Fabricating an outdoor handrail is a multifaceted project that involves welding both indoors and outdoors with different techniques. The techniques shown in this project can be applied to your own project, but in this case, our railing was designed to be attached to an existing parapet to surround a rooftop deck. While aesthetics is important, the first priority of an outdoor handrail is its safety. Fabricators working on an outdoor handrail for a commercial building or public venue should always begin by checking with local codes and ordinances.