Precast Concrete Box Culvert are an ideal solution for drainage culverts with wide flow and low hydraulic head. precast concrete box culverts are also suitable for difficult site conditions as installation requires minimal excavation and backfill. Designed and manufactured in accordance with all current design specifications and relevant standards, box culverts are available in span sizes from 1000mm to 2400mm and internal heights from 500mm to 1200mm dependent on the final mould configuration adopted.