At 1221 hours, Box 59-1 sent Company 59, Engines 54, 55, 88, and Truck 50 to 1001 Spring Road, Building D at the Spring Street Gardens apartment complex for a fire reported in the wall. Responding units were advised of a worker who was soldering a pipe that caught insulation on fire and now was running up the ceiling on the first floor. With this info, Engine 59 requested the box be upgraded, adding Rescue 91, Truck 46, Squad 8, and Air 91-2 to the box. Engine 54 arrived with a smoke condition in the area and laid a supply line from the hydrant at N. Spring and Wharton to the side A/B corner. Heavy smoke was showing from the eaves of the roof line of an occupied, 2 story, apartment building. Apparatus access to the building was limited due to the nature of the layout and only Engine 54 and Truck 88 could get positions in the front of the structure. As conditions deteriorated quickly, Command 59 requested a second alarm to the scene (Engines 71, 46, Trucks 48, 74.). Heavy fire consumed the second floor and roof as companies stretched several lines. A trench cut was made that stopped the horizontal fire spread. Trucks 32 and 34 were special called by command for manpower. The fire affected at least 4 apartments and displaced 14 occupants.