e-mosty December 2017 MSS and Formwork Travellers | Page 38

The new Vistula crossing integrated into the S2
Expressway and consists of two parallel decks
with the following lengths:
 Central bridge MG04-02 measuring 536.5
m per deck;
 MG04-01 and MG04-03 access viaducts
with a total of 970 m per deck.
→ Figure 2: Location of the bridge on the map
Source: Google maps
Figure 3: Vistula Bridge general plan view
III. Main requirements of the equipment used to
build the decks
Taking into account the conditions of the location
of the crossing, the type of structural solution for
the deck and the organization of the intended
work cycle, the solution that was deemed most
advantageous was the one that integrated the
Overhead Movable Scaffolding System (OHMSS)
combined with a Wing Formtraveller (WFT) for
onsite concreting of the decks of the access
viaducts.
The broad range of technical requirements used
during the design and dimensioning phases of the
OHMSS included the following features:
The OHMSS is used for concreting the central
deck box and the WFT used to install the pre-
fabricated struts and concrete the wings.
4/2017
 the outer formwork of the OHMSS must be
possible to open when free distance to the
ground is only 3.0m;
 the outer formwork must be able to pass in
the closed position over the existing railway
without reaching a height of more than 0.7
m (see Figure 3);