Facts & Figures Book - KPI-JCI

RIPRAPRiprap, as used for facing dams, canals and waterways, isnormally a coarse, graded material. Typical general specificationswould call for a minimum 160 lb./ft.3 stone, freeof cracks and seams with no sand, clay, dirt, etc. A typicalspecification will probably give the percent passing byparticle weight such as:Percent Passing 15” Blanket 24” Blanket100 165 lbs. 670 lbs.50 - 70 50 lbs. 200 lbs.30 - 50 35 lbs. 135 lbs.0 - 15 10 lbs. 40 lbs.In order to relate the above weights to rock size, refer tothe following size/density chart:Weights of Riprap—PoundsCubicalSolid Rock Density—Lbs. Per Ft. 3 (Approx.)Size(in.) 145 150 155 160 165 170 175 180 1855 10 11 11 12 12 12 13 13 136 18 19 19 20 21 21 22 23 237 29 30 31 32 33 34 35 36 378 43 44 46 47 49 50 52 53 559 61 63 65 68 70 72 74 76 7810 84 87 90 93 95 98 101 104 10711 112 116 119 123 127 131 135 139 14212 145 150 155 160 165 170 175 180 18513 184 191 197 203 210 216 222 229 23514 230 238 246 254 262 270 278 286 29415 283 293 302 312 322 332 342 351 36116 344 356 367 379 391 403 415 426 43817 412 426 440 454 469 483 497 511 52618 489 506 523 539 556 573 590 607 62419 575 595 615 634 654 674 694 714 73420 671 694 717 740 763 786 810 833 85622 893 925 954 985 1016 1047 1078 1108 113924 1160 1200 1239 1279 1319 1359 1399 1439 147925 1475 1526 1575 1626 1677 1728 1779 1830 188128 1842 1905 1967 2031 2094 2158 2222 2285 234930 2265 2343 2419 2498 2576 2654 2732 2811 288932 2749 2844 2936 3031 3126 3221 3316 3411 350634 3298 3412 3522 3636 3750 3864 3978 4092 420636 3914 4050 4180 4316 4451 4586 4722 4857 499239 4978 5150 5321 5493 5664 5836 6008 6179 6351NOTE: The above is given as general information only; each job will carry itsindividual specification.204