In order to calculate the actual weight of material in the stockpile, determine the density or weight/cubic foot. Weight (tons) = Volume(ft3) x density (lb/ft3) x 1 ton/200 lb
1 cubic yard = 27 cubic feet
1 cubic foot = 0.037037 cubic yards
CONICAL STOCKPILE VOLUMES (37° Angle of Repose)
Diameter in feet
Height in feet
Volume in Cu Yds
Weight in Tons at 100 lbs/cu foot
26.54
10
68
92
39.81
15
230
310
53.08
20
545
740
66.35
25
1065
1440
79.62
30
1845
2490
92.89
35
2930
3955
106.16
40
4370
5900
132.70
50
8540
11525
159.25
60
14755
19920
185.79
70
23430
31630
212.33
80
34970
47210
238.87
90
49790
67220
265.41
100
68300
92210
To find volumes and weights of stockpiles with other angles of repose, multiply those values in the table by the factor computed as follows. Factor=[1865.4686 (Angle of Repose)] - [0.00DD14 x (Angle of Repose)2] - 0.3819
Bon Tool Co. has made a serious effort to provide exact and current information, but does not guarantee the accuracy of the data. Bon Tool Co. cannot assume responsibility for the application of information nor guarantee results.
