Dauphin County Box 301 (Penbrook) sounded at 1630 hours for a reported structure fire at 2723 Banks Street. Officer from Co. 30 arrived with a working fire in a 2 story, unoccupied, duplex. Truck 32 (Progress) arrived and took position on side 1 in front of Engine 30 (Penbrook). Companies stretched multiple lines knocking down a fire in the rear of the second floor with heavy smoke throughout the fire building and exposure.