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<br />EM 1110-2.1601
<br />1 Jut 91
<br />
<br />Table 3-1
<br />Gradation. for Riprap Placement in the Dry, Low-Turbulence Zon..
<br />Limits of Srone Weicht. lb 1, for Percen! Uahter bv Weiaht
<br />D,oo(max) 100 50 15 D3D<min) D90(min)
<br />in. Max Min Max"' Mjn Max"' Min It It
<br />Specific Weight. 155 pel
<br />12 81 32 24 16 12 5 0.48 0.70
<br />15 159 63 47 32 23 10 0.61 0.88
<br />18 274 110 81 55 41 17 0.73 1.06
<br />21 43S 174 129 87 64 27 0.85 1.23
<br />24 649 260 192 130 96 41 0.97 1.40
<br />27 924 370 274 185 137 59 1.10 1.59
<br />30 1,268 507 376 264 188 79 1.22 1.77
<br />33 1,688 675 500 338 250 105 1.34 1.94
<br />36 2,191 877 649 438 325 137 1.46 2.11
<br />42 3,480 1,392 1,031 696 516 217 1.70 2.47
<br />48 5,194 2,078 1,539 1,039 769 325 1.95 2.82
<br />64 7,396 2,958 2,191 1,479 1,096 462 2.19 3.17
<br />Specific Weight. 165 pel
<br />12 86 35 26 17 13 5 0.48 0.70
<br />15 169 67 50 34 25 11 0.61 0.88
<br />18 292 117 86 58 43 18 0.73 1.06
<br />21 463 165 137 93 69 29 0.85 1.23
<br />24 691 275 205 138 102 43 0.97 1.40
<br />27 984 3S4 292 197 146 62 1.10 1.59
<br />30 1,350 540 400 270 200 84 1.22 1.77
<br />33 1,797 719 532 359 266 112 1.34 1.96
<br />36 2,331 933 691 467 346 146 1.46 2.11
<br />42 3,704 1,482 1,098 741 549 232 1.70 2.47
<br />48 5,529 2,212 1,638 1,106 819 346 1.95 2.82
<br />54 7,873 3,149 2.335 1,575 1,168 492 2.19 3.17
<br />Specific Weight. 175 pel
<br />12 92 37 27 18 14 5 0.48 0,70
<br />15 179 72 53 36 27 11 0.61 0.88
<br />18 309 124 92 62 46 19 0.73 1.06
<br />21 491 196 146 98 73 31 0.85 1.23
<br />24 733 293 217 147 109 46 0.97 1.40
<br />27 1,044 417 309 209 155 65 1.10 1.59
<br />30 1,432 573 424 2B6 212 89 1.22 1.77
<br />33 1,906 762 565 381 282 119 1.34 1.94
<br />36 2,474 990 733 495 367 155 1.46 2,11
<br />42 3,929 1,571 1,184 786 682 246 1.70 2.47
<br />48 5,864 2.346 1.738 1,173 869 367 1.95 2.82
<br />54 8,350 3,340 2,474 1,670 1,237 522 2.19 3.17
<br />Noms:
<br />,. Stone weight limit dam from ETL 1110.2.120 {HQUSACE, 1971 (14 May), .Additional Guidance for Riprap Channel Protection, Ch ,'-
<br />US Government Printing Office, Washington, DC}. Relationship belWll8n diameter and weight is besed on Ihe shape of a sphere.
<br />2. The maximum UmilS 811l1e Wso and W'5 sizes can be increased as in !he Lower Mississippi Valley Division Standardized Gradations
<br />shown in AppenQx F.
<br />
<br />3-3
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