The €35m project will connect two tunnels on either side of the Arazim Valley, near Jerusalem, using cranes climbing to final working heights of up to 115m.
Comasco, based at Kokhav Ya’ir, had to install tower crane foundations to counter the rugged and uneven terrain at the site.
The six top-slewing Potain cranes include a 16t MD 365 B, two 8t MDT 178 cranes, and three 12t MD 285 models, and are operating around 12 hours a day, six days a week to perform general lifting duties and to pour concrete.
The cranes are all climbing units and anchored to the pylons they are constructing, said Manitowoc, Potain’s parent company. They will remain at the project until the end of 2015.
Haim Danon, managing director at Comasco, said: "Over the past 50 years, our work and our cranes have built some of the most iconic projects in Israel, and we are very proud to reach this milestone.
"Thanks to our excellent people and the strong partnerships we have with the world’s best equipment manufacturers, like Potain, we work on the country’s most important projects — and this bridge is the latest example of our achievements."