Willis Tower Skydeck Ledge cracked as visitors stood on the glass in the boxes on the 103rd floor. Looking down with nothing but glass all around them, the sound of the cracking sent the visitors scurrying off the glass they thought was unbreakable, according to NBC News Chicago on May 29.
One group of visitors heard the cracking and got out of the glass box ASAP. They notified the staff of what they heard.
The staff did see the cracks and the four boxes of The Ledge were closed for inspection.
The inspection found that the glass was “structurally sound” it was just the clear coating that was covering the glass that had cracked. That coating is used to protect the glass from scratching as folks walk on this Chicago attraction.
Skydeck Chicago remained open on Thursday while the four Ledge boxes were closed as they replaced the coating that had cracked. People that were standing in The Ledge boxes at the time the cracking sound was heard report that it was a scary situation, according to MSN News.
The boxes were closed temporarily for inspection and once the inspectors determined it was just the coating, the boxes on The Ledge remained closed so they could replace the coating. The glass enclosure box that jets out at the west side of the building was host to Alejandro Garibay, his brother and two cousins who were taking in the view.
It was shortly before 10 p.m. when they heard the cracking. Garibay called this a “Crazy feeling and experience” in an email he wrote to NBC News. The public relations firm that handles the Skybox and glass boxes insisted that the “structural integrity of The Ledge boxes were sound."
Brian Rehme, the spokesperson for the public relations firm that handles the attraction released a statement that included:
"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.”
People had no way of knowing this at the time the crack was heard. Garibay and his family said it was still a scary experience even though after the fact they found out it was just the coating that cracked. It wasn't just a small crack, the glass looked as if it had shattered. Coincidentally Garibay and his family had just been joking about The Ledge box glass giving way. Hearing that crack sent them running!