Giving you the Edge in Business

The West Side Scribner Log Rule is Table Based Rule

The rule basically stipulates the use of the original Scribner table where the maximum scaling length is set to be 40', instead of the 20' used for the Eastside rule.
And, unlike the NWLRAG, logs that are longer than 40' (according to the USFS) must be measured at both ends and the actual table used to calculate the volume for each segment.

Of interest is that the USFS 1940 Log Scaling Handbook called for a maximum scaling length of 16 feet (not 20 feet). this jibes with the original Scribner rule that called for a maximum length of 15 feet. Also, the Handbook specifically identified a maximum length of 40 feet for timber west of the Cascades.

The following is an except from the Handbook:

"In scaling national-forest timber, logs over 16 feet in length will be scaled as two or more logs, as far as practicable in lengths of not less than 12 feet, except in the following instances:
(1) On the national forests in Alaska and west of the summit of the Cascade Mountains in Washington and Oregon the scaling lengths will be determined in accord¬ ance with the instructions given below.
(2) On Black Hills National Forest 17- and 18-foot mining timbers will be scaled as one log. (3) On national forests in regions where it is the practice to manufacture railroad ties 8 1/2 feet long, logs of species cut primarily for ties will be scaled as one log if 17 feet long.
Logs exceeding the maximum scaling length will be divided into two or more logs, all as nearly of the same length as is practicable. If a log must be divided into unequal lengths, the butt log should be the longer. Inexperienced men should determine the diameters of the logs into which the long log will be divided, with the exception of the top log, by measuring the diameter of the long log at both ends and assuming an even taper; but this is not applicable where the log to be divided is a butt log, since taper is not uniform near the butt. Taper tables applicable to the species and region are valuable for training and checking scalers."
For example, a 44-foot log 16 inches in diameter would be scaled as—
One 14-foot log with a diameter of 16 inches.
One 14-foot log with a diameter of 17 inches.
One 16-foot log with a diameter of 19 inches.
"Judgement which permits accurate determination of taper without measurement comes only as a result of familiarity with the form of different species in the given region. Especial consideration will always have to be given to the log of abnormal form, since the object is to scale on the basis of the actual taper. Tables 10 and 11 in the appendix are to be used simply as a guide, the allowance for taper being varied to con¬ form to the actual taper."
"On the national forests in Alaska, and west of the summit of the Cascade Mountains in Washington and Oregon, logs up to and including 40 feet in length will be scaled as one log; lengths from 40 to 80 feet, inclusive, will be scaled as two logs as nearly equal in length as possible in even feet. Greater lengths than 80 feet will be scaled as three logs, the division being made as nearly as possible in even feet and the diameter being increased according to the taper of the log. This departure from the usual method does not apply to sales involving chiefly timber which will be marketed in competition with timber of the same species from sales outside this region, such as sales of ponderosa pine in southwestern Oregon. When logs are scaled as two or more logs, the scale allowed for the separate lengths will be added and the total recorded as one log."


Here is the table (Not Decimal C), published by Henry Salon Graves in 1903 (The Woodman's Handbook)

Len/Diam	6"	7"	8"	9"	10"	11"	12"	13"	14"	15"	16"
8'							39	49	58	71	79
9'							44	54	64	80	89
10'							49	61	72	89	99
11'							54	67	79	98	109
12'	14	18	23	30	38	48	59	73	86	107	119
13'	15	20	26	32	41	52	64	79	93	116	129
14'	16	22	28	35	45	56	69	85	100	125	139
15'			30	38	49	60	74	91	107	134	149
16'	18	24	32	42	54	64	79	97	114	142	159
17'			34	45	58	68	84	103	122	154	168
18'			36	48	62	72	88	109	129	160	178
19'			38	51	66	76	93	116	136	169	188
20'			40	54	70	80	98	122	143	178	198
21'							103	128	150	187	208
22'							108	134	157	196	218
23'							113	140	164	205	228
24'							118	146	172	214	238
25'							123	152	179	223	248
26'							128	158	186	232	258
26'							133	164	193	241	268
28'							138	170	200	250	278
29'							143	176	207	259	288
30'							148	182	214	268	298
31'							153	188	221	278	308
32'							158	194	228	284	318
33'							163	200	236	293	329
34'							168	206	244	302	338
35'							173	212	251	314	346
36'							178	218	258	320	356

