pedestrian overpass yarrawonga, palmerston, northern territory: engineering and

engineering robust torsion elevated column pylon substructure beams girder cap pier pile anchor superstructure pedestrian walkway safety yellow public community highway cement walk connecting crossing high deck height water bridge palmerston city northern territory australia strong bearing civil town planning accident rigidity tensile strength force load loading loadbearing yarrawonga overpass territory: design low-angle photograph underneath highlighting elements indicating structural