building building work construction construction helmet high metal work pipes railing rails sacfety line safety safety harness safety helmet safety mesh scaffolding steel scaffolding tall welder welders welding workmen carpark multi-storey multi-storey carpark architecture construction work dust protection facade scaffold white mesh angles building construction construction site danger heights net netting safety netting security work work-safe helmeted helmets workers construction sites cranes adornments appearance architectural balconies balcony bright cambodia contrast contrasting cultural culture decoration decorative design Designs detailed distinctive exterior height light ornamental ornamentation perspectives protection safety-rails shade shape shapes style surface surfaces textures arches bridge cables concrete highway overpass pedestrian suspension suspension bridge walkway posts rods steel waterway