When to use Structural Fire Standards

摘要

In most instances, the performance of components and systems in fire is demonstrated through the standard test. However, there are occasions where the designer may wish to consider using structural fire standards (BS 5950-8, BS EN 1993-1-2 or BS EN 1994-1-2) to reduce the fire protection required to achieve the fire rating. The limiting temperature method allows the designer to assess the need, or otherwise, for fire protection by comparing the temperature at which the member will fail (the limiting temperature) with the temperature of the hottest part of the section at the required fire resistance time (the design temperature). In BS 5950-8 this is done via a set of prepared tables. If the limiting temperature exceeds the design temperature, no protection is necessary.