Grain Bin Freezing and Bursting -- Loss Prevention Suggestions

<p align="left"> <font face="Times New Roman">Farmers Alliance noticed an increased frequency of a somewhat unusual loss phenomenon in Kansas</font><font face="Times New Roman">. Because this is relatively new to them,&nbsp;they contacted an expert on loss </font><font face="Times New Roman">prevention that measures for this type of loss.</font></p> <p align="left"> <font face="Times New Roman">According to Dr. Kenneth Hellevang of the Agricultural &amp; Biosystems Engineering</font></p> <p align="left"> <font face="Times New Roman">Department at North Dakota State University,</font></p> <p align="left"> <font face="Times New Roman">&ldquo;Frost and ice may form on grain bin vents at temperatures near or below freezing.</font></p> <p align="left"> <font face="Times New Roman">Moisture from the air condenses and freezes on the cold metal surfaces. The</font></p> <p align="left"> <font face="Times New Roman">accumulation can seal the vent so air cannot </font><font face="Times New Roman">fl </font><font face="Times New Roman">ow through the vent. A fan used for grain</font></p> <p align="left"> <font face="Times New Roman">drying and aeration develops pressures of 4 to 6-inches of water. This is about 21 to 31</font></p> <p align="left"> <font face="Times New Roman">pounds per square foot pushing on the roof. Even though this seems like a small pressure,</font></p> <p align="left"> <font face="Times New Roman">it is a total force of about 21,375 pounds on a 36-foot diameter bin. This amount of force</font></p> <p align="left"> <font face="Times New Roman">will damage the bin roof.&rdquo;</font></p> <p align="left"> <font face="Times New Roman">He added,</font></p> <p align="left"> <font face="Times New Roman">&ldquo;To properly manage stored grain, it is necessary to operate fans on bins at temperatures</font></p> <p align="left"> <font face="Times New Roman">near or below freezing. We recommend that you consider advising insureds to leave</font></p> <p align="left"> <font face="Times New Roman">the </font><font face="Times New Roman">fi </font><font face="Times New Roman">ll hole or access door on the roof, or both, open as a pressure relief valve when</font></p> <p align="left"> <font face="Times New Roman">operating the fan at near or below freezing temperatures to minimize the potential for</font></p> <p> <font face="Times New Roman">damaging the bin roof.&rdquo;<span _fck_bookmark="1" style="display: none">&nbsp;</span></font></p>