Len/Diam	17"	18"	19"	20"	21"	22"	23"	24"	25"	26'	27"	28"	29"	30"	31"	32"
8'	93	106	120	140	152	167	188	202	230	250	274	290	305	329	355	368
9'	104	120	135	157	171	188	212	227	258	282	308	327	343	369	395	414
10'	116	133	150	175	190	209	235	252	287	313	342	363	381	411	444	460
11'	127	147	165	192	209	230	259	278	315	344	377	400	419	451	488	506
12'	139	160	180	210	228	251	283	303	344	375	411	436	457	493	532	552
13'	150	173	195	227	247	272	306	328	373	408	445	473	495	534	576	598
14'	162	187	210	245	268	292	330	353	401	439	479	509	533	575	622	644
15'	173	200	225	262	285	313	353	379	430	469	514	545	571	616	666	690
16'	185	213	240	280	304	334	377	404	459	500	548	582	609	657	710	736
17'	196	227	255	297	323	355	400	429	487	531	582	618	647	698	755	782
18'	208	240	270	315	342	376	424	454	516	562	616	654	685	739	799	828
19'	219	253	285	332	361	397	447	480	545	594	650	692	723	780	843	874
20'	232	267	300	350	380	418	470	505	573	625	684	728	761	821	888	920
21'	243	280	315	368	399	439	495	530	602	656	719	764	800	863	932	966
22'	255	293	330	385	418	460	518	555	631	688	753	800	838	904	976	1012
23'	266	307	345	403	437	480	542	571	659	719	787	837	876	945	1021	1058
24'	278	320	360	420	456	501	566	606	688	750	821	873	914	986	1065	1104
25'	289	333	375	438	475	522	589	631	717	781	856	910	952	1027	1109	1150
26'	300	346	390	454	494	544	612	656	746	816	890	946	990	1068	1154	1196
26'	312	360	405	472	513	564	636	681	774	847	924	982	1025	1109	1198	1242
28'	324	374	420	490	532	584	660	706	806	878	958	1018	1066	1150	1244	1288
29'	335	387	435	507	551	605	683	732	831	908	993	1054	1104	1191	1286	1334
30'	346	400	450	542	570	626	706	758	860	936	1028	1090	1142	1232	1332	1380
31'	368	413	465	542	589	647	730	783	889	969	1062	1127	1180	1273	1376	1426
32'	370	426	480	560	608	668	754	808	918	1000	1096	1164	1218	1314	1420	1472
33'	381	440	495	577	627	689	777	833	946	1031	1130	1200	1256	1355	1465	1518
34'	392	454	510	594	646	710	800	858	974	1061	1164	1236	1294	1396	1510	1564
35'	404	467	525	612	665	731	824	883	1003	1093	1198	1272	1332	1437	1554	1610
36'	416	480	540	630	684	752	848	908	1146	1124	1232	1308	1370	1478	1598	1656

Len/Diam	33"	34"	35"	36"	37"	38"	39"	40"	41"	42"	43"	44"
8'	392	400	438	462	515	535	560	602	636	672	698	740
9'	441	450	493	519	579	601	630	677	716	756	786	833
10'	490	500	547	577	644	669	700	752	795	840	872	925
11'	539	550	602	634	708	734	770	828	874	924	959	1017
12'	588	600	657	692	772	801	840	903	954	1007	1046	1110
13'	637	650	712	750	836	868	910	978	1033	1091	1135	1203
14'	686	700	766	807	901	934	980	1053	1113	1175	1222	1295
15'	735	750	821	865	965	1001	1050	1129	1192	1259	1309	1388
16'	784	800	876	923	1029	1068	1120	1204	1272	1343	1396	1480
17'	833	850	931	980	1094	1134	1190	1279	1351	1427	1484	1573
18'	882	900	985	1038	1158	1201	1260	1354	1431	1511	1571	1665
19'	931	950	1040	1096	1222	1268	1330	1430	1510	1595	1658	1758
20'	980	1000	1095	1152	1287	1335	1400	1505	1590	1679	1745	1850
21'	1029	1050	1150	1210	1252
22'	1078	1100	1204	1268	1317
23'	1127	1150	1259	1322	1382
24'	1176	1200	1314	1380	1558
25'	1225	1250	1369	1438	1623
26'	1274	1300	1423	1499	1688
26'	1323	1350	1478	1557	1753
28'	1372	1400	1532	1614	1818
29'	1421	1450	1587	1672	1883
30'	1470	1500	1642	1730	1948
31'	1519	1550	1697	1788	2013
32'	1568	1600	1752	1846	2076
33'	1617	1650	1807	1908	2141
34'	1666	1700	1862	1960	2206
35'	1715	1750	1916	2018	2271
36'	1764	1800	1971	2076	2336

Source: Henry Salon Gravses, The Woodman's Handbook, 1903 Here is the PDF

Here is the Decimal C rendition of the table, published by the US Forest Service in 1940.

