Swimming pool slide
(28) Swimming pool slide means any device used to enter a swimming pool by sliding down an inclined plane. (29) Tamperproof means that tools are required to alter or remove portions of the slide such as guards, treads, etc. (30) Trajectory means the path of a slider's center of gravity from start to finish. (31) [Reserved] (32) Tread contact surface means foot contact surfaces of ladder, step, stair, or ramp.