To exempt floor areas used for high-hazard industrial occupancies from the permission in the latter part of Sentence 3.4.2.5.(2) to space exits around the perimeter of a large building instead of the travel distance limits of Sentence 3.4.2.5.(1), on the basis that the growth of a fire will be so rapid that delays in evacuating are not acceptable, and the 25 m travel distance limit of Clause 3.4.2.5.(1)(a) is necessary.