Len/Diam	6"	7"	8"	9"	10"	11"	12"	13"	14"	15"	16"	17"
8'	0.5	1	1	2	3	3	4	5	6	7	8	9
9'	0.5	1	1	2	3	3	4	5	6	8	9	10
10'	1	1	2	3	3	4	5	6	7	9	10	12
11'	1	2	2	3	3	4	5	7	8	10	11	13
12'	1	2	2	3	3	4	6	7	9	11	12	14
13'	1	2	2	3	4	5	6	8	9	12	13	15
14'	1	2	2	3	4	5	7	8	10	12	14	16
15'	1	2	2	3	5	6	7	9	11	13	15	17
16'	2	3	3	4	6	7	8	10	11	14	16	18
17'	2	3	3	4	6	7	8	10	12	15	17	20
18'	2	3	3	4	6	8	9	11	13	16	18	21
20'	2	3	3	4	7	8	10	12	14	18	20	23
22'	3	4	4	5	8	9	11	13	16	20	22	25
24'	3	4	4	6	9	10	12	15	17	21	24	28
26'	3	4	5	6	9	11	13	16	18	23	26	30
28'	4	5	6	7	10	12	14	17	20	25	28	32
30'	4	5	6	8	11	13	15	18	21	27	30	35
32'	5	6	7	9	12	14	16	19	23	28	32	37
34'	5	6	7	10	13	15	17	21	24	30	34	39
36'	6	6	8	10	14	16	18	22	26	32	36	42
38'	6	6	8	11	14	17	19	23	27	34	38	44
40'	7	7	9	12	15	18	20	24	29	36	40	45

Len/Diam	18"	19"	20"	21"	22"	23"	24"	25"	26'	27"	28"	29"
8'	11	12	14	15	17	19	21	23	25	27	29	31
9'	12	13	16	17	19	21	23	26	28	31	33	35
10'	13	15	17	19	21	23	25	29	31	34	36	38
11'	15	16	19	21	23	26	28	31	34	38	40	42
12'	16	18	21	23	25	28	30	34	37	41	44	46
13'	17	19	23	25	27	31	33	37	41	44	47	49
14'	19	21	24	27	29	33	35	40	44	48	51	53
15'	20	22	26	29	31	35	38	43	47	51	54	57
16'	21	24	28	30	33	38	40	46	50	55	58	61
17'	23	26	30	32	35	40	43	49	53	58	62	65
18'	24	27	31	34	38	42	45	52	56	62	65	68
20'	27	30	35	38	42	47	50	57	62	68	73	76
22'	29	33	38	42	46	52	55	63	69	75	80	84
24'	32	36	42	46	50	57	61	69	75	82	87	91
26'	35	39	45	49	54	61	66	75	82	89	95	99
28'	37	42	49	53	58	66	71	80	88	96	102	107
30'	40	45	52	57	63	71	76	86	94	103	109	114
32'	43	48	56	61	67	75	81	92	100	110	116	122
34'	45	51	60	65	71	80	86	98	106	116	124	129
36'	48	54	63	68	75	85	91	103	112	123	131	137
38'	51	57	66	72	79	89	96	109	119	130	138	145
40'	53	60	70	76	83	94	101	115	125	137	146	152

