Grain Systems Tanks PNEG-1092 - Manual (Page 14)

2. Decals
14 PNEG-1092 30° Bin Roof Construction
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.
(Based on grain with an angle of repose of 27°.)