The 2015 Utah IAAI Seminar in Wendover, Nevada:
SAVE the DATES
February 22-25, 2015
Information On Spontaneous Combustion of Hay
Fire Risk of Wet Hay
The recent flooding requires close monitoring of stored hay for signs of spontaneous combustion. Dry hay (stored at 15 percent moisture or less) is safe for long-term storage. However, if the hay has become wet the quality has been permanently changed and the potential fire hazard from spontaneous combustion increased.
Checking for Spontaneous Combustion
Chemical reactions and microbial growth in hay occur because of the change in availability of moisture, oxygen, and pressure to create heat to the point of ignition and fire.
There will be early warning signs. Watch for steam rising from bale surfaces and condensing on the roof and eves of the barn. Often molds will start to grow on all these surfaces, too. There will be an acrid, hot, tobacco smell rising from the bales. Even before these visual signs appear, it is wise to take the temperature of the bales in the stack.