load device for example an ld 6 the cargo unit 1 comprises a housing 3 protecting the inside of the cargo unit 1 from contamination by dirt or preventing unauthorized access to the interior of the cargo unit 1 the housing 3 comprises amongst other surfaces a base element 5 a top element or ceiling 7 and a sidewall 9 and can be made for example from aluminum the base element 5 and the top element 7 both extend in a horizontal plane the sidewall 9 extends generally in a vertical plane i e perpendicular to the horizontal planes in which the base element 5 and the top element 7 extend whenever the terms horizontal and vertical are used with reference to a cargo unit or another object it is understood that the respective cargo unit or other objected has an evident regular orientation in which vertical and horizontal directions are clearly and unambiguously defined the housing 3 comprises a transport opening 11 13 having a vertical section 11 and a horizontal section 13 the vertical section 11 extends in the sidewall 9 and therefore generally in a vertical plane likewise the horizontal section 13 extends in the top element 7 of the housing 3 and therefore generally in a horizontal plane the sections 11 13 of the transport opening 11 13 are delimited by rails 15 and two parts 17 19 of a transport cover 17 19 which are in their respective opened position the rails 15 are provided to guide the parts 17 19 of the transport cover 17 19 when moving between the respective opened and closed positions and hold the extended.