Len/Diam	30"	31"	32"	33"	34"	35"	36"	37"	38"	39"	40"	41"
8'	33	36	37	39	40	44	46	51	54	56	60	64
9'	37	40	41	44	45	49	52	58	60	63	68	72
10'	41	44	46	49	50	55	58	64	67	70	75	79
11'	45	49	51	54	55	60	63	71	73	77	83	87
12'	49	53	55	59	60	66	69	77	80	84	90	95
13'	53	58	60	64	65	71	75	84	87	91	98	103
14'	57	62	64	69	70	77	81	90	93	98	105	111
15'	62	67	69	73	75	82	86	96	100	105	113	119
16'	66	71	74	78	80	88	92	103	107	112	120	127
17'	70	75	78	83	85	93	98	109	113	119	128	135
18'	74	80	83	88	90	98	104	116	120	126	136	143
20'	82	89	92	98	100	109	115	129	133	140	151	159
22'	90	98	101	108	110	120	127	142	147	154	166	175
24'	99	106	110	118	120	131	138	154	160	168	181	191
26'	107	115	120	127	130	142	150	167	174	182	196	207
28'	115	124	129	137	140	153	161	180	187	196	211	223
30'	123	133	138	147	150	164	173	193	200	210	226	238
32'	131	142	147	157	160	175	185	206	214	224	241	254
34'	140	151	156	167	170	186	196	218	226	238	256	270
36'	148	160	166	176	180	197	208	232	240	252	270	286
38'	156	169	175	186	190	208	219	244	254	266	286	302
40'	164	178	184	196	200	219	230	258	266	280	300	318

Len/Diam	42"	43"	44"	45"	46"	47"	48"	49"	50"	51"	52"	53"
8'	67	70	74	76	79	83	86	90	94	97	101	105
9'	76	79	83	85	89	93	97	101	105	110	114	118
10'	84	87	93	95	99	104	108	112	117	122	127	132
11'	92	96	102	104	109	114	119	124	129	134	139	145
12'	101	105	111	114	119	124	130	135	140	146	152	158
13'	109	113	120	123	129	134	140	146	152	158	165	171
14'	117	122	129	133	139	145	151	157	164	170	177	184
15'	126	131	139	143	149	155	162	168	175	183	190	197
16'	134	140	148	152	159	166	173	180	187	195	202	210
17'	143	148	157	161	169	176	184	191	199	207	215	224
18'	151	157	166	171	178	186	194	202	211	219	228	237
20'	168	174	185	190	198	207	216	225	234	243	253	263
22'	185	192	204	209	218	228	238	247	257	268	278	289
24'	201	209	222	228	238	248	260	270	281	292	304	316
26'	218	227	241	247	258	269	281	292	304	315	329	341
28'	235	244	259	265	278	290	302	314	328	341	354	368
30'	252	262	278	286	297	310	324	337	351	365	380	395
32'	269	279	296	304	317	331	346	359	374	389	405	421
34'	286	296	314	322	338	352	368	382	398	414	430	447
36'	302	314	332	342	356	372	388	404	421	438	455	473
38'	318	332	352	360	376	394	410	427	445	462	481	500
40'	336	348	370	380	396	414	432	449	468	487	506	526

Len/Diam	54"	55"	56"	57"	58"	59"	60"	61"	62"	63"	64"	65"
8'	109	113	118	122	126	131	135	140	145	149	154	159
9'	123	127	132	137	142	147	152	158	163	168	174	179
10'	137	142	147	152	158	163	169	175	181	187	193	199
11'	150	156	162	167	174	180	186	193	199	205	213	219
12'	164	170	176	183	189	196	203	210	217	224	232	239
13'	177	184	191	198	205	212	220	228	235	243	251	259
14'	191	198	206	213	221	229	237	245	253	261	270	279
15'	205	212	220	228	237	245	253	263	271	280	290	299
16'	218	227	235	244	252	261	270	280	289	299	309	319
17'	232	241	250	259	268	278	287	298	307	317	329	339
18'	246	255	264	274	284	294	304	315	325	336	348	358
20'	273	283	294	304	315	327	338	350	362	373	387	398
22'	300	312	323	335	347	359	372	385	398	411	425	438
24'	328	340	353	365	379	392	406	420	434	448	464	478
26'	355	368	382	396	410	425	439	455	470	485	503	518
28'	382	397	411	426	442	457	473	490	506	523	541	558
30'	410	425	441	457	473	490	507	525	542	560	580	597
32'	437	453	470	487	505	523	541	560	579	597	619	637
34'	464	481	500	518	536	555	575	594	614	635	656	677
36'	491	510	529	548	568	588	608	629	650	672	694	717
38'	519	538	558	578	599	620	642	664	687	710	733	757
40'	546	566	588	609	631	653	676	699	723	746	772	796

