into two layers of square cells by a lateral divider 38 and a plurality of upright dividers 40 the short sides 42 of each panel 36 each define two spaced undercut grooves 44 the panels 36 are connected together short side to short side by a slim sheet 46 which includes two spaced pairs of opposed head and neck projections 48 to be received in the undercut grooves 44 the head and neck projections 48 run for the length of the grooves 44 the panels 36 are suspended from the space frame 12 by tie elements 50 certain of the slim sheets 46 include a tab 52 having a circular aperture 54 the aperture 54 receives a short shaft 56 on a yoke 58 the yoke 58 is connected to a tie rod 60 which passes through opposed bores in an elongate space frame member 24 and receives a bolt 62 at its upper end to retain the tie element 50 at each side of the bridge 10 is provided an upstanding porous wall 64 which slopes inwardly and may be about 3 m tall this porous wall 64 acts as a wind shield for vehicles or people on the bridge 10 as the space frame 12 is fully enclosed it need not be made from expensive highly corrosion resistant steel and no painting is necessary also the bridge 10 presents a much more aerodynamic shape to the wind which reduces stress and wind induced oscillations on the structure any maintenance on the structure is easily carried out as the panels 36 will support the weight of a man so that a maintenance.