FLOWING GRAIN ENTRAPMENT
3
800-AOW-01-IADO © 2019, Workplace Safety & Prevention Services (WSPS)
1 877 494 WSPS (9777) | 905 614 1400 | wsps.ca
Collapse of a vertical grain wall
Grain that has spoiled can cake in large vertical columns.
As grain is removed from the base of a caked mass, the
potential for an avalanche and engulfment increases
dramatically. If a worker tries to break up the grain by
poking with a shovel (or other tool), the grain can break
free and result in an avalanche, completely burying the
worker (see Figure 3).
Preventing vertical grain walls
Ensure workers are using a lifeline that is securely tied
If entry is required, the worker should be lowered
from the top of the bin, dislodging the grain as they
descend into the bin (this keeps them above the
vertical column)
At all times, be prepared for the entire grain wall to
break free and fall
Use proper storage techniques to avoid conditions
that cause spoilage
Grain Bin Rescue Procedures
Precautions for rescuers
1. Shut off the grain-moving machinery – stop the flow of grain
2. Always assume that an entrapped victim is alive
3. If possible, ventilate the bin using the drying fan without activating the heat source
4. If bin entry is required, the rescuer who goes into the structure should wear a body harness and be
tied with a safety rope to at least two rescuers on the roof of the bin
Figure 3: Vertical grain wall
Source: North Dakota State University Agriculture
and University Extension
WSPS.CA
