At the heart of Boston’s Back Bay neighborhood, a 61 stories, 742 foot (226 meter) building will arise. One Dalton will be the third tallest and most luxurious tower of Boston upon completion in fall 2018. Besides the 442 units of residential area, a 23-floor Four Seasons hotel will form part of the tower.
Four Season is renowned for its service and guests of the hotel, as well as the owners of the private residences managed by Four Seasons, can enjoy all amenities in One Dalton.
These include an indoor swimming pool, a spa, private theater, a golf course and a 5,000-square-foot park. The building has a soft triangular form and offers stunning views across the city, through its glass facade.
The facade access solution
In order to maintain the elegant look of One Dalton, it’s key to provide safe access to the complete facade to perform maintenance work.
The roof car
On the roof of One Dalton, a fixed roof car with a telescopic jib will be installed on roof level. The maximum outreach of the boom is over 103 feet (31,5 meters), which enables access to the complete facade with only one machine.
To be able to hide the machine from sight when in parking position, a telescopic base is used. When the machine is deployed, the base extends, lifting the BMU to its working position.
This BMU is compliant with standards ASME 120.1 (2008) and OSHA 1910.66 (1996).
A unique gondola for full access
What makes the XSPlatforms solution so unique, is its custom engineered gondola: to access the curved corners of the building, the gondola can fold its ends to match their radius.
When reaching the straight parts of the facade, the ends can slowly be folded back out again. On the front of the gondola, an extendable platform can be deployed to enable workers to reach coves that are made in the facade.
This way, workers have full access to the facade. The images below show the unique features of this gondola.
A Glass Replacement Unit (GRU) on the gondola enables workers to effectively replace broken windows, which form the magnificent facade of One Dalton. This GRU is able to carry a maximum load of 1500 lbs (680 kg).
Mullion guide rails and trolleys are used to restrain the gondola to the facade, preventing it from swaying. Because the lower levels protrude, the mullion guide rails can’t provide sufficient restraint there. A soft rope system is used for restraint on those lower levels (and for balcony areas).
Specifications of the BMU:
• 1 x fixed roof car with a telescopic jib
• Approx. lifting height: 755 ft (230 m)
• Max. outreach of 103 ft (31.5 m)
• Movable counterweight
• Telescopic base with a max. height of 20 ft (6 m)
• Specially designed gondola with foldable ends and telescopic front
• Glass hook replacement unit with a max. load of 1,500 lbs (680 kg)
• Max. SWL of gondola: 600 lbs (272 kg)
• Including mullion guide rails and trolleys for gondola restraint
• Soft rope guiding system
Delivering unique solutions
XSPlatforms always strives to deliver the best and safest possible facade access solutions for the world’s most prestigious buildings in order to keep them in mint condition. One Dalton is the perfect example of that and we are proud to provide a unique solution for this iconic tower in Boston.