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Bearing Capacity Chart - Delmag Diesel Pile Hammers

Delmag D25-32 Single Acting Diesel Pile Hammer
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 28652 285 314 338 357 375 390 403 416 427 437 447 455 464 472 479 486 492
52 5.40 29754 293 322 346 366 384 399 413 425 437 447 457 466 474 482 490 497 504
51 5.60 30856 300 330 354 375 392 408 422 435 447 457 467 476 485 493 501 508 515
50 5.80 31958 307 337 362 383 401 417 432 444 456 467 477 487 495 504 511 519 526
49 6.00 33060 314 345 370 391 410 426 441 454 466 477 487 497 506 514 522 529 536
48 6.30 34713 324 356 382 403 422 439 454 467 480 491 502 511 521 529 537 545 552
47 6.60 36366 334 367 393 415 435 452 467 481 493 505 516 526 535 544 552 560 567
46 6.80 37468 341 374 400 423 443 460 476 490 502 514 525 535 545 554 562 570 577
45 7.20 39672 353 387 415 438 458 476 492 507 520 532 543 554 563 573 581 589 597
44 7.50 41325 363 397 425 449 470 488 504 519 533 545 556 567 577 586 595 604 611
43 7.80 42978 372 407 436 460 481 500 516 531 545 558 569 580 590 600 609 618 626
42 8.20 45182 384 420 449 474 496 515 532 547 561 574 586 597 608 618 627 636 644
41 8.60 47386 396 433 463 488 510 530 547 563 577 591 603 614 625 635 644 653 662
40 9.10 50141 410 448 479 505 528 548 566 582 597 610 623 635 646 656 666 675 684
39 9.50 52345 421 460 491 518 541 562 580 597 612 626 639 651 662 673 682 692 701
38 10.00 55100 434 474 507 534 558 579 598 615 630 645 658 670 682 693 703 712 722
37 10.60 58406 450 491 525 553 578 599 619 636 652 667 680 693 705 716 727 736 746
36 11.20 61712 466 508 542 571 596 619 639 657 673 688 702 715 727 739 750 760 769
35 11.80 65018 481 524 559 589 615 638 658 677 693 709 723 737 749 761 772 783 792
34 12.50 68875 498 542 578 609 636 659 680 699 717 733 747 761 774 786 798 808 819

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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