Just after 730 am companies were dispatched to 525 Bridgeport Ave for smoke in the building. First in units found heavy smoke throughout a 3 story commercial building. Engine 2 laid in from a hydrant and stretched a hose line into the building while Ladder 33 laddered the building and assisted. Fire was found in the 2nd and 3rd floor stairwell area and quickly knocked down. Additional units stretched a 2nd line, searched the building and opened up the walls and performed overhaul. Units on scene – Car 3 Car 5 Car 6 Engines 2,4,42,44,52 Ladder 33 and Squad 30