Ceiling fixtures in older homes hit wooden beams that are not where the plans say they are — adjustable bar hangers solve it without sistering. Ceiling box with adjustable bar hanger. Hanger bar spans 16-inch to 24-inch on-center spacing. 1/2-inch knockouts for conduit and NM cable. Rated for fan fixtures when properly anchored to building structure. Remodelers and electricians working older homes across northeast Nebraska and northwest Iowa face off-center ceiling joists every other job — adjustable bar hangers are the fast solution. In stock at Crofton Lumber (Crofton, NE) and Akron Lumber (Akron, IA). Stocked at Crofton Lumber and Akron Lumber.