Rendering of Chase Center


Continued from page 11


work away from the students’ finals week. Te result? “Tere are seven or eight projects going on a stone’s throw from us, and we’re held up as the model,” McLamb said.


 Underground and Foundation Work. Crews excavated a total of 300,000 cubic yards of dirt from the site that was formerly a parking garage and, before that, a dump site from the 1906 earthquake. Existing soil conditions made the deep foundation challenging and required the team to drill 1,500 piles up to 150 feet deep, through bay mud, to anchor the foundation into solid rock. A cutoff wall helped contain the water table and keep the surrounding streets intact.


 Sequencing. Sequencing the work has been a challenge. Te critical path of the 22,000-item master schedule runs through the roof and then through the lower bowl seating into the event level. “Because it is an event-driven schedule, you have to find ways to overlap activities,” DeLong said. “We are working in all areas at the same time. Tere is a point in time


12 September/October 2018 California Constructor


Photo by Sophia Taft


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