An artist of inordinate gravity , Richard Serra loomed large. Stories and statistics of loads, static and dynamic (dead or alive), escort his oeuvre. Catalogue essays and wall labels emphasize heft, weight, logistics. T.W.U. , a 1980 installation in Lower Manhattan, weighed seventy-two tons. Rotary Arc , erected a few blocks away and weighing in at a hundred tons, was transported to New York from Pennsylvania on five flatbed trucks. Equal (2015), forty tons times eight, Forged Rounds (2019), twenty-one rounds at fifty tons each, the weight limit to truck them over the George Washington Bridge. 1 Each installation is an act of heroism. (In the early 1970s, a rigger died installing a piece at the Walker Art Center.) Serra often declared his appreciation for workers, and the literature leaves some traces of his work’s many manufacturers, from Milgo Bufkin in Greenpoint, Brooklyn to Bethlehem Steel’s Baltimore shipyard to steelworks outside of Frankfurt and Cologne.…