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5. Calculations and measurements
5.1 Conditions to be met
All calculations are based on normal air conditions:
temperature at 20 °C ;
density of 1.2 kg/m 3 .
Smoke extraction calculations for common horizontal corridors are carried out on a compartment basis. If the compartment is made up of several levels, the calculations are carried out for all the levels, but the smoke extraction system is activated for each level under the conditions specified in article GH 49 (§ 9.1 of
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Code
Article R. 122-9 of the Code de la construction et de l'habitation modified by decree no. 2009-1119 of September 16, 2009 – art. 2.
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