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<br />Size Nominal Size <br />Square 3/4 inch 1/2 inch 3/8 inch No.4 No.8 No. 16 No. 50 <br />No. Openings <br />I 3 1/2 inches to 1 o to 5 <br />1/2 inches <br />2 2 1/2 inches to I o to 5 <br />1/2 inches <br />24 2 1/2 inches to o to 10 o to 5 <br />3/4 inch <br />3 2 inches to I o to 5 <br />inch - <br />357 2 inches to No. 10 to 30 o to 5 <br /> - - <br />4 <br />4 I 1/2 inches to o to 15 o to 5 <br />3/4 inch - <br />467 1 1/2 inches to 35 to 70 10 to 30 o to 5 <br />No.4 - <br />5 I inch to 1/2 20 to 55 o to 10 o to 5 <br />inch <br />56 I inch to 3/8 40 to 85 10 to 40 o to 15 o to 5 <br />inch <br />57 I inch to No.4 - 25 to 60 - o to 10 o to 5 <br />6 3/4 inch to 3/8 90 to 100 20 to 55 o to 15 o to 5 <br />inch <br />67 3/4 inch to No. 90 to 100 20 to 55 o to 10 o to 5 <br />4 - <br />68 3/4 inch to No. 90 to 100 30 to 65 5 to 25 o to 10 o to 5 <br />8 - <br />7 1/2 inch to No. 100 90 to 100 40 to 70 o to 15 o to 5 <br />4 <br />78 1/2 inch to No. 100 90 to 100 40 to 75 5 to 25 o to 10 o to 5 <br />8 <br />8 3/8 inch to No. 100 85 to 100 10 to 30 o to 10 o to 5 <br />8 - <br />89 3/8 inch to No. 100 90 to 100 20 to 55 5 to 30 o to 10 o to 5 <br />16 - <br />9 No.4 to No. 16 - - 100 85 to 100 I 0 to 40 o to I 0 o to 5 <br />10 No.4 to 0 - - 100 85 to 100 - - - <br /> <br />The gradations in Table I represent the extreme limits for the various sizes <br />indicated which will be used in determining the suitability for use of coarse aggregate from all <br />sources of supply. For any grade from anyone source, the gradation shall be held reasonably <br />uniform and not subject to the extreme percentages of gradation specified above. <br />