. Preferred bleachers feature DOUBLE FOOT PLANKS on all rows. Framesare 100%welded aluminum angle. . Features 2" x 10" anodized aluminum seat planks and 2" x 10" mill finished foot planks on all rows. . Comes with Safety End Caps -No sharp edges to snag clothing or skin.. . Bleachers can be transportable or fastened to a concrete slab (fastening hardware not included). . Some assembly required. . Due to constantly changing specifications, please check local building and safety codes to ensure compliance. .