Gully tops and manhole tops for vehicular and pedestrian areas. Gully tops and manhole tops made of steel reinforced concrete|Rainwater control systems, Statistical quality control, Gullies, Construction systems parts, Test specimens, Deflection tests, Slots, Concretes, Quality control, Surface-water drainage, Inspection, Cast-iron, Drainage, Manholes, Loading, Certification (approval), Position, Dimensions, Reinforced concrete, Quality assurance, Marking, Roads, Type testing, Design, Cast steels, Grades (quality)