EJ Lion D.I. Grating 360X310 100H D400 Locked is an end hinged ductile iron grating and frame with a lockable grating. The frame is 3 sided frame and flat. The grating has a D400 rating and is suitable for use on Carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles. The grating has an open area of 360mm x 310mm.