River crossing has always been a challenge for the humankind. Today it is possible to build structures having not only a functional role but even a high aesthetic and architectural value.
Road and railway bridges: steel bridges building proved building cheapness and reliability in time, in the railway and road industries, too. Mixed steel-concrete solutions, getting the most of the material features, are a particularly interesting building solution, apart from architectural aspects.
Bike and pedestrian boardwalks: many lights to pass, many building forms, each one characterized by slenderness, that is barely the symbol of metal building. The framework can be integrated to the railing and it can shape a wide upper arch or a lower inverted arch. It has been almost completely built in the workshop or in the building site depending on the situation and the accessibility. The footpath ground can be varied too by using different quality wood or metal or synthetic sheets or all of them.