Bearing Capacity Chart - Delmag Diesel Pile Hammers

Delmag D30-32 Single Acting Diesel Pile Hammer
Bearing Capacity (tons) for a Pile Set (blows/in) of:
Blows Per Min. Piston Stroke (ft) Hammer Energy (ft-lbs) 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0
54 4.65 30760 150 165 177 187 196 204 211 217 223 228 233 238 242 246 250 254 257
53 4.84 32017 154 169 181 192 201 209 216 222 228 234 239 244 248 252 256 260 263
52 5.04 33340 158 173 186 197 206 214 221 228 234 240 245 250 254 258 262 266 270
51 5.25 34729 162 178 191 202 211 220 227 234 240 246 251 256 260 265 269 272 276
50 5.47 36184 167 183 196 207 217 225 233 240 246 252 257 262 267 271 275 279 283
49 5.71 37772 171 188 201 213 222 231 239 246 252 258 264 269 274 278 282 286 290
48 5.97 39492 176 193 207 218 229 237 245 253 259 265 271 276 281 285 290 294 298
47 6.24 41278 181 199 213 224 235 244 252 259 266 272 278 283 288 293 297 302 306
46 6.52 43130 186 204 218 231 241 250 259 266 273 279 285 291 296 301 305 309 313
45 6.83 45180 192 210 225 237 248 257 266 274 281 287 293 299 304 309 313 318 322
44 7.16 47363 198 216 231 244 255 265 274 281 289 295 301 307 312 317 322 327 331
43 7.51 49679 204 223 238 251 262 272 281 289 297 304 310 316 321 326 331 336 340
42 7.88 52126 210 229 245 258 270 280 289 298 305 312 319 325 330 335 340 345 350
41 8.29 54838 217 236 253 266 278 289 298 307 314 321 328 334 340 345 350 355 360
40 8.72 57683 223 244 260 274 287 297 307 316 324 331 338 344 350 355 361 366 370
39 9.19 60792 231 252 269 283 296 307 317 325 334 341 348 355 361 366 372 377 381
38 9.70 64166 238 260 277 292 305 316 327 336 344 352 359 366 372 378 383 388 393
37 10.25 67804 246 269 287 302 315 327 337 347 355 363 370 377 384 390 395 401 406
36 10.84 71707 255 278 296 312 325 337 348 358 367 375 382 389 396 402 408 413 419
35 11.48 75940 264 287 306 322 336 349 360 370 379 387 395 402 409 415 421 427 432

Calculates bearing capacities based upon FHWA modified Gates formula:
Ru = 0.5 [ 1.75 √E ( log 10N ) - 100 ]
where
Ru = Driven bearing capacity of the pile in tons
N = Number of hammer blows per inch
E = Energy developed by the hammer per blow in ft-lbs

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