More than 1,500 pieces of steel have been erected in the 10 months since construction began on the U.S. Olympic Museum in downtown Colorado Springs.But just one piece - an 893-pound, 29-foot-long beam - was the focus of about 100 community members Friday morning.Carrying the Sharpie-inscribed signatures of dozens of construction workers, business people and civic leaders, the beam was slowly hoisted by crane to the top of the four-story museum.