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Bearing Capacity Chart - Delmag Diesel Pile Hammers

Delmag D80-23 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	82026	276	300	320	337	351	364	376	386	396	404	412	420	427	434	440	446	451
53	4.84	85378	283	307	328	345	360	373	384	395	405	414	422	429	437	443	450	456	461
52	5.04	88906	289	315	335	353	368	381	393	404	414	423	431	439	447	453	460	466	472
51	5.25	92610	296	322	343	361	377	390	402	413	423	433	441	449	457	464	470	477	483
50	5.47	96491	304	330	351	370	385	399	412	423	433	443	451	460	467	474	481	488	494
49	5.71	100724	311	338	360	379	395	409	422	433	444	453	462	471	478	486	493	499	505
48	5.97	105311	319	347	369	388	405	419	432	444	455	465	474	482	490	498	505	512	518
47	6.24	110074	328	356	379	398	415	430	443	455	466	476	486	494	502	510	517	524	531
46	6.52	115013	336	365	388	408	425	441	454	466	478	488	498	506	515	523	530	537	543
45	6.83	120481	345	375	399	419	437	452	466	479	490	501	510	519	528	536	544	551	557
44	7.16	126302	355	385	409	430	448	464	478	491	503	514	524	533	542	550	558	565	572
43	7.51	132476	364	395	420	442	460	477	491	504	516	527	538	547	556	564	572	580	587
42	7.88	139003	374	406	432	454	473	489	504	518	530	541	552	562	571	579	588	595	602
41	8.29	146236	385	418	444	467	486	503	518	532	545	557	567	577	587	596	604	612	619
40	8.72	153821	396	430	457	480	500	517	533	547	560	572	583	593	603	612	621	629	636
39	9.19	162112	408	442	470	494	514	532	549	563	576	589	600	611	620	630	638	647	655
38	9.70	171108	421	456	485	509	530	548	565	580	594	606	618	629	639	648	657	666	674
37	10.25	180810	434	470	500	524	546	565	582	598	612	625	636	648	658	668	677	686	694
36	10.84	191218	448	485	515	541	563	583	600	616	630	644	656	667	678	688	698	707	715
35	11.48	202507	462	500	532	558	581	601	619	635	650	664	677	688	699	710	719	729	738

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