Fire State Height is determined through fire resistance testing  under standards such as BS EN 1364-1, which specifies methods for assessing partitions during fire conditions. The results are classified under BS EN 13501-2, which evaluates integrity, insulation, and structural stability. Extended applications (EXAP) under BS EN 15254-3 or the UK National Annex may allow height adjustments based on tested performance and specific criteria.

The Siniat Drywall Manual summarises a selection of systems and their associated peformance, both the Cold State and Fire state heights are quoted under the Max Height column. Extract below from the Siniat Partitions section of the manual to show how this information is displayed.