Size, Cubic Volume and Board Foot Volume in Pine Poles

Class and Min Circum.	Length (Feet)	Vol. (Cu.Feet)	Average Volume, Board feet	Average Volume,Board Feet	Min. Circum. and Diam.
and Equiv. Diameter (In.)			Int'l. rule 1/4“	Scribner Rule	Equivalent to 6 ft. of
and Equiv. Diameter (In.)			Int'l. rule 1/4“	Form Class 80	First Log Circum. Diam.
Class 1	25	15.3	86	75	33.5	10.66
27” Circum.	30	20.4	114	125	36.5	11.62
8.59“ Diam.	35	26.2	153	155	39.0	12.41
	40	32.6	182	205	41.0	13.05
	45	39.3	217	245	43.0	13.69
	50	46.6	271	280	45.0	14.32
	55	54.3	306	335	46.5	14.80
	60	62.6	342	385	48.0	15.28
	65	71.1	397	420	49.5	15.76
	70	80.1	441	495	51.0	16.23
	75	89.5	486	535	52.5	16.71

Class 2	25	13.2	74	60	31.5	10.05
25” Circum.	30	17.8	96	105	34.0	10.82
7.96“ Diam.	35	22.8	131	135	36.5	11.62
	40	28.2	158	175	38.5	12.25
	45	34.1	189	210	40.5	12.89
	50	40.4	231	240	42.0	13.37
	55	47.1	261	295	43.5	13.85
	60	54.2	295	325	45.0	14.32
	65	61.6	344	365	46.5	14.80
	70	69.5	381	425	48.0	15.28
	75	77.7	410	500	49.0	15.60

Class 3	25	11.5	63	70	29.5	9.39
23” Circum.	30	15.4	82	85	32.0	10.19
7.32“ Diam.	35	19.7	107	115	34.0	10.82
	40	24.5	135	150	36.0	11.46
	45	29.5	157	180	37.5	11.94
	50	35.0	194	205	39.0	12.41
	55	40.8	222	250	40.5	12.89
	60	47.0	249	280	42.0	13.37
	65	53.4	294	310	43.5	13.85
	70	60.2	328	340	45.0	14.32
	75	67.3	352	380	46.0	14.64

Class 4	25	10.0	53	55	27.5	8.75
21” Circum.	30	13.3	68	70	29.5	9.39
6.68“ Diam.	35	17.1	92	90	31.5	10.03
	40	21.2	112	130	33.5	10.66
	45	25.6	134	145	35.0	11.14
	50	30.4	165	170	36.5	11.62
	55	35.4	189	190	38.0	12.10
	60	40.7	208	215	39.0	12.41
	65	46.4	245	240	40.5	12.89
	70	52.2	277	265	41.5	13.21

Class 5	25	8.6	43	45	25.5	8.12
19” Circum.	30	11.6	55	55	27.5	8.75
6.5“ Diam.	35	14.8	75	75	29.0	9.23
	40	18.4	93	100	31.0	9.87
	45	22.2	107	120	32.5	10.35
	50	26.3	137	140	34.0	10.82

Class 6	20	5.2	24	20	21.0	6.68
17” Circum.	25	7.5	32	35	23.0	7.32
5.41“ Diam.	30	10.0	43	45	25.0	7.96
	35	12.8	62	65	27.0	8.59
	40	15.9	75	85	28.5	9.07
	45	19.3	90	100	30.0	9.55

Class 7	20	4.6	20	15	19.5	6.21
15” Circum.	25	6.4	27	25	21.5	6.84
4.77“ Diam.	30	8.6	36	35	23.5	7.48
	35	11.1	49	55	25.0	7.96

Class 9	20	3.2	17	10	17.5	5.57
15” Circum.	25	4.7	24	20	19.5	6.21
4.77“ Diam.	30	6.4	32	25	20.5	6.53
4.77“ Diam.
Class 10	20	2.8	8	10	14.0	4.46
12” Circum. 3.82“ Diam.	25	4.0	14	15	15.0	4.77

Forest Farmer Manual, March 1975

Service Forester's Handbook

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Size, Cubic Volume and Board Foot Volume in Pine Poles

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