2345 hours – Box Alarm – Scotten and Toledo, fire reported in a vacant dwelling, Central has no address. Engines 27, 29, 33, Ladder 8, Squad 4, Chief 7. Chief 7 reports first engine will be stretching, 2 story, occupied, dwelling and requested an additional company for manpower (Engine 39). Engine 27 stretched and companies went in service with a 1.5 inch and 2.5 inch lines before a partial collapse of the porch roof. Chief 7 requested companies to go defensive. Engine 29 dumped monitor and Ladder 8, the only remaining tractor drawn aerial in the city, set up for water tower operations. The fire was placed under control at 0126 hours. Primary and secondary searches could not be completed due to structural integrity.