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Bearing Capacity Chart -- Delmag Diesel Pile Hammers

Delmag D12-32 & D12-42 Single Acting Diesel Pile Hammers

Blows	Piston	Hammer	Bearing Capacity (tons) for a Pile Set (blows/in) of:
Per Min.	Stroke (ft)	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