. Preferred bleachers include double foot boards on ALL rows. Framesare 100%welded aluminum angle . Seat planks are anodized or powder coated (where applicable). . Bleachers include guardrail system and riser boards on rows 4 and above. . Chain-link fencing is 9 gauge steel . Available in 4 & 5 row models. . Available in 15', 21' and 27' long. . Due to constantly changing specifications, please check local building and safety codes to ensure compliance. .