Diameter	Inches per Lineal Inch	Cubic Feet per Lineal Foot
6	28.27	0.196
8	50.27	0.349
10	78.60	0.550
12	113.10	0.785
16	201.07	1.400
18	254.47	1.767
22	314.00	1.800
24	454.39	3.142
30	706.86	4.910
36	1,017.88	7.070