Terex units install gantry for Riyadh Metro bridge
BACS consortium enlisted two Terex AC 500-2 all-terrain cranes to facilitate the installation of a launching gantry for one of Riyadh Metro’s light-rail bridges
A pair of Terex all-terrain cranes have supported the installation of a launching gantry for one of Riyadh Metro’s light-rail bridges.
Two Terex AC 500-2 models, owned and operated by Mohammad Abdullah Al Areedh, were enlisted by the BACS consortium to raise the gantry’s 142-tonne beams 16.75m into the air.
The lift had to be conducted within confined space and time parameters; surrounding roads had to be closed, creating the need for urgency.
Mohammed I Alrasheed, operations manager at Mohammad Abdullah Al Areedh, said: “Our ability to quickly transport, set up, and rig the cranes was critical to the overall project and our reputation in the market.
“We were able to drive both cranes to the site and [we] used five flatbeds per crane for transporting additional material, such as counterweight. Once on site, we had both cranes ready to work within four hours with the hard work of five people, which was much faster than what we estimated.”
Alrasheed added that his team selected the Terex AC 500-2 models due to their small operating footprints. He explained: “Our crew was working in the middle of the road, so there was very little room for cranes and operators to manoeuvre. That was one of the reasons we selected the Terex AC 500-2 cranes from our fleet. That particular model has a compact base, which made it easier to position than some of the other cranes in our fleet.”
The Terex units were configured with boom lengths of 37.9m, and outfitted with 180 tonnes of counterweight. Both cranes were augmented with Terex Sideway Superlift (SSL) telescopic boom attachments.
The cranes worked in tandem to lift each of the gantry’s beams to supporting bases, at a radii of 16m and 18m, respectively. It took a seven-strong Mohammad Abdullah Al Areedh crew 10 days to complete the project.
Three consortia have been enlisted to construct the $22bn Riyadh Metro project, which at 176km, is set to become the longest mass transit system in the world upon completion.
Work on the metro system began in 2014, and is expected to complete by the end of 2018.