MnDOT standard riprap gradations MnDOT standard riprap gradations

MnDOT standard riprap gradations
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Weight		Size		Approximate Percent of Total Weight Smaller than Given Weight
lb	kg	in	mm	Riprap Class
				I	II	III	IV	V
2,000	900	30	750	-	-	-	-	100
1,000	450	24	600	-	-	-	100	-
650	300	21	525	-	-	-	-	75
400	180	18	450	-	-	100	-	-
250	113	15	375	-	-	-	75	50
120	55	12	300	-	100	75	50	-
50	22	9	225	-	75	50	-	-
15	7	6	150	100	50	-	-	10
5	2	4	100	-	-	-	10	-
2	1	3	75	50	-	10	-	-
-	-	2	50	-	10	-	-	-
-	-	1	25	10	-	-	-	-