Bearing Capacity Chart - Delmag Diesel Pile Hammers

Delmag D25-32 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 25635 132 146 157 166 174 182 188 194 199 204 208 213 217 220 224 227 230
53 4.84 26683 136 150 161 171 179 186 193 199 204 209 214 218 222 226 229 233 236
52 5.04 27786 140 154 165 175 184 191 198 204 209 214 219 223 228 231 235 238 242
51 5.25 28943 144 158 170 180 188 196 203 209 215 220 225 229 233 237 241 244 248
50 5.47 30156 148 162 174 185 193 201 208 214 220 225 230 235 239 243 247 251 254
49 5.71 31479 152 167 179 190 199 207 214 220 226 231 236 241 245 250 253 257 260
48 5.97 32913 157 172 184 195 204 212 220 226 232 238 243 248 252 256 260 264 267
47 6.24 34401 161 177 190 201 210 218 226 232 239 244 249 254 259 263 267 271 275
46 6.52 35945 166 182 195 206 216 224 232 239 245 251 256 261 266 270 274 278 282
45 6.83 37654 171 187 201 212 222 231 238 245 252 258 263 268 273 278 282 286 290
44 7.16 39473 176 193 207 218 229 237 245 253 259 265 271 276 281 285 290 294 298
43 7.51 41403 182 199 213 225 235 244 252 260 267 273 279 284 289 294 298 302 306
42 7.88 43442 187 205 219 232 242 252 260 267 274 281 286 292 297 302 306 311 315
41 8.29 45703 193 211 226 239 250 259 268 276 283 289 295 301 306 311 316 320 324
40 8.72 48073 200 218 233 246 257 267 276 284 291 298 304 310 315 320 325 329 334
39 9.19 50664 206 225 241 254 266 276 285 293 300 307 313 319 325 330 335 340 344
38 9.70 53476 213 233 249 262 274 285 294 302 310 317 323 329 335 340 345 350 355
37 10.25 56508 221 241 257 271 283 294 303 312 320 327 334 340 346 351 356 361 366
36 10.84 59761 228 249 266 280 293 304 313 322 330 338 345 351 357 363 368 373 378
35 11.48 63289 236 258 275 290 303 314 324 333 341 349 356 363 369 375 380 385 390

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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