Willis Tower Skydeck cracks under Chicago tourists

CHICAGO (NBC) — All four boxes of The Ledge, the 103rd floor tourist attraction atop Chicago’s Willis Tower, were closed Thursday morning for what an official said was a routine inspection, according to NBC Chicago.

The move comes hours after cracks appeared in what the official said was a coating designed to prevent scratches on the glass.

Skydeck Chicago is open today while the protective coating is being replaced,” said Brian Rehme, a spokesman for public relations firm FleishmanHillard. “We have temporarily closed the four Ledge boxes for routine inspection we hope to reopen them shortly.”

Rehme insisted the structural integrity of The Ledge boxes were sound.

Alejandro Garibay, his brother, and two cousins were in the glass enclosure that juts out of the west side of the building shortly before 10 p.m. when Garibay said they heard cracking.

“Crazy feeling and experience,” Garibay wrote in an email to NBC Chicago. Watch the NBC 5 NEWS at NOON to hear Garibay’s experience first-hand.

But Rehme said the visitors were never in any danger.

“This coating does not affect the structural integrity of The Ledge in any way. Occasionally, the coating will crack, as it is designed to in order to protect the surface of the glass,” Rehme said in a statement.

Still, it was a frightening experience for the family members visiting from California. Garibay said he and others were joking with staff about the strength of the boxes even before his group walked out into one of the boxes.

“They jokingly and confidently responded, ‘It’s unbreakable,’ so we just went on,” said Garibay.

While he and his family members were on the Ledge, Garibay said he heard cracking. They stepped off and alerted staffers.

“I walked them over so they could see and they were totally shocked and asked us to step away and then proceeded to start calling staff and techs and I don’t know who else. When we pulled our phones to start recording and take pictures, they asked us to leave right away,” he said.

When the tourist experience opened in 2009, engineers said the boxes were composed of three layers of glass each about one half-inch thick. They were built to hold five tons, officials said.

Another tourist attraction at the John Hancock Center, called Tilt, opened to visitors earlier this month.

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