Grain Systems Tanks PNEG-4021 - Manual (Page 13)

2. Decals
PNEG-4021 40 Series 18', 21' and 24' Diameter Bins 13
Overfill Warning
Figure 2A Maximum Bin Capacity
WARNING
DO NOT OVERFILL BIN. Stored grain, although heaped in the center, should
be no higher than the roof eaves at the outer edge.
(See Figure 2A.) Filling the bin
above this point creates excessive internal pressure and may cause swelling and
eventual roof failure. The overfilling of a bin may also cause the blockage of roof
vents and eaves, which will lead to a build-up of air pressure causing roof damage.
27°
Roof eave height
(Based on grain with an angle of repose of 27°.)