A preliminary report indicates that a structural engineering miscalculation caused the new seating section in the Amon Carter Stadium to collapse, the director of athletics said Thursday.

Danny Morrison, athletic director, said Dallas-based architectural firm HKS Inc. is in charge of the structural engineering aspect of the project. HKS could not be reached for comment.

“A final report of the incident will be issued in the near future,” Morrison said, and deferred questions to the Physical Plant, who could not be reached for comment.

No injuries were reported when the structure on the south end of the stadium collapsed Feb. 8 at about 1:30 a.m.

Construction remains on halt, said Tracy Syler-Jones, associate vice chancellor for marketing and communication.

“A timetable for finishing the construction will be set once the investigation is complete,” Syler-Jones wrote in an e-mail.

The seating section was part of a $13 million upgrade of the athletics complex, including six luxury suites, a private club level and additional academic space for student athletes. Austin Commercial Inc. is in charge of construction.

“We continue to move forward with HKS and Austin Commercial,” Morrison said.

HKS lists among its projects the new Dallas Cowboys stadium under construction in Arlington and the American Airlines Center in Dallas.