Knauf Plasterboard Tianjin, one of the companies tangled in litigation over defective Chinese-made drywall, said it has reached a settlement with builder Beazer Homes USA, an indication that Knauf is moving quickly to settle claims before lawsuits go to court. Atlanta-based Beazer didn’t respond to request for comment. But Kerry Miller, a partner at New Orleans law firm Frilot, which represents Knauf, confirmed that a settlement had been reached. Miller said Knauf, known as KPT, is in talks with between six and 10 other builders that had used its Chinese-made wallboard.