Railings/banisters are for security purposes, which play an important role in jazzing home interiors. The term "rails" are often used interchangeably with "rails", which precisely, refers to the stairs.Are railings banisters installed astatine the side of the stairs of which the main function is to prevent serious injury or death from falling. They are everywhere and that cross they come almost every day, anywhere. From simple pipe mounted on the wall to prevent falls, the complex structures, railings come in varied and in many styles. The type of step rails used in every home and building emphasizes the style of architecture.