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HOUSTON, TEXAS - OCTOBER 19: One of three 72,000-pound steam boilers is shown at the start of a 500-foot journey to the top of the 33-story Tennessee Gas Building Thursday. The building occupies a block bounded by Lamar, Milam, McKinney and Louisiana. The boilers, about 24 feet long, 11 feet wide and 12 feet high, will be used to provide steam for the building's heating and air-conditioning system. Mo. O. Schultz of the Murray Iron Works of Burlington, Iowa, manufacturers of the builders, said the boilers are the largest ever raised as high as 500 feet in Houston, Texas. Tennessee Gas Transmission. Crowd watch. (Houston Chronicle via Getty Images)