Lift lifts with air leaks
This case refers to lifts located in stairwells, with exits directly to the stairwells. In this case, the movement of air occurs in the volume of the stairwell, which must meet the relevant fire requirements. In order to avoid traction in the mine, it must be tightly protected by fireproof materials with a fire resistance limit of at least 0.5 hours. Comments on the application of the instructions of this chapter.
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The requirements set forth in this chapter are medium and aimed at rational security of people, t. e. suitable for most cases encountered in practice. With the final choice of fire measures, it is necessary to proceed from the following general reasons: 1) the fire resistance of individual elements of the building should be equivalent. So, there is no need to increase the cost of some designs in the case when fire can spread in other ways, or when, with a non -combustible building, its strength and stability are not provided with the protection of the metal frame, as well as in cases where the building consists of non -combined structures, but with cladding, with cladding, but with cladding contributing to the rapid spread of flame over the surface; 2) For some parts of the building, fire measures can be provided to a certain extent through other measures. So, for example, the distance from the most remote residential premises to the outer exit can be slightly increased provided that all partitions in the evacuation paths are inconsistent, and special devices will ensure non -humility and not the aggravation of evacuation routes throughout their length. For the possibility of quick intervention of firefighters, the possibility of entering the building and installation of fire truck stairs should be allowed.