text: And the Washington Building and Construction Trades Council threatened to call a general strike of all construction workers if the bricklayers were not pulled off the job installing boiler insulation and the asbestos workers' union allowed to do the job instead.Senator Wagner also said on Sept. 28 that he believed a resolution to the carpenters/iron workers dispute (which had led to the layoff of 1,000 workers at the Labor/ICC building) could be reached. But the boilermakers did not return to work, leaving 450 workers laid off. Meanwhile, government officials said that the caulking, insulation, and pulley work disputes would be resolved soon, and would not in any case cause further disruptions at construction sites. Another major work disruption threatened the Federal Triangle complex when the iron workers' union demanded that contractors initiate two four-hour shifts per day rather than one eight-hour shift per day in order to spread work among more men. When contractors balked, the union struck at the Post Office and Justice building sites. That strike lasted two days before about half of the employers capitulated. But it continued for the remaining employers at the Justice and Post Office buildings. 