Catch basin grate riser

A grate riser for use with catch basins and the like during road repaving operations, the catch basins comprising vertically open generally rectangular frames with at least two opposing frame sections carrying inwardly projecting horizontal grate support flanges and cooperating grates with opposite end portions of parallel spaced apart elongated horizontal grate elements adapted to rest on said flanges;

• and the grate riser comprising a vertically open generally rectangular frame coextensive with a catch basin frame and with opposing vertical side and end wall sections of a height substantially equal to the depth of new road pavement, said frame being adapted to rest atop the catch basin frame with its top edge substantially in the plane of the top surface of the new pavement, at least two horizontally spaced apart upper riser elements secured to and depending from each of two opposing grate riser frame sections, which sections correspond to said flange carrying catch basin frame sections, the vertical dimension of said riser elements being such that the combined vertical dimension of the elements and the grate riser frame substantially equals the height of the grate, a pair of elevated horizontal grate support flanges associated respectively with said two opposite grate riser frame sections and connected with said riser elements at lower end portions of the latter, and at least one lower riser element connected with each of said grate riser support flanges and depending therefrom, the vertical dimension of said lower riser elements being substantially equal to the height of the grate riser frame and said elements serving to support the grate riser and a grate thereon when they are supported atop the grate support flanges on the catch basin frame, and said upper riser elements being so spaced as to reside between end portions of elongated horizontal grate elements when the grate is disposed atop the said elevated grate support flanges on said grate riser frame.