How does high altitude affect grain storage choices?

Question

Accepted Answer

Moisture Management High altitude environments often experience low atmospheric pressure, which can result in accelerated moisture loss from grain due to increased evaporation. However, this also means that grain storage structures must be designed to prevent moisture from entering the storage space. A common strategy is to use airtight storage containers or bins with airtight lids, ensuring that the internal humidity remains within a safe range for grain storage (typically between 12% and 14%). For example, a 20-foot diameter steel silo can achieve an average internal humidity level of 13.5% by using a tightly sealed lid and a ventilation system that maintains a slight negative pressure.
Storage Material Selection To protect grain from moisture and other environmental stressors at high altitude, it’s essential to choose storage materials that can withstand the conditions. Wood, for instance, is not a suitable choice due to its high moisture absorption rates and susceptibility to insect damage. Instead, consider using materials like galvanized steel, aluminum, or high-density polyethylene (HDPE) for storage containers and bins. These materials are resistant to corrosion, moisture, and pests, and can be easily cleaned and maintained. Additionally, consider using a 1/8-inch thick HDPE liner in the storage container to prevent grain from coming into contact with the steel or other materials, which can affect grain quality.
Design and Installation Considerations When designing and installing grain storage structures at high altitude, it’s crucial to take into account the local climate and environmental conditions. A well-designed storage system should incorporate features such as: (a) a steep roof pitch to ensure snow and debris runoff, (b) a durable and weather-tight seal around doors and lids, and (c) a secure anchoring system to prevent structural damage from high winds. For example, a 30-foot tall grain storage container can be secured to the ground using 12 anchor bolts, spaced 12 inches apart, to resist winds of up to 100 mph.