Abstract: A method and apparatus for covering open truck beds so as to prevent material being carried in the bed from flying out during transport including the equipping of a truck with a specially designed roll up tarpaulin, engaging the rolled up tarpaulin with a specially designed telescoping hook arrangement, pulling the tarpaulin on its rolled up position by guide members resting upon the edge of the sides of the truck bed, and fastening said tarpaulin to the end of the truck bed in such manner that it drapes within the sides of the truck bed so as to completely prevent inadvertent discharge of material.