Reinforce the floors! Richard Serra is coming. But this time there’s no need for the artist’s usual entourage of cranes, rolling gantry, and team of welders. Serra has been chosen to receive an honorary degree from the Pratt Institute at the art and design school’s 120th commencement on May 18, when approximately 1,200 graduating bachelor’s and master’s degree candidates will receive their diplomas. Where, you ask? At a venue not usually associated with Serra’s transcendent abstraction: Radio City Music Hall. [Cue Rockette kick line] In addition to Serra, Pratt will award honorary degrees to musician Judy Collins and children’s book author and illustrator Tomie dePaola.