When the going gets hot, construction workers get nocturnal

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When the going gets hot, construction workers get nocturnal
Construction workers pour concrete at 1 a.m. in Chandler, Arizona

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When the going gets hot, construction workers get nocturnal
Construction workers pour concrete at 1 a.m. in Chandler, Arizona

A team of construction workers is pouring concrete onto the frame of a structure that will eventually become a wastewater treatment plant. It’s 1 a.m. on a clear night in the suburbs of Phoenix.

The temperature is still in the high 80s. But that’s way down from the area’s recent record high temperatures, up to 118 degrees.

Around here, it never really gets cool in the summer. That’s partly because Phoenix is such a big city that it traps the heat — a heat island.

But now in the middle of the night, it’s finally cool enough to start work.

“We try to pour and place and finish concrete when it’s below 90 degrees,” says Daniel Ward, the construction company’s project director.

From inside an air-conditioned trailer, he says there are things you can do to modify the concrete, like adding ice to cool it down. But it’s just best to work when it’s not as hot.

There are two reasons for working such strange hours. One is the concrete itself.

“It sets up too quick in the day with the sun on it,” says general superintendent Mike Wigness. “Here it’s a little bit slower and manageable.”

The other reason is making sure the workers don’t overheat.

“Everything out here is metal,” Wigness says. “I mean, the rebar, a lot of the forms — it gets hot. I mean, it burns your hands.”

But at this hour, he adds, laughing, “they’re under the natural shade of the moon.”[…]

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