Months of seismic assessment work at Wairarapa College has revealed an "immediate risk" in its main building, says college board of trustees chairman Geoff Copps.
Trustees and Ministry of Education workers had completed an assessment of buildings at the school over the past several months, Mr Copps said.
"The results of this work have highlighted an immediate risk in the corridor of the main college building, the Sutherland Block," he said.
Contractors would start strengthening work at the start of the new school year, he said, to provide "an interim solution that will ensure that all users of the corridor are as safe as possible".
He said an overarching site plan would next year focus on "several other less critical seismic issues" at the school. "This current piece of work will provide for the safety of the school community while we work with the ministry to develop the long-term property plan to ensure that Wairarapa College has an environment to deliver the 21st century education our community demands," Mr Copps said.