PORTABLE OR PERMANENT! Maintenance-free bleachers will last a lifetime, regardless of weather conditions. Under-structures are made from hot-dipped galvanized steel. All parts are electrically welded. Floor and seat boards are fabricated from extruded aluminum. There is plenty of comfort: back-to-back distance is 24", and seats are 10" wide and 8" above each other. Standard bleachers easily adapt to make them completely portable. Shipped knocked down for freight savings. Please check your local municipal codes to determine if guardrails are required for bleachers above three rows. Rows: 3. SIZE: 7 1/2'. Cap.: 15. Weight: 158 lbs.