Storage / Warehouse, Warehouse Mansfield, MA – Sprinklers contain fire that started in tool room at lumber warehouse March 14, 2015 viking210 The blaze was reported about 9 p.m. Saturday at National Lumber at 245 Oakland St., tying up local and area town firefighters for several hours. “The sprinkler system held the fire from spreading,” Deputy Fire Chief James Puleo said. That sprinkler system had to be shut off and the lumberyard hired a “fire watch” overnight. “The cause is still under investigation, but we are leaning toward accidental,” Chief Puleo said, adding the town’s electrical inspector has ruled out an electrical cause. The fire was confined to a tool room inside the warehouse, Puleo said. The deputy fire chief estimated damage at a minimum of $20,000.