Table 4.2: Minimum periods of fire resistance

Table 4.2 Minimum periods of fire resistance Purpose group of building | Minimum period (minutes) for elements of structure and other components of the building forming part of Basement storey+ including floor over | Ground or upper storey Depth (m) of basement: More than 10 | Not more than 10 Height (m) of top floor above ground in building or separated part of building (1): Not more than 5 | More than 5 not more than 11 | More than 11 not more than 18 | More than 18 not more than 30 | More than 30 1 Residential (dwellings) – (a) flats (i) not sprinklered (ii) sprinklered(3) (b) and (c) dwellinghouses | 90, 90, Not relevant | 60, 60, 30* | 30*, 30*, 30* | 60(2)**, 60(2)**, 60@ | Not(4) Permitted, 60**, 60@ | Not (4) Permitted, 90**, Not relevant | Not (4) Permitted, 120**, Not relevant 2 Residential – (a) institutional(5) (b) other residential(6) | 90, 90 | 60, 60 | 30*##, 30* | 60, 60 | 60, 60 | 90, 90 | 120#, 120# 3 Office – not sprinklered, sprinklered(3) | 90, 60 | 60, 60 | 30*, 30* | 60, 30* | 60, 30* | 90, 60 | Not permitted, 120# 4 Shop and commercial – not sprinklered, sprinklered(3) | 90, 60 | 60, 60 | 60, 30* | 60, 60 | 60, 60 | 90, 60 | Not permitted, 120# 5 Assembly and recreation – not sprinklered, sprinklered(3) | 90, 60 | 60, 60 | 60, 30* | 60, 60 | 60, 60 | 90, 60 | Not permitted, 120# 6 Industrial – not sprinklered, sprinklered(3) | 120, 90 | 90, 60 | 60, 30* | 90, 60 | 90, 60 | 120, 90 | Not permitted, 120# 7 Storage and other non-residential – (a) any building or part not described elsewhere – not sprinklered, sprinklered(3) | 120, 90 | 90, 60 | 60, 30* | 90, 60 | 90, 60 | 120, 90 | Not permitted, 120#