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Bearing Capacity Chart - Delmag Diesel Pile Hammers

Delmag D5-43 Single Acting Diesel Pile Hammers
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 5115 31 37 42 47 50 53 56 59 61 63 65 67 69 71 72 74 75
53 4.84 5324 33 39 44 49 52 56 58 61 64 66 68 70 72 73 75 76 78
52 5.04 5544 35 41 46 51 54 58 61 63 66 68 70 72 74 76 77 79 80
51 5.25 5775 37 43 48 53 57 60 63 66 68 71 73 75 77 78 80 82 83
50 5.47 6017 38 45 50 55 59 62 65 68 71 73 75 77 79 81 83 84 86
49 5.71 6281 40 47 52 57 61 65 68 71 73 76 78 80 82 84 86 87 89
48 5.97 6567 42 49 55 59 64 67 70 73 75 79 81 83 85 87 89 90 92
47 6.24 6864 44 51 57 62 66 70 73 76 79 81 84 86 88 90 92 93 95
46 6.52 7172 48 54 59 64 69 73 76 79 82 84 87 89 91 93 95 97 98
45 6.83 7513 49 56 62 67 72 75 79 82 86 87 90 92 94 96 98 100 102
44 7.16 7876 51 59 65 70 74 78 82 85 88 91 93 96 98 100 102 104 105
43 7.51 8261 53 61 67 73 77 81 85 88 91 94 97 99 101 103 105 107 109
42 7.88 8668 56 64 70 76 81 85 88 92 95 96 100 103 105 107 109 111 113
41 8.29 9119 59 67 73 79 84 88 92 95 99 101 104 107 109 111 113 115 117
40 8.72 9592 61 70 77 82 87 92 96 99 102 105 108 111 113 115 117 119 121
39 9.19 10109 64 73 80 86 91 95 99 103 106 109 112 115 117 120 122 124 126
38 9.70 10670 68 76 84 90 95 99 104 107 111 114 117 119 122 124 127 129 131
37 10.25 11275 71 80 87 93 99 104 108 112 115 118 121 124 127 129 132 134 136
36 10.84 11924 74 84 91 98 103 108 112 116 120 123 126 129 132 134 137 139 141
35 11.48 12628 78 87 95 102 108 113 117 121 125 128 131 134 137 140 142 144 147

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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