Allentown 9-1-1 center transmitted the box for 1739 South Fourth Street at Montgomery Street for a structure fire at 0626 hours. Engines 14, 11, 6, truck 2 and Battalion 1 (Shott) take in the box. Engine 14 arrives at the Hamburger Stand and reports heavy smoke showing from the one-story building. Engine 9 is assigned RIT BC 1 arrives and has fire venting from the roof. He orders all firefighters out of the building and puts truck 2, the squirt on 6 and the ladder on 11 in-service for an outside attack. BC 1 strikes the second alarm at 0641 hours. Engines 4, 10 and air 1 along with Cars 40,41,47 & 48 respond. South Fourth Street was shut-down for a couple of hours while crews worked the scene.