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 (Depth (m) of basement: More than 10 / Not more than 10) | Ground or upper storey (Height (m) of top floor above ground in building or separated part of building: Not more than 5 / More than 5 not more than 18 / More than 18 not more than 30 / More than 30) 1 Residential (dwellings) – (a) flats (b) and (c) dwellinghouses | 90 / Not relevant | 60 / 30* / 30* / 30* | 60(2)** / 60@ / 90** / Not relevant / 120** / Not relevant 2 Residential – (a) institutional (b) other residential | 90 / 90 | 60 / 60 | 30*## / 30* / 60 / 60 / 90 / 90 / 120# / 120# 3 Office – not sprinklered / sprinklered(3) | 90 / 60 | 60 / 60 | 30* / 30* / 60 / 30* / 90 / 60 / Not permitted / 120# 4 Shop and commercial – not sprinklered / sprinklered(3) | 90 / 60 | 60 / 60 | 60 / 30* / 60 / 60 / 90 / 60 / Not permitted / 120# 5 Assembly and recreation – not sprinklered / sprinklered(3) | 90 / 60 | 60 / 60 | 60 / 30* / 60 / 60 / 90 / 60 / Not permitted / 120# 6 Industrial – not sprinklered / sprinklered(3) | 120 / 90 | 90 / 60 | 60 / 30* / 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 / 120 / 90 / Not permitted / 120#