Grate block for a combustion grate

A grate block for a combustion grate in which sequential grate blocks are arranged one above the other in a step-like manner and are configured so as to rearrange and convey the combustion material during combustion by means of pushing movements which are carried out relative to each other, wherein the grate block comprises a block member which is constructed as a cast component and which comprises an upper wall which forms a support face which extends at least partially parallel with a longitudinal axis L of the block member and along which the combustion material is intended to be conveyed and whose foremost end when viewed in the pushing direction S forms an edge via which the support face descends into a pushing face which is formed by a front wall, the front wall has at least one air supply opening which when viewed as a longitudinal section extends perpendicularly or obliquely with respect to the pushing face in order to supply air to the combustion grate and is constructed in the lowest region thereof in the form of a base which is intended to be positioned on the support face of a grate block which is adjacent in the pushing direction S, wherein at least the front support edge of the pushing face is arranged in a plane E which extends substantially perpendicularly to the longitudinal axis L, wherein the edge is offset forward with respect to the plane E when viewed along the longitudinal axis L and in the pushing direction S.