At 1417 hours, Engines 5, 10, 1 and Truck 7 along with Battalion 2 were dispatched to a structure fire in the 2000 block of North Elm Street. Upon arrival of Engine 5, they reported heavy fire from a one-story vacant single family dwelling. Engine 5's pump operator quickly charged the deck gun while the firefighter hopped up and operated it to get a quick knock on the fire. While the firefighter operated the deck gun, the engineer quickly stretched the preconnect and Lt. Connelly performed his 360. Battalion 2 arrived with Truck 7 and sent the Truck to the roof, Engine 1 pulled a second preconnect off 5s, while 10s searched. All searches were negative. All companies worked, with an extra engine paged out for RIT. Companies remained on the scene for approximately 75 minutes. There were no injuries at the scene.