Generally, how to go up to the roof, why the taller buildings are sealed, and it is the same in seve

Generally, the roof can not go up, that is because the people in the community are for safety, do not let people run on the roof, because the average person will not go to the roof, if he does not seal, in case of a situation, it is not easy to do the property, so the roof must be sealed, especially in the community, every household has its own door, Ruru, the roof is a public area, in case of a situation, or there is a thief hiding one, this responsibility is not easy to bear, Because each house has at least its own balcony and vents, which can be lit, so the roof will not let anyone go, besides, his own insiders want to go to the roof, there must be a key, like every floor, there must be a caretaker, there must be a management system.

Each floor has its own key to its own home, and the insiders will not wear it indiscriminately, and sealing the roof is to prevent people from outside the building from coming in and running upstairs, and no one is willing to take care of accidents.

In general, there are stairs leading to the roof, but for safety reasons, the property management company usually seals the stairs and only opens them when needed.

There are stairs on the top of the high-rise buildings to go up, but most of the time the property will close the fire door on the top floor, just to avoid accidents for children or curious people to go up, why do you always want to go to the top floor?

Generally, the roof of the building can go up from the elevator shaft, but the higher buildings are sealed, and it is the same for several communities, because the safety exit of the elevator shaft on the higher floor will be sealed, for safety reasons.

No way?! For high-rise and small high-rise buildings, the stairwell must be able to go up to the top of the building, and the door shall not be sealed or locked. - This is a firefighting requirement, for escape.

No, there are stairs leading to the rooftop. It is usually sealed. Realty management.

Generally, you need to use a ladder to go up to the roof. Because it's not safe to go up a little higher, so it's going to be sealed, and the house is basically built like this, and it's the same when you go to several communities, so it's not surprising.

Yes, now most of the high-rise roofs are sealed, one is a safety hazard, the top is not safe, only professional maintenance personnel can go up, I think the roof of the high-rise building is sealed, it is also beneficial.

Generally, the roof of the community can go up, but there are obstacles, especially multi-storey, are equipped with skylights, for safety, some units also lock the skylights, so that people in addition to this unit can go up, others can not go up.

Basically, you can go up, including the old community, and you will leave an opening to take a ladder to go up.

The roof of the general residential building is not allowed to go up, because it is more dangerous.

Yes, but it's usually locked.

The roof is full of elevators, water tanks, solar thunderbolts and other equipment, just go on, good at night to steal? Or go and destroy the equipment. There are so many sand sculptures. Only maintenance personnel, professionals can go up, and they must be locked at ordinary times.

There is a one-story building in the community, and they are sealed inside and outside the house, so they should still leave a door, if all of them are sealed, it can only mean that this family is not inhabited.

It is sealed inside and out, indicating that this family has a strong sense of prevention and may not plan to live here.

This can be consulted with the property management to understand the situation, because the property management is clear.

The platform door to the top floor is not lockable. The roof is a fire escape, and the roof escape door is one of the important facilities for fire safety.

According to the Code for Fire Protection Design of High-rise Civil Buildings, the public evacuation doors of high-rise buildings should be opened in the direction of evacuation, and side sliding doors, hanging doors and turnstile doors should not be used. Evacuation doors in crowded places to prevent outsiders from entering at will should be equipped with devices that can be quickly opened without using any equipment such as keys in the event of a fire, and a reminder for use should be set up in a conspicuous position.

According to China's "Fire Protection Law" and other regulations, the roof is a fire escape, and the roof escape door is one of the important facilities for fire safety.

Article 60 of the Fire Protection Law stipulates that if a unit violates the provisions of this law and commits any of the following acts, it shall be ordered to make corrections and shall be fined not less than 5,000 yuan but not more than 50,000 yuan:

1) The configuration and setting of fire-fighting facilities, equipment or fire safety signs do not conform to national standards or industry standards, or are not kept intact and effective;

2) Damage, misappropriation, or unauthorized dismantling or dismantling of fire-fighting facilities and equipment;

3) Occupying, blocking, or closing evacuation passages or safety exits, or engaging in other conduct that impedes safe evacuation;

4) Burying, occupying, or blocking fire hydrants or occupying fire spacing;

5) occupying, blocking, or closing the passage of fire trucks, obstructing the passage of fire trucks;

6) Setting up obstacles on doors and windows in crowded places that affect escape and fire fighting and rescue;

7) Failure to take timely measures to eliminate fire hazards after being notified by the fire and rescue agencies.

Where individuals exhibit any of the conduct in items (2), (3), (4), or (5) of the preceding paragraph, they are to be given a warning or a fine of up to 500 RMB. Where there is conduct in items (3), (4), (5), or (6) of the first paragraph of this article, and corrections