Mammoet installs 1,500 ton airport bridge

Mammoet Seattle Tacoma Airport 1

Mammoet has again challenged racing against time with the installation of an elevated pedestrian walkway bridge at Seattle-Tacoma Airport in the United States. The entire operation was carried out at the airport’s new arrivals facility – while runways on either side remained open to air traffic.

The prefabricated walkway, part of the airport’s US$968 million expansion, weighed 1,472 US tons (1,335 tonnes). Mammoet used 56 axle-lines of self-propelled modular transporter (SPMT) in a four-point configuration, with one set of SPMT at each corner, moving the structure down the airport’s central runway from the assembly area to its installation location which is 3 miles (5 km) away.

The total transport movement took less than three hours, Mammoet positioned the walkway between two of the airport’s piers, where the erection crews took over. The crews used a strand jack system with four 900 ton steel frames to lift the prefabricated structure.

Mammoet Seattle Tacoma Airport 1

With just a mere 1.5 inch (38mm) tolerance for a precise fit, it was then welded into place between the two piers at a height of 22 metres above the ground.

The transport and installation of the walkway was done at night when the airport traffic was the lowest. This minimized disruption at the airport with the entire operation completed in just two nights.

Mammoet Seattle Tacoma Airport 2

The newly-installed walkway is the only second in the world with enough space to allow a Boeing 747 aircraft to pass beneath it. Seattle-Tacoma’s international arrivals facility is scheduled to open in the second half of 2020 and expecting international passenger capacity doubled to 2,600 people per hour.

Leave a Comment

Related Topics

Read More

norfolk naval shipyard
Konecranes has secured its fifth portal jib crane order from the US Navy as part of a $330 million agreement. The $46.8 million heavy-lift crane, with advanced modular features, will be delivered to the Norfolk Naval Shipyard in Virginia.
zpmc crane trojan horse in usa
A recent House Committee report raises alarm over cybersecurity risks posed by Chinese-manufactured ZPMC cranes, which dominate U.S. ports. Experts warn that these cranes could be used for surveillance or remote disruption, posing a potential "Trojan Horse" threat to U.S. maritime infrastructure.
Item added to cart.
0 items - $0.00