Counselling was available for staff and students, she said.
A police spokesman said the death was not suspicious and the matter had been referred to the coroner.
In November 2012, a man in his 20s fell six stories to his death in the same building in front of a crowd of students preparing for exams.
Where to get help
• Youth services: (06) 3555 906
• Youthline: 0800 376 633
• Kidsline: 0800 543 754 (4pm to 6pm weekdays)
• Whatsup: 0800 942 8787 (noon to midnight)
• Depression helpline: 0800 111 757 (24-hour service)
• Rainbow Youth: (09) 376 4155
• The Word
• CASPER Suicide Prevention
If it is an emergency and you feel like you or someone else is at risk, call 111.