Bayonne Bridge Update | The City of Bayonne, NJ: "The assembly of the gantry is 95% complete. The gantry will have a load and performance test on December 8. This gantry will carry the pre-cast roadway slabs to the new piers. The piers are the columns that will hold up the roadway. The crane height will start at 120 feet and then grow to 300 feet once it gets closer to the Kill Van Kull.