The principle that guided the design was to achieve a simple spanning bridge without supports in the road. This is achieved with a double trust structure that lands at both sides of the road with a clear spatial character. The footings where the bridge lands give character to the whole envelope. The shapes are the result of the folding promenade where the circulation from ground floor in one side to the other side cuts through the plan and section. Each footing faces opposites directions giving orientation to the users. The bridge building skin is retracted from the floors in order to protect the facade from direct sun exposure.