When it comes to commercial quality slides, there are several categories. The first category of slides involves slides used for school playground equipment. These slides can be either free-standing, such as the stand-alone slide structures, generally consisting of a slide accessed by steps or a combination of steps and climbers. Or, they can be a part of a composite play structure, such as the straight playground slides, winding slides, curved slides, twister slides, wavy slides, tubular slides, sectional slides, double slides, triple playground slides, etc.