Abstract
A body for a material conveying vehicle is described. The body has an inner base configured to engage directly upon a chassis of a material conveying vehicle; inner side walls extending upwardly from the inner base to define with the inner base an inner volume for material to be conveyed; an outer base and outer sidewalls comprising continuous sheet material disposed around the inner base and inner side walls. The inner base comprises a rigid apertured network structure having a raised profile that projects away from the outer base, and the inner side walls comprise apertured network structures spaced from the outer sidewalls, thereby defining an intermediate volume into which material smaller than the apertures in the said network structures may pass in use; and the intermediate volume is provided with an outlet system from which material therein may be removed.