Len/Diam	66"	67"	68"	69"	70"	71"	72"	73"	74"	75"	76"	77"
8'	164	170	175	180	186	192	197	203	209	215	221	228
9'	185	181	197	203	209	215	222	229	236	242	249	256
10'	206	212	219	226	232	240	247	254	261	269	277	285
11'	226	233	240	248	256	263	271	280	288	296	304	313
12'	247	254	262	271	279	287	296	305	314	323	332	341
13'	268	275	284	294	302	311	321	330	340	350	360	369
14'	288	297	306	316	325	335	345	356	366	377	387	398
15'	309	318	328	330	349	359	370	381	393	404	415	426
16'	329	339	350	361	372	383	395	406	418	430	443	455
17'	350	360	371	384	395	407	419	432	445	458	470	483
18'	370	381	393	406	419	430	444	457	471	484	498	511
20'	412	423	437	452	465	478	493	518	523	538	553	568
22'	453	466	480	497	512	526	543	559	576	592	608	625
24'	494	508	524	542	558	574	592	610	628	646	664	682
26'	535	550	568	587	605	622	641	661	680	700	719	739
28'	576	593	611	632	651	670	691	712	733	754	775	795
30'	617	635	655	677	698	717	740	762	785	807	830	852
32'	659	677	699	723	744	765	789	813	837	861	885	909
34'	609	721	744	767	790	814	838	864	889	915	941	967
36'	740	763	787	812	837	862	888	914	941	968	996	1024
38'	781	806	831	857	883	910	937	965	998	1022	1051	1081
40'	822	848	875	902	930	958	986	1016	1046	1076	1107	1138

Len/Diam	78"	79"	80"	81"	82"	83"	84"	85"	86"	97"	88"	89"
8'	234	240	247	254	261	268	275	281	287	295	301	308
9'	263	271	278	286	298	301	309	316	323	332	339	347
10'	293	301	309	317	326	335	343	351	359	368	377	385
11'	322	331	340	349	358	368	378	386	395	405	414	424
12'	351	361	371	381	391	401	412	421	431	442	452	462
13'	380	391	402	413	424	434	446	456	467	479	490	501
14'	410	421	432	444	456	468	481	491	503	516	527	539
15'	439	451	464	476	480	501	515	526	539	553	565	578
16'	468	481	494	508	521	535	549	561	575	589	603	616
17'	497	511	526	540	554	568	584	596	611	626	640	655
18'	527	541	556	572	586	601	618	631	646	668	678	693
20'	585	602	618	635	652	668	687	702	718	737	758	770
22'	644	662	680	699	717	735	755	772	790	810	829	847
24'	702	722	742	762	782	802	824	842	862	884	904	924
26'	761	782	804	826	847	869	893	912	934	958	979	1001
28'	819	842	866	889	912	936	961	982	1006	1031	1055	1078
30'	878	902	927	953	977	1002	1030	1052	1077	1105	1130	1155
32'	936	963	989	1016	1043	1069	1099	1123	114	1179	1205	1232
34'	994	1022	1050	1078	1108	1137	1167	1192	1222	1252	1280	1310
36'	1053	1082	1112	1142	1173	1202	1236	1262	1292	1326	1356	1386
38'	1112	1142	1174	1205	1238	1271	1305	1334	1364	1400	1432	1464
40'	1170	1202	1236	1269	1303	1338	1373	1404	1436	1474	1506	1540

Len/Diam	90"	91"	92"	93"	94"	95"	96"	97"	98"	99"	100"	101"
8'	315	322	329	335	343	350	357	364	371	379	386	393
9'	354	362	370	377	386	394	402	410	418	426	434	443
10'	393	402	411	419	428	437	446	455	464	473	482	492
11'	433	443	452	461	471	481	491	501	511	521	531	541
12'	472	483	493	503	514	525	536	546	557	568	579	590
13'	511	523	534	545	557	569	581	592	603	615	627	639
14'	551	563	575	587	600	612	625	637	650	663	675	688
15'	590	604	616	629	643	656	670	683	696	710	724	738
16'	629	644	657	671	685	700	715	728	743	757	772	787
17'	669	684	698	713	728	744	759	774	789	805	820	836
18'	708	725	740	755	771	788	804	819	836	852	869	885
20'	787	805	822	838	857	875	893	910	928	947	965	983
22'	865	886	904	922	942	963	983	1001	1021	1041	1062	1082
24'	944	966	986	1006	1028	1050	1072	1092	1114	1136	1158	1180
26'	1023	1047	1068	1090	1114	1138	1161	1183	1207	1231	1255	1278
28'	1101	1127	1150	1174	1199	1225	1251	1274	1300	1325	1351	1377
30'	1180	1208	1233	1258	1285	1313	1340	1365	1392	1420	1448	1475
32'	1259	1288	1315	1341	1371	1400	1429	1456	1485	1515	1544	1578
34'	1338	1368	1396	1426	1456	1488	1518	1548	1578	1610	1640	1672
36'	1416	1450	1480	1510	1542	1576	1608	1638	1672	1704	1738	1770
38'	1494	1530	1562	1592	1628	1662	1698	1730	1764	1798	1834	1868
40'	1574	1610	1644	1676	1714	1750	1786	1820	1856	1894	1930	1966

Len/Diam	102"	102"	104"	105"	106"	107"	108"	109"	110"	111"	112"	113"
8'	404	409	417	425	433	442	450	459	467	475	483	492
9'	452	461	470	479	488	497	506	516	525	535	544	554
10'	502	512	522	532	542	553	563	573	583	594	604	615
11'	552	563	574	585	596	608	619	631	642	654	665	677
12'	602	614	625	638	650	663	675	688	700	713	725	738
13'	652	665	678	694	704	718	731	745	758	772	785	800
14'	702	715	730	744	758	773	788	803	817	832	846	851
15'	753	768	783	798	813	829	844	860	875	891	906	923
16'	808	819	835	851	867	884	900	917	933	951	957	984
17'	853	870	887	904	921	939	956	957	992	1010	1027	1046
18'	903	921	939	957	975	995	1013	1032	1050	1070	1088	1107
20'	1003	1021	1043	1063	1083	1105	1125	1147	1167	1188	1208	1230
22'	1104	1126	1148	1170	1192	1216	1238	1261	1283	1307	1329	1353
24'	1204	1228	1232	1276	1300	1325	1350	1375	1400	1426	1450	1476
26'	1304	1330	1356	1382	1408	1437	1483	1491	1517	1545	1573	1599
28'	1405	1433	1461	1489	1517	1547	1575	1605	1633	1664	1692	1722
30'	1505	1535	1565	1595	1625	1658	1688	1720	1750	1783	1813	1845
32'	1605	1637	1669	1701	1733	1768	1800	1835	1867	1901	1933	1968
34'	1706	1740	1774	1808	1842	1878	1912	1950	1984	2020	2054	2092
36'	1805	1842	1878	1914	1950	1990	2025	2064	2100	2140	2176	2214
38'	1906	1944	1982	2020	2058	2100	2138	2178	2216	2258	2296	2338
40'	2006	2046	2086	2126	2166	2210	2250	2294	2334	2376	2416	2460

Len/Diam	114"	115"	116"	117"	118"	119"	120"
8'	501	509	519	528	537	547	556
9'	563	573	584	594	605	615	626
10'	626	627	648	660	672	683	695
11'	688	700	713	726	739	752	765
12'	751	764	778	792	806	820	834
13'	814	828	843	858	873	888	904
14'	876	891	908	924	940	957	973
15'	939	955	973	990	1008	1025	1043
16'	1001	1019	1037	1056	1075	1093	1112
17'	1064	1082	1102	1122	1142	1162	1182
18'	1127	1146	1167	1188	1209	1230	1251
20'	1252	1273	1297	1320	1343	1357	1390
22'	1377	1401	1426	1452	1478	1503	1529
24'	1502	1528	1556	1584	1612	1640	1668
26'	1627	1635	1686	1716	1746	1777	1807
28'	1752	1783	1815	1848	1881	1913	1946
30'	1878	1910	1945	1980	2015	2050	2085
32'	2003	2037	2075	2112	2149	2187	2224
34'	2128	2164	2204	2244	2284	2324	2364
36'	2254	2292	2334	2376	2418	2460	2502
38'	2378	2420	2464	2508	2552	2596	2642
40'	2504	2546	2594	2640	2686	2734	2780

Source: US Forest Service, National Forest Scaling Handbook, 1940 Here is the PDF