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Ballast sizes

Sep 30, 2011 2.02 GRADATION REQUIREMENTS OF BALLAST 1. Ballast (AREMA Size No. 4A) shall fall within the following gradation requirements: Nominal Sieve Size (Square Opening) % Passing by Weight 2-1/2 inch 100 2 inch 90-100 1-1/2 inch 60-90 1 inch 10-35 3/4 inch 0

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