Sadr Elevated Expressway, Middle East, 2012
PSM Launching Gantries
SADR Elevated Expressway was built directly above the existing SADR highway, an extremely congested major road in the northern suburbs of Teheran. The expressway is almost 6 km long with twin decks, consisting of 110 spans with a typical span length of 50m.
Forced to follow the existing highway alignment the combination of 6.6% longitudinal slope, transverse slope of 5.2% and a tightest curve radius of 380m was a technical
challenge for the Launching Gantry design. The limited workspace was also a challenge for the Launching Gantry assembly methods.
SDI supplied 4 No Launching Gantries for the project and was later awarded a separate contract for the LG operation and bridge deck erection on the western half of the project.