e-mosty December 2017 MSS and Formwork Travellers | Page 37

A Movable Scaffolding System for the Vistula River in Warsaw Aquilino Raimundo, Strukturas as Figure 1: OHMSS General view I. Introduction The Vistula River, which extends over 1000 km, is one of the few major European rivers that is not completely regulated, thus preserving its wild nature. As it passes through Warsaw, the waters of the Vistula River vary in depth by as much as 8 meters, varying from a mere 0.5 meters deep to 8.5 meters during the flood season. With a width of almost 1.5 km when the water level is at its highest, the Vistula is a serious obstacle to building bridges and viaducts over its channel during the flood season. The development of solutions for equipment used to build the bridge decks under such conditions led to identifying a broad range of technical requirements that were specifically considered during the Movable Scaffolding System (MSS) design phase. II. General Project Description Construction of the S2 Expressway is one of the most significant investments underway in Warsaw, completing the outer ring of the city and improving the citizens' mobility. 4/2017