If I made a practice of stuffing my customers into a shower stall that barely met the 900-square-inch minimum size, I wouldn't be leaving them with much to sing about. Complying with a building code is only the beginning when planning a successful bathroom. My business focuses exclusively on bathrooms, and over the years I've applied the NKBA's (National Kitchen and Bath Association) 41 Guidelines for Bathroom Planning to my work. Intended to take design beyond mere compliance, the guidelines address user anatomy, safe and comfortable movement, accessibility, and pleasure. In this article, I'll discuss some of the things I consider when dealing with a tub or shower installation. Shower Space A square or rectangular shower should have a minimum space