Classification and fire protection requirements of residential and commercial composite buildings (with true case title)


5.

2) Existing problems: the oil fired boiler room is set on the lower second floor.

The building height of the building is 50.6 + 0.6 = 51.2m.

When general commercial buildings are attached to the lower part of the residence, the building is characterized as a public building.

3.

Reason: when the children’s amusement hall is set in a building with class I and II fire resistance rating, it shall be arranged on the first floor, second floor or third floor.

The residential part and commercial service outlets shall be completely separated by a fire partition wall with a fire resistance limit of not less than 2.00h and without doors, windows and openings and a 1.50h non combustible floor slab.

Reason: class a fire doors shall be set between cinemas and other areas.

Reference answer 1.

2.

Shuttering Magnet

What is the building height of the building? It is classified according to code for fire protection design of buildings (gb50016).

2) Existing problems: the fire rescue site is arranged at intervals along the long side in the South and the short side in the east of the building bottom, with an interval of 25m.

It is a kind of high-rise public building.

3.1) existing problems: Class B fire doors are set at the connection between the cinema and other areas.

The distance of indoor stairs can be calculated as 1.50 times of its horizontal projection length.

Residential buildings with commercial service outlets 1.

Each partition unit in the commercial service network shall be separated from each other by a fire partition wall with a fire resistance limit of not less than 2.00h and without doors, windows and openings.

Indoor and outdoor fire hydrant system, wet automatic sprinkler system, automatic fire alarm system, smoke control and smoke exhaust system and fire extinguisher are set in the shopping mall in the building according to the specification requirements.

Commercial service outlets refer to shops, post offices, savings offices, barber shops and other small business houses set on the first floor or the first floor and the second floor of residential buildings, and the construction area of each separation unit is no more than 300 m2.

4.

Reason: after the automatic sprinkler system is set in the fire compartment of multi-storey public buildings with class I fire resistance rating, the maximum allowable building area of the fire compartment shall not be greater than 5000m2 and shall be divided into at least two fire compartments.

The indoor floor elevation of the first floor of the building is ± 0.000m, the outdoor floor elevation is -0.600m, the flat roof surface elevation of the shopping mall is 18.6m, the flat roof surface elevation of the residence is 50.6m, and the top elevation of the parapet is 50.9m.

The straight-line distance from any point in each separation unit to the nearest exit directly to the outside shall not be greater than the maximum straight-line distance from the evacuation door of other multi-storey buildings located on both sides or at the end of the bag walkway to the nearest emergency exit in table 5.5.17 of code for fire protection design of buildings gb50016.

2.

The fire protection requirements of the two are very different.

When the building area of any floor of each partition unit is greater than 200m2, two emergency exits or evacuation doors shall be set on that floor.

A closed staircase with external windows and natural ventilation is set at the four corners of the mall.

The emergency exits and evacuation stairs of residential part and non residential part shall be set separately; The above ground garage serving the residential part shall be provided with independent evacuation stairs or emergency exits.

Point out the problems existing in the plane layout of the building, and briefly describe the reasons.

The safe evacuation, fire compartment and indoor fire-fighting facilities configuration of residential part and non residential part can be implemented according to the respective building height and in accordance with the provisions of this code on residential buildings and public buildings; Other fire protection design of the building shall be implemented in accordance with the provisions of this code on public buildings according to the total height and scale of the building.

The service function of general business is not limited, and the business function is small business houses such as shops, post offices, savings offices and barbershops, and the number of floors is not limited to the first floor or the first floor and the second floor; Its building area is not limited.

The decoration of the shopping mall in the building adopts non combustible and non combustible materials.

Each underground floor is divided into fire compartments according to the standard requirements.

Existing problems: the first floor of the building is divided into one fire compartment.

Reason: the high-rise building shall be separated from the shopping mall part and the residential part by a non combustible floor with a fire resistance limit of not less than 2.00h.

The residential part and the shopping mall part are separated by firewall and non combustible floor slab with fire resistance limit of 1.50h.

High rise public buildings with a building height greater than 24m.

2.

The edge close to the outer wall of the building is 7m away from the outer wall of the building.

Fire protection requirements for residential and general commercial public buildings.

Correct practice: control the distance between the rescue site and the external wall of the building within 5m ~ 10m.

Point out the problems existing in the fire fighting and rescue facilities of the building, and give the correct practices.

The emergency exits and evacuation stairs of the residential part and commercial service outlets shall be set separately.

Other fire protection requirements are shown in the table below.

Point out the problems existing in the safe evacuation of the building, and briefly describe the reasons.

A circular fire lane with a width of 6m is set around the building.

The fourth to sixteenth floors are unit houses, with a construction area of 1400m2 per floor.

The first floor of the shopping mall is equipped with a hall, the second floor is equipped with a number of cinema audience halls with a construction area of 450m2, the third floor is equipped with a video game hall, the evacuation door of the hall is equipped with a two-way spring door, and the fourth floor is equipped with a children’s amusement hall.

A civil building has 16 floors above the ground and 2 floors underground.

The fire rescue site is arranged at intervals along the long side of the ground on the south side of the building bottom and the short side on the east side, with an interval of 25m.

Class B fire doors are adopted for the doors of the residential part, each unit is a fire compartment, and two closed staircases are set.

3) existing problems: there is a children’s amusement hall on the fourth floor of the building.

Between residential and non residential parts, fire partition walls with fire resistance of no less than 2.00h and no doors, windows and openings and 1.50h non combustible floor slabs shall be used for complete separation; When it is a high-rise building, it shall be completely separated by a firewall without doors, windows and openings and a non combustible floor with a fire resistance limit of not less than 2.00h.

1.

When a commercial service network is attached to the lower part of the residence, the building is characterized as a residential building.

The first floor of the building is divided into one fire compartment, and each floor from the second floor to the fourth floor is divided into two fire compartments.

Point out the problems existing in the fire compartment of the building, and briefly describe the reasons.

The first to fourth floors are shopping malls, with a construction area of 6200m2 per floor.

High rise residential buildings with a building height greater than 27m.

2.

4.1) existing problems: the distance from the east side of the fire rescue site to the external wall of the building is 11m.

The distance from the South fire rescue site to the building is 6m, and the distance from the East site to the outer wall of the building is 11m.

According to the above materials, answer the following questions: 1.

In the qualification examination for class I registered fire engineer, we often encounter buildings with commercial use functions attached to the residence, buildings with commercial service outlets at the bottom of the residence, and buildings built together with other use function buildings.

The staircase door adopts a two-way spring door that can block smoke.

The first basement of the building is equipped with catering places, supermarkets and equipment rooms, and the second basement is equipped with garage, fire water pump room, fire pool, oil boiler room, power transformation and distribution room (dry type), etc.

Reason: the oil fired boiler room should not be arranged on the upper, lower or adjacent floor of densely populated places.

▲ public buildings jointly built by residence and general business ▲ residential building case prediction with commercial service outlets [case prediction] fire prevention case analysis of commercial and residential buildings jointly built.

Other matters in the fire protection design of the building comply with national standards.

4) Existing problems: firewall and noncombustible floor with fire resistance limit of 1.50h are set at the separation between residential part and shopping mall.

How to distinguish them? First of all, let’s clarify what is a commercial service network.

Different areas in the mall are separated by 2.00h fire partition walls, and the connecting part is equipped with class B fire doors.

3.

The fire compartment is separated by fire rolling shutter and firewall with fire resistance limit of 3.00h.

Correct practice: for buildings with a building height greater than 50m, the fire rescue site shall be arranged continuously..

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