Abstract: A gas permeable structural part, particularly for use in burning and sintering devices, for withdrawal preferably of hot gases from a layer of granular material with a group of rods arranged parallel to one another and spaced from one another, which rods form a gap respectively therebetween, the gap width being smaller than the diameter of the smallest material granule. The grid rods have the smallest possible cross-section, and extend as short as possible in a direction perpendicularly to the surface of the structural part, solely assuming the mechanical pressure of the material loading the grid rods without deformation.