BS 9999

摘要

BS 9999 is recognised by Local Authorities and other approved bodies as a complementary approach to that used within the Approved Documents. Consequently, BS 9999 gives fire resistance periods in Table 25 identical to those within Approved Document B if a building is simply considered in terms of height and occupancy. However, whereas the Approved Documents adopt a standard, prescriptive approach for all buildings, BS 9999 allows designers to use a risk-based approach to determine the fire resistance period for their building. It is presented in a logical and straightforward way that walks designers through the procedure step-by-step. It is therefore available for non specialists to use.