At 12:35 hours Station 15 was alerted to assist Stations 3,6&12 on A Commercial Structure fire (69D3) at Fairwinds Automotive. Chief 12-8 (Tillinghast)arrived on scene and advises an active fire in the roof area committing the 1st due engine and ladder placing all other units in level 1 staging. Crew form Rescue 15 assisted with ventilation by cutting the locks on the 4 over head doors and opening them up, securing the electric and some overhaul. Crew from 15-5 stood by. Chief 12-8 placed the situation under control at 12:59 hours releasing Station 15 units at 13:21 hours. Total of 14 members responded.