Marr Climbs One Canal

| Katherine Marr

Working for John Moriarty & Associates, Marr’s Hydro Mobile Division has supplied over 20 mast climbers for façade work on One Canal, a mixed use development on a 1.5 acre lot near TD Garden and adjacent to the Rose Kennedy Greenway. Due to site logistics, the tight space and load limitations with the building sitting atop the 93 South tunnel, Orange and Green lines, the mast climbers were the most productive means of getting the work done, enabling six different trades to perform work on the exterior.

The majority of mast climbers were installed on 8 by 8-foot bases, made of wood cribbing and steel plates, as instructed by the engineers in order to accommodate load restrictions due to the tunnels below. Additionally, because of these load restrictions, at ground level Marr had to install P-units on the upper decks inside the building’s courtyard using spreader beams. While tight spacing required some units to be installed via tower crane, Marr Crane & Rigging also supplied 50-, 70- and 115-ton cranes to set up and dismantle units throughout the duration of the project. At this point in time, the majority of mast climbers and hoists have been dismantled. The project will wrap in spring of 2016.

One Canal 3.15

Over 200 tradespeople were trained to operate the more than 20 F and P units on-site.


Due to load restrictions, the P‐units on the upper decks inside the courtyard utilized spreader beams.




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