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spec: Thirty-six inch fans need to be placed every 30 feet and 46 inch fans every 40 feet . Clutching a handful of Internet printouts , Whiting told about 50 people spread out among the pews that Fenty ( D ) is attempting to seize control of the system so he can close traditional public schools to open charter schools . Then , on the clergy side , the model focuses on the manner in which preachers responded to and attempted to seize control of the emerging popular dissent . As the beetles feast on the trees , woodpeckers feast on the beetles , leaving behind telltale signs that include mounds of bark chips at the base of trees and reddish or white boles , depending on how much bark a woodpecker flakes off as it searches for food .