Bearing Capacity Chart -- Delmag Diesel Pile Hammers

Delmag D12-32 & D12-42 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 13113 80 90 98 105 111 116 120 124 128 132 135 138 141 143 146 148 150
53 4.84 13649 83 93 101 108 114 119 124 128 132 135 139 142 145 147 150 152 154
52 5.04 14213 86 96 104 111 117 122 127 132 135 139 142 146 149 151 154 156 159
51 5.25 14805 89 99 107 114 121 126 131 135 139 143 146 150 153 155 158 161 163
50 5.47 15425 91 102 111 118 124 130 135 139 143 147 151 154 157 160 162 165 167
49 5.71 16102 94 105 114 121 128 134 139 143 147 151 155 158 161 164 167 170 172
48 5.97 16835 98 109 118 125 132 138 143 148 152 156 159 163 166 169 172 175 177
47 6.24 17597 101 112 121 129 136 142 147 152 156 160 164 168 171 174 177 180 182
46 6.52 18386 104 116 125 133 140 146 152 156 161 165 169 172 176 179 182 185 187
45 6.83 19261 108 120 129 138 145 151 156 161 166 170 174 178 181 184 187 190 193
44 7.16 20191 112 124 134 142 149 156 161 166 171 175 179 183 187 190 193 196 199
43 7.51 21178 116 128 138 147 154 161 166 172 176 181 185 189 192 196 199 202 205
42 7.88 22222 120 132 143 151 159 166 172 177 182 186 191 195 198 202 205 208 211
41 8.29 23378 124 137 148 157 164 171 177 183 188 193 197 201 205 208 211 215 218
40 8.72 24590 129 142 153 162 170 177 183 189 194 199 203 207 211 215 218 221 224
39 9.19 25916 133 147 158 167 176 183 189 195 200 205 210 214 218 222 225 229 232
38 9.70 27354 138 152 164 173 182 189 196 202 207 212 217 221 225 229 233 236 239
37 10.25 28905 144 158 170 180 188 196 203 209 215 220 224 229 233 237 241 244 248
36 10.84 30569 149 164 176 186 195 203 210 216 222 227 232 237 241 245 249 253 256
35 11.48 32374 155 170 183 193 202 210 217 224 230 235 240 245 250 254 258 261 265

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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