Also known as: FM…
FM stands for various terms. Discover the full forms, meanings, and possible interpretations of FM across different fields and industries.
Determined by weighing a special type of wooden stick that has been exposed in the woods, its weight being proportional to its contained water. Sticks are rated 1–hour, 10–hour, 100–hour, or 1000–hour based on the time required to lose or gain 63 percent of the difference between the dead fuel itself and the surrounding atmosphere. Fuel moisture percentage is computed by dividing the weight of "water in the fuel by the oven–dried weight of the fuel, then multiplying by 100.
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