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A dozen concrete pillars will be removed from the courtyard of Edison Preparatory School after one of the massive structures landed on a student lying in a hammock earlier this week.

The student, a senior on the school’s pom squad who had attached a portable hammock to the pillar that struck her, was taken to a hospital about 3:45 p.m. Wednesday with a broken pelvis and both legs broken, Tulsa Public Schools spokesman Chris Payne said.

A structural engineer examined the pillars Thursday and recommended to district officials the columns be removed, Payne said.

The courtyard where the pillars are located has been cordoned off, and they are expected to be pulled out in the coming weeks.

“They’re probably going to have to do it in the evenings and on the weekend because I have not seen (the pillars) personally, but I hear they’re pretty substantial,” Payne said.

The accident happened after the student and a friend tied a hammock to two of the columns.

Payne said the details are not completely clear, but that one of the columns collapsed onto the girl while she was lying in the hammock.