Universal Series bleachers meet building code requirements without aisles. Standard sizes include 3, 4, or 5 rows in 15-, 21-, or 27-ft. lengths. Feature 12-in.-high front row seat, 6-in. rise per row, and 2- by 12-in. seat plank. Available with either galvanized-steel or aluminum-angle frame. All planking is extruded aluminum for maintenance-free use. For guardrails (on 5-row units only), choose either chain link mesh (shown) or aluminum vertical pickets. Pickets eliminate ladder effect. For transport, add optional tow kit.