Bearing Capacity ChartDelmag Diesel Pile Hammers

Delmag D25-32 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	28652	285	314	338	357	375	390	403	416	427	437	447	455	464	472	479	486	492
52	5.40	29754	293	322	346	366	384	399	413	425	437	447	457	466	474	482	490	497	504
51	5.60	30856	300	330	354	375	392	408	422	435	447	457	467	476	485	493	501	508	515
50	5.80	31958	307	337	362	383	401	417	432	444	456	467	477	487	495	504	511	519	526
49	6.00	33060	314	345	370	391	410	426	441	454	466	477	487	497	506	514	522	529	536
48	6.30	34713	324	356	382	403	422	439	454	467	480	491	502	511	521	529	537	545	552
47	6.60	36366	334	367	393	415	435	452	467	481	493	505	516	526	535	544	552	560	567
46	6.80	37468	341	374	400	423	443	460	476	490	502	514	525	535	545	554	562	570	577
45	7.20	39672	353	387	415	438	458	476	492	507	520	532	543	554	563	573	581	589	597
44	7.50	41325	363	397	425	449	470	488	504	519	533	545	556	567	577	586	595	604	611
43	7.80	42978	372	407	436	460	481	500	516	531	545	558	569	580	590	600	609	618	626
42	8.20	45182	384	420	449	474	496	515	532	547	561	574	586	597	608	618	627	636	644
41	8.60	47386	396	433	463	488	510	530	547	563	577	591	603	614	625	635	644	653	662
40	9.10	50141	410	448	479	505	528	548	566	582	597	610	623	635	646	656	666	675	684
39	9.50	52345	421	460	491	518	541	562	580	597	612	626	639	651	662	673	682	692	701
38	10.00	55100	434	474	507	534	558	579	598	615	630	645	658	670	682	693	703	712	722
37	10.60	58406	450	491	525	553	578	599	619	636	652	667	680	693	705	716	727	736	746
36	11.20	61712	466	508	542	571	596	619	639	657	673	688	702	715	727	739	750	760	769
35	11.80	65018	481	524	559	589	615	638	658	677	693	709	723	737	749	761	772	783	792
34	12.50	68875	498	542	578	609	636	659	680	699	717	733	747	761	774	786	798	808	819

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