TSP12E Series Mobile Elevated Grandstand Bleachers PATENTS PENDING Overview TSP12E mobile grandstand bleachers offer increased spectator visibility at your sports and special events with elevated mobile bleacher seating. Bleachers are equipped with a front mounted aluminum walkway with guardrail and entry stairs, that travels with the bleacher. TSP12E mobile grandstands are equipped with a self-contained hydraulic actuation system that enables one-person bleacher extension and set up. Extensive use of aluminum, offers increased spectator comfort, increased corrosion resistance, and reduced weight for easier towing and less surface impact. TSP12E series elevated mobile bleachers set a new standard for mobile spectator seating.