by Note that the third level is 0.5.
Level 1.5, level 2 minus 0.5 is 1, and level 3 minus 0.5 is 0.5, which is also the basis for memorizing this table.
The fire resistance rating is divided into level I, level II, level III and level IV.
Finally, the memory of combustion performance: we know that the combustion performance is divided into: non combustible, non combustible, combustible and flammable.
Fourth: the regularity of the walls related to personnel evacuation is also relatively strong.
If you don’t like words, you can watch the video version.
In terms of fire protection, the components of buildings are divided into the following 11 categories.
Third: the partition wall of the room is half of the floor.
The general rule is to reduce 0.5 for each level.
Don’t forget a special item: the floor of industrial buildings and the third level of evacuation stairs are 0.75, all with “floor character”.
Fifth: if the ceiling is burnt out, it will not have a great impact.
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If it falls down, it will basically not kill people.
The walls of the evacuation walkway are reduced by 0.5 for level 1, level 2 and level 3.
This large table can be divided into the following five sections to remember: First: roof load-bearing components, evacuation stairs and floor slabs.
It has the lowest fire resistance rating among all components.
In the table, except for the purple font, other components are non combustible.
Finally, the remaining non load-bearing exterior walls are special: the requirements for industrial non load-bearing exterior walls are relatively low, The value depends on the partition wall of the room (you can imagine that the partition wall of many industrial plants is a thin sheet of iron or glass; the requirements for civil non load-bearing exterior wall are relatively high, and the value is the wall of evacuation walkway.
The walls of the elevator shaft in the front room of the staircase are relatively important, level 1, level 2 and level 3 are 1.5, and the firewall is still, with a fire resistance rating of 3.
I believe many candidates have hated this “big cousin”.
Memory formula of combustion performance: hanging two or three, three pieces of work, three people, three partitions (in special cases, except that the roof bearing components of civil buildings are combustible, the rest are non combustible).
the level IV Examination is basically failed, so there is no need to remember.
Relatively special components include ceiling, roof load-bearing components and room partition wall, most of which are non combustible All are flame-retardant, and only the roof bearing components of civil buildings are combustible.
Add 0.5 on the basis of the floor; The column supports the beam, and its fire resistance rating is 1 higher than that of the beam (note that it is not 0.5 higher here); The bearing wall is the same as the column.
The value of level I and level II is 0.25 and that of level III is 0.15.
In short, these three components are people walking on them.
Click the blue character above to pay attention to the memory methods and formulas for the fire resistance rating and combustion performance of building components today.
The link is as follows: next time, we will bring you the memory method of relevant adjustment of building components.
Second: the beam, which supports the floor, must have a higher fire resistance rating than the floor.
