JumboBuc
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From linked B&T article posted above:
B&T said:The tower is supported by 350 pilings driven up to 220 feet below ground, including 30 feet of bedrock. Construction manager John Moriarty & Assoc. needed to request a pile hammer driving machine from the mid-Atlantic region that was powerful enough to complete the 14 miles of piling work, President John Moriarty said.
“It was the hardest pile-driving job we’ve ever done in Boston,” he said. “We’re lucky because we have terrific geotechnical engineers in McPhail Assoc. (of Cambridge).”
Is it just me, or are we seeing more talk about the foundations of these buildings than we used to? I don't recall this sort of thing coming up in press and marketing materials before, but now I've seen it here regarding the Pierce and here regarding the Four Seasons tower. I think we can thank the SF MT for putting this on the minds of prospective buyers and the public at large.