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Bearing Capacity Chart - Delmag Diesel Pile Hammers

Delmag D12-32 & D12-42 Single Acting Diesel Pile Hammers Bearing Capacity (kips) 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
53 5.20 14664 176 196 213 227 240 250 260 269 277 284 291 297 303 309 314 319 324
52 5.40 15228 181 202 219 233 246 257 267 276 284 292 298 305 311 317 322 327 332
51 5.60 15792 186 207 225 240 252 264 274 283 291 299 306 312 319 324 330 335 340
50 5.80 16356 191 213 231 246 259 270 280 290 298 306 313 320 326 332 337 343 348
49 6.00 16920 196 218 236 251 265 276 287 296 305 313 320 327 333 339 345 350 355
48 6.30 17766 203 226 245 260 274 286 296 306 315 323 330 337 344 350 356 361 367
47 6.60 18612 211 234 253 269 282 295 306 316 325 333 341 348 354 361 367 372 377
46 6.80 19176 215 239 258 274 288 301 312 322 331 339 347 354 361 368 374 379 385
45 7.20 20304 224 249 268 285 299 312 324 334 343 352 360 368 375 381 387 393 399
44 7.50 21150 231 256 276 293 308 321 332 343 353 361 370 377 384 391 397 403 409
43 7.80 21996 238 263 283 301 316 329 341 352 362 371 379 387 394 401 407 413 419
42 8.20 23124 246 272 293 311 326 340 352 363 373 382 391 399 406 413 420 426 432
41 8.60 24252 255 281 303 321 337 351 363 374 385 394 403 411 419 426 433 439 445
40 9.10 25662 265 292 314 333 349 363 376 388 398 408 417 426 434 441 448 454 461
39 9.50 26790 273 300 323 342 359 374 387 398 409 419 428 437 445 453 460 466 473
38 10.00 28200 282 311 334 354 371 386 399 411 423 433 442 451 459 467 474 481 488
37 10.60 29892 294 323 347 367 385 400 414 427 438 449 458 467 476 484 491 498 505
36 11.20 31584 305 335 359 380 398 414 428 441 453 464 474 483 492 500 508 515 522
35 11.80 33276 315 346 372 393 411 428 442 456 468 479 489 499 508 516 524 531 538
34 12.50 35250 327 359 385 407 426 443 458 472 484 496 506 516 525 534 542 550 557

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

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