When you require economical seating that can be used in one location and/or moved to another, and also be used indoors or outdoors, CBS Constructors bleachers will provide an excellent solution. Our portable units are available with either aluminum or galvanized steel understructure. The units are available in 3, 4, 5, 10 and 15 row depths and standard lengths of 15, 21, 27, 30 and 33 feet. Guardrails and vertical aisles may be added per code requirements. Tip-N-Roll and Tow Packages are also available.