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Bearing Capacity Chart - Delmag Diesel Pile Hammers

Delmag D62-22 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	63566	237	258	276	291	303	315	325	334	342	350	357	364	370	376	381	386	391
53	4.84	66163	243	265	282	298	311	322	332	342	350	358	365	372	378	384	390	395	400
52	5.04	68897	249	271	289	305	318	330	340	350	358	366	374	381	387	393	399	404	409
51	5.25	71768	255	278	296	312	326	338	348	358	367	375	383	390	396	402	408	414	419
50	5.47	74775	261	284	303	319	333	346	357	366	375	384	391	399	405	412	418	423	429
49	5.71	78056	268	292	311	327	342	354	365	375	385	393	401	408	415	422	428	433	439
48	5.97	81610	275	299	319	336	350	363	375	385	394	403	411	419	426	432	438	444	450
47	6.24	85301	282	307	327	345	359	372	384	395	404	413	422	429	436	443	449	455	461
46	6.52	89128	290	315	336	353	368	382	394	405	414	424	432	440	447	454	460	467	472
45	6.83	93366	298	324	345	363	378	392	404	415	425	435	443	451	459	466	472	479	485
44	7.16	97877	306	333	354	373	389	403	415	426	437	446	455	463	471	478	485	491	497
43	7.51	102662	315	342	364	383	399	413	426	438	449	458	467	476	484	491	498	504	511
42	7.88	107720	324	351	374	393	410	425	438	450	461	471	480	488	497	504	511	518	524
41	8.29	113324	333	362	385	405	422	437	450	463	474	484	493	502	511	518	526	533	539
40	8.72	119202	343	372	396	416	434	449	463	476	487	498	507	516	525	533	540	547	554
39	9.19	125627	353	384	408	429	447	463	477	490	501	512	522	532	540	548	556	563	570
38	9.70	132599	365	395	421	442	460	477	491	505	517	528	538	547	556	565	573	580	587
37	10.25	140118	376	408	434	456	475	491	506	520	532	544	554	564	573	582	590	598	605
36	10.84	148183	388	421	448	470	490	507	522	536	549	561	571	582	591	600	608	616	624
35	11.48	156932	401	435	462	485	505	523	539	553	566	578	590	600	610	619	627	636	643

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