Precast Concrete - Infrastructure, Construction & Plumbing Industries. Access Covers & Gratings . Product: Drainage Grates, Manhole Covers, Perforated Strainers, Preformed Trenches. Material: Cast Iron, Concrete, Steel. Brand: BCP. Place: Drains, Trenches, Walkways. Type: Commercial, Industrial, Residential. Concern: Pollution. Service Option: Delivery. Assurance: Accredited, Certified, ISO9001. Ownership: Australian Owned