Boxwall NOAQ application BW102, the 1000mm high barrier in spillway. BW102 1m high mobile flood barrier being overtopped. BW52, the 500mm high mobile flood barrier being overtopped. Boxwall - the individual units: Left gable, outer corner, inner corner, straight unit, right gable. Boxwall - all individual units are easily connected to prevent commercial flooding Gable set, seals the ends and prevents commercial flooding Gable set used to step up over a gutter. Gable end used to seal against a wall, a better alternative to flood control sandbags Outer Corner and Inner Corner to stop and prevent commercial flooding 90° corner is made using 3 inner corner units. 90° corner is made using 3 outer corner units. Boxwall units stack for compact storage and transport. Inward corner, straight and outward corner. Straight units seal off an opening. Boxwall, the best alternative to sand bags.