according to the embodiment of fig1 there is provided a ladder rack 1 ( only part shown ) mounted on a ute tray 2 provided with a roll top 14 running in a horizontal rail 4 mounted on the inside top edge of the vertical side 3 of the utility vehicle tray 2 . it will be appreciated that the embodiment of fig1 is modular and incorporates a foot 5 incorporating a planar horizontal plate 6 ( best viewed in fig3 ) adapted to be screwed using screws 16 to horizontal rail 4 of roll top 14 . the foot 5 incorporates an upstanding tubular portion 7 adapted to slip inside substantially vertical leg 8 which in turn is adapted to slip inside and support the central horizontal load carrying bar 9 . screws 18 may secure vertical legs 8 to load carrying bar 9 and screws 15 may secure feet 5 to verticals 8 . it will be appreciated that the substantially vertical leg 8 of this embodiment is angled inwardly for aesthetic reasons at an angle of approximately 30 ° from the vertical although this will vary depending upon the vehicle concerned . furthermore it will be noted that the upper extremity of leg 8 is provided with a rabbit &# 39 ; s ear 10 adjacent to its upper extremity in order to assist in locating items on load carrying bar 9 and preventing lateral movement of such loads occasioned by cornering of the vehicle . it will be appreciated that a complimentary right - hand substantially vertical leg ( not shown ) and foot would be provided to complete the ladder bar depicted in fig1 . hence the ladder rack depicted in fig1 comprises five modular pieces being two feet , two substantially vertical legs and one horizontal load carrying bar therebetween all adapted to be securely located to each other once mounted upon a vehicle but capable of independent and compact storage . the load bar 9 may however in some embodiments be unitary ( not shown ) with the legs 8 . the longitudinal rake of the front ladder bar can be varied ( not shown ) to match the rake of the “ b ” pillar of a vehicle by utilizing different feet having upstanding portions 7 angled from the vertical with respect to base plates 6 . furthermore differing heights of ladder bars may be accommodated by utilizing common vertical legs which may be cut down to shorter lengths before being slipped onto the feet . similarly the load carrying bars 9 may be stocked in the longest required length and then cut down in length to suit the width of a particular vehicle . turning now to fig2 it will be noted that a utility vehicle tray 2 is depicted without the installation of a roll top 14 . in this application a different foot 5 a is utilized which includes a shorter horizontal base plate 6 a ( see fig4 ) adapted to sit on the horizontal surface of the top of the side 3 of the ute tray . the foot also includes an additional plate 11 welded perpendicular to plate 6 a and extending downwardly and substantially vertically to facilitate fixing the foot 5 a to the inside vertical surface of the tray side 3 via bolts 17 . it will also be noted that the substantially vertical leg 8 depicted in fig2 includes not the rabbit &# 39 ; s ear 10 of the corresponding leg of fig1 but rather a lateral extension 12 having an upstanding edge 13 so as to facilitate the carrying of wide planar articles requiring support such as fibreboard sheeting ( not shown ). additionally a hole or holes ( not shown ) may be provided in upstanding edge 13 to facilitate the location of tie down hooks therein . it will be appreciated that by stocking a variety of relatively small components in accordance with the modular system above described a large variety of vehicles and user requirements can be accommodated . for example the foot of fig1 may be combined with the vertical leg 8 of fig2 or vice versa . this system in accordance with the present invention has major advantages to vehicle owners as well as wholesalers and retailers as options like roll tops are often added by owners subsequent to purchase of vehicles and ladder racks . in such a situation as last mentioned where an owner adds a roll top to a vehicle after a ladder rack is installed the modular nature of the present invention allows the same ladder rack to be reinstalled on the vehicle by the simple relatively economical step of buying different feet adapted to bolt to a roll top rail rather than to the inside vertical surface of the tray . to facilitate this easy conversion the width of the front and rear ladder racks for a given vehicle , particularly when their horizontals and verticals are fabricated as one piece , should be sized so that the upright tubing straddles the transition from the inside vertical wall of the vehicle tray to the horizontal top of the side of the vehicle tray . it will be appreciated that the uprights depicted in fig1 - 4 hereof all span this transition so that relatively compact feet can be fabricated for any given vehicle whether fitted with a roll top or not . from fig1 - 4 hereof it will be observed that the upstanding tubular portions 7 of the feet 5 are a relatively snug fit inside the vertical legs 8 and it is important for aesthetic reasons that the foot fit within the leg and not vice versa . in this way the foot is largely invisible and unobtrusive except for its horizontal plate 6 . the ladder racks of the present invention may advantageously be fabricated from relatively large diameter aluminium and the feet likewise from aluminium . it should be appreciated that alternate embodiments apart from those above depicted and described may be devised without departing from the scope and intendment of the present invention and for example the method of fixing the feet to the vertical sections and the vertical sections to the horizontal sections by screws may be varied .