I'm redoing a small (5X6) bathroom and I wanted to do a similar 2 sided glass enclosure. However, the wall alongside the bathtub has a vanity and the wall will be 4 feet high as will a small portion on the front wall. My contractor is giving me a hard time. He wants to build a beam from floor to ceiling on the corner where the 2 glass walls will meet because he claims it will be better supported. Is this true? isn't there a better way to do this without destroying the open look with a beam? How was this shower supported?