30 Billion Board Feet February 23, 2015 Email The U.S. is the world’s largest producer of lumber, generating 30 billion board feet of lumber every year. (A board foot is the equivalent of a piece of lumber that is one foot long, one foot wide, and one inch thick.) 30 billionĀ board feet is enough lumber to wrap the earth in a one-foot wide belt of lumber 228 times every year. Two-thirds of lumber usage in the U.S. is for home building and renovation.