A building control officer is disquieted by the quality of a design submission and the approach of a fire engineer in assessing structural fire matters. The reporter is a building control officer and they review fire safety designs. This report is about a submission for a project in which an existing building is being incorporated into a large new building. The reporter was alarmed because the expected structural fire performance of the existing structure, or any fire resistance rating, was unknown, and yet this issue was left unaddressed by the designer. In contrast, the requirement in technical guidance for the new development was a fire-resistance rating of 120 minutes, in terms of resistance (R), integrity (E) and insulation (I).
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