A protective cover for deployment within the interior of a conveyor truss of a conveyor belt-driven bulk material handler. The protective cover comprises an apical support member configured for resilient attachment to an upper, central truss member of the conveyor truss such that the apical support member hangs above the conveyor belt when the cover is deployed. The cover comprises a pair of parallel support members, each configured for fixed attachment to opposite lateral conveyor truss members. The apical support member and the parallel support members together form a triangular arrangement of support members within the conveyor truss when the cover is deployed. Also provided is a rectangular sheet of protective material having a means for attachment of opposite sides thereof to a corresponding member of the pair of parallel support members. The rectangular sheet is centrally stretched over the apical support member to form a triangular cover structure disposed above the conveyor belt when the cover is deployed.