Nov 11, 2015 7:00 AM

Gallery: It Took 18 Hours to Pour the Foundation for San Francisco's Tallest Skyscraper

Boston Properties
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Seven pumps equipped with massive booms moved concrete from truck to foundation.
Boston Properties
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The pour took 18 hours.

Boston Properties
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Five million pounds of steel rebar reinforces the slab.
Boston Properties
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In the pit, workers guide the hose, vibrate air pockets out of the poured concrete, smooth poured sections, and supervise.

Boston Properties
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Each concrete truck carries 13 cubic yards of concrete. In all, the Salesforce Tower pour used 1,300 trucks.
Boston Properties
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Finishers \*ahem\* begin by leveling concrete in eight foot sections using a 2x4.

Boston Properties
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Project manager Michael Tymoff describes organizing a pour as a ballet. Routing traffic around the job is just as important as directing the right concrete truck to the right pump.

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Luke Larsen

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Fernanda González

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