Evaluate and cut the header rail. Pull the shower door closed and lengthen your tape measure from 1 side to the opposite. Mark the dimensions about the frame header and make use of your hacksaw to chop it to sizing. Easy down the raw edge using a metal file.[13] X https://mnobookmarks.com/story18802029/not-known-factual-statements-about-shower-door-installation-in-needham-ma