On Oct. 13, Shimmick Construction Co. successfully completed the 36-in.-dia pilot pile-casing installation at San Francisco’s Millennium Tower, proving the efficacy of the initial step of a less-disruptive construction method proposed to allow the resumption of the paused foundation fix at the ailing 645-ft-tall residential condominium.
Accelerated settling and tilt—caused by the very perimeter pile upgrade intended to correct some 17 in. of building settlement—ceased after Aug. 20, when Ronald O. Hamburger, the engineer-of-record for the $100-million foundation upgrade, halted the work.