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Bearing Capacity Chart - Delmag Diesel Pile Hammers

Delmag D8-22 Single Acting Diesel Pile Hammer

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	8193	53	61	67	72	77	81	85	88	91	94	96	99	101	103	105	107	108
53	4.84	8528	55	63	69	75	79	84	87	91	94	96	99	102	104	106	108	110	112
52	5.04	8880	57	65	72	77	82	86	90	94	97	99	102	105	107	109	111	113	115
51	5.25	9251	59	68	74	80	85	89	93	96	100	103	105	108	110	112	114	116	118
50	5.47	9638	62	70	77	83	88	92	96	100	103	106	108	111	113	116	118	120	122
49	5.71	10061	64	73	80	86	91	95	99	103	106	109	112	115	117	119	122	124	126
48	5.97	10519	67	75	83	89	94	98	102	106	110	113	116	118	121	123	125	127	129
47	6.24	10995	69	78	86	92	97	102	106	110	113	116	119	122	125	127	129	131	133
46	6.52	11488	72	81	89	95	100	105	109	113	117	120	123	126	128	131	133	135	138
45	6.83	12034	75	84	92	98	104	109	113	117	121	124	127	130	133	135	138	140	142
44	7.16	12616	78	87	95	102	107	112	117	121	125	128	131	134	137	140	142	144	147
43	7.51	13233	81	91	99	105	111	116	121	125	129	132	136	139	142	144	147	149	151
42	7.88	13885	84	94	102	109	115	120	125	129	133	137	140	143	146	149	151	154	156
41	8.29	14607	88	98	106	113	119	125	130	134	138	142	145	148	151	154	157	159	162
40	8.72	15365	91	102	110	117	124	129	134	139	143	147	150	153	156	159	162	165	167
39	9.19	16193	95	106	114	122	128	134	139	144	148	152	155	159	162	165	168	170	173
38	9.70	17091	99	110	119	127	133	139	144	149	153	157	161	164	168	171	174	176	179
37	10.25	18061	103	114	124	132	138	144	150	155	159	163	167	170	174	177	180	183	185
36	10.84	19100	107	119	129	137	144	150	155	160	165	169	173	177	180	183	186	189	192
35	11.48	20228	112	124	134	142	149	156	161	167	171	176	180	183	187	190	193	196	199

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