square foot, and a defective flag must be replaced in full rather than patched. Because DOT requires full-depth replacement of a cited flag rather than a surface patch, an owner can't satisfy a violation by resurfacing just the top layer of concrete. Knowing your flag count up front is one of the fastest ways to get an accurate repair quote.

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