Mansfield, MA (Norfolk) - The homeowners returned home to their 355 Otis Street home around 1730hrs on April 12, 2010 to find a heavy smoke condition in the dwelling. They called 911 and placed their dogs outside as the fire department responded in to the scene. Engine 4 arrived to find smoke showing from this 1.5sty wood frame dwelling. All occupants were reported outside safely as attack lines were stretched into action. Firefighters found fire in the outside walls of side C extending from the basement to the ceiling joist of the first floor. Personnel from Engines 1, 2, and Rescue 33 all went to work opening up the interior and exterior siding to expose the fire. North Attleboro Ladder 1, who was dispatched on the initial alarm due to Mansfield's tower ladder being out of service set up on the A/B corner to open the roof if needed. A 200' 5" LDH supply line was laid into the scene to supply Engine 4 if more water was needed. Foxborough Engine 22 responded as the R.I.T. and stood by at the ready with command on the A/D corner of the property. The fire seemed to be contained to 2 bays on side C with some extension to the rear deck floor joist. The entire dwelling suffered from heavy smoke damage.Two hand lines were stretched in from Engine 4 and only one was charged. The Special Signal Association responded to the scene to provide refreshments to the firefighters.