Measure and Reduce the header rail. Pull the shower door closed and lengthen your tape measure from just one facet to one other. Mark the size on the body header and make use of your hacksaw to chop it to sizing. Clean down the raw edge using a metallic file.[thirteen] https://dantefezwr.thezenweb.com/not-known-factual-statements-about-glass-shower-door-installation-70810116