50M, 1000T PSM LAUNCHING GANTRY ASSEMBLY AND GIRDER ERECTION

In 2012 SDI supplied four PSM Launching Gantries to PayabZamzam for the SADR Elevated Expressway Project in Teheran,Iran. The supply contract included the assembly and commissioning work of this equipment. In 2013 SDI was awarded an additional contract for the operation of two Launching Gantries.

SDI mobilised a team with more than 60 managers, technicians and skilled workers. The team finished construction of 108 spans of box girder in 6 months.

The SADR Elevated Expressway project had many challenges:

Lifting capacity: ranging from 5tons~1800tons (SDI had designed & made)

The SADR Elevated Expressway project had many challenges:

Assembly of the Launching Gantries in very restricted workspaces, and during overnight road closures.
Simultaneous operation of the Launching Gantries on the left and right spans to reduce pier loadings.

Combinations of maximum longitudinal slope of 6.6%, maximum transversalslopes of 5.2% and 380m minimum radius curved sections provided a big challenge for Launching Gantry operation.
Operation over live traffic, which required high standards of management and safety.
Construction works were carried out 24 hours a day. SDI worked a 3 shift system with many critical operations carried out during overnight road closures