Bearing Capacity ChartDelmag Diesel Pile Hammers

Delmag D80-23 Single Acting Diesel Pile Hammer

Bearing Capacity (kips) 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
53	5.20	91520	589	640	682	717	748	775	799	821	841	860	877	893	908	921	935	947	959
52	5.40	95040	602	654	697	733	764	792	817	839	859	878	895	912	927	941	954	967	979
51	5.60	98560	615	668	712	748	780	808	833	856	877	896	914	930	946	960	974	987	999
50	5.80	402080	627	682	726	763	796	824	850	873	894	914	932	948	964	979	993	1006	1018
49	6.00	105600	640	695	740	778	811	840	866	890	911	931	949	966	982	997	1011	1025	1037
48	6.30	110880	658	715	761	800	834	863	890	914	936	956	975	993	1009	1024	1039	1052	1065
47	6.60	116160	676	734	781	821	856	886	913	938	961	981	1000	1018	1035	1051	1066	1080	1093
46	6.80	119680	688	746	794	835	870	901	929	954	977	998	1017	1035	1052	1068	1083	1097	1111
45	7.20	126720	710	771	820	862	898	930	958	984	1008	1029	1049	1068	1086	1102	1117	1132	1146
44	7.50	132000	727	789	839	882	919	951	980	1007	1031	1053	1073	1092	1110	1127	1143	1157	1172
43	7.80	137280	744	806	858	901	939	972	1002	1028	1053	1075	1096	1116	1134	1151	1167	1182	1197
42	8.20	144320	765	829	882	927	965	999	1030	1057	1082	1105	1127	1147	1165	1183	1199	1215	1230
41	8.60	151360	786	852	9906	951	991	1026	1057	1085	1111	1134	1156	1177	1196	1214	1231	1247	1262
40	9.10	160160	811	879	935	981	1022	1058	1090	1119	1145	1170	1192	1213	1233	1251	1269	1285	1301
39	9.50	167200	831	900	957	1005	1046	1083	1116	1145	1172	1197	1220	1242	1262	1281	1298	1315	1331
38	10.00	176000	855	926	984	1034	1076	1114	1147	1178	1205	1231	1255	1277	1297	1317	1335	1352	1368
37	10.60	1865680	883	957	1017	1067	1111	1150	1184	1215	1244	1270	1295	1317	1338	1358	1377	1395	1412
36	11.20	197120	911	986	1048	1100	1145	1184	1220	1252	1282	1309	1334	1357	1379	1399	1418	1437	1454
35	11.80	207680	938	1015	1078	1131	1178	1218	1255	1288	1318	1346	1371	1395	1418	1439	1459	1477	1495
34	12.50	220000	968	1047	1112	1167	1215	1257	1295	1329	1360	1388	1414	1439	1462	1484	1504	1523	1542

Calculates bearing capacities based upon FHWA modified Gates formula:
Ru = [ 1.75 √E ( log 10N ) - 100 ]
where
Ru = Driven bearing capacity of the pile in kips
N = Number of hammer blows per inch
E = Energy developed by the hammer per blow in ft-lbs