Our pave in grate and frames are available in a range of sizes. Hinged and lockable, these grate and frames are the perfect "hidden" pit option, allowing you to tile inside the top, only seeing a lip on the side for the collection of water. Please note that the larger sizes are double hinged with 2 tops. Product Drawings 300mm x 300mm 450mm x 450mm 600mm x 600mm 900mm x 600mm 900mm x 900mm MaterialThis product is made from Hot Dip Galvanised Steel.It is suitable for exterior use and is typically used to cover a pit and collect water.Load RatingThe load rating of these grates depends on the size purchased.300mm x 300mm, 450mm x 450mm, 600mm x 600mm - Medium Duty900mm x 600mm, 900mm x 900mm - Light DutyThose sizes that are medium duty are Class B and take cars and light trucks.Those sizes that are light duty are Class A and take pedestrian traffic only.