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Bearing Capacity Chart - Delmag Diesel Pile Hammers

Delmag D80-23 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 82026 276 300 320 337 351 364 376 386 396 404 412 420 427 434 440 446 451
53 4.84 85378 283 307 328 345 360 373 384 395 405 414 422 429 437 443 450 456 461
52 5.04 88906 289 315 335 353 368 381 393 404 414 423 431 439 447 453 460 466 472
51 5.25 92610 296 322 343 361 377 390 402 413 423 433 441 449 457 464 470 477 483
50 5.47 96491 304 330 351 370 385 399 412 423 433 443 451 460 467 474 481 488 494
49 5.71 100724 311 338 360 379 395 409 422 433 444 453 462 471 478 486 493 499 505
48 5.97 105311 319 347 369 388 405 419 432 444 455 465 474 482 490 498 505 512 518
47 6.24 110074 328 356 379 398 415 430 443 455 466 476 486 494 502 510 517 524 531
46 6.52 115013 336 365 388 408 425 441 454 466 478 488 498 506 515 523 530 537 543
45 6.83 120481 345 375 399 419 437 452 466 479 490 501 510 519 528 536 544 551 557
44 7.16 126302 355 385 409 430 448 464 478 491 503 514 524 533 542 550 558 565 572
43 7.51 132476 364 395 420 442 460 477 491 504 516 527 538 547 556 564 572 580 587
42 7.88 139003 374 406 432 454 473 489 504 518 530 541 552 562 571 579 588 595 602
41 8.29 146236 385 418 444 467 486 503 518 532 545 557 567 577 587 596 604 612 619
40 8.72 153821 396 430 457 480 500 517 533 547 560 572 583 593 603 612 621 629 636
39 9.19 162112 408 442 470 494 514 532 549 563 576 589 600 611 620 630 638 647 655
38 9.70 171108 421 456 485 509 530 548 565 580 594 606 618 629 639 648 657 666 674
37 10.25 180810 434 470 500 524 546 565 582 598 612 625 636 648 658 668 677 686 694
36 10.84 191218 448 485 515 541 563 583 600 616 630 644 656 667 678 688 698 707 715
35 11.48 202507 462 500 532 558 581 601 619 635 650 664 677 688 699 710 719 729 738

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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