Technical Booklet E Fire Safety·Page 151·Table 5.5
Table 5.5 - Multiplication Factors for Aggregate Notional Areas
This table provides the multiplication factors to be applied to unprotected areas based on their distance from the vertical datum, used to calculate aggregate notional area under Method 4.
Distance of unprotected area from vertical datum (m) | Factor
Not less than | Less than |
1.0 | 1.2 | 80
1.2 | 1.8 | 40
1.8 | 2.7 | 20
2.7 | 4.3 | 10
4.3 | 6.0 | 4
6.0 | 8.5 | 2
8.5 | 12.0 | 1
12.0 | 18.5 | 0.5
18.5 | 27.5 | 0.25
27.5 | 50.0 | 0.1
50.0 | No limit | 0
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