0450 Hours/ 424 Blair Ave/ Box 702/ A Platoon- E7 and L3 were dispatched to 424 Blair Avenue for a commercial fire alarm. Upon investigation, crews found an exterior fire that extended into the building and the box assignment was requested. C8 arrived and reported a 2 story commercial laundry building with fire showing in the rear. The building's sprinkler system activated a couple sprinkler heads which helped contain the fire. Crews stretched a handline to knock down the fire and started overhauling the effected areas. The fire was placed under control at 0519 hours. The OFM was called to investigate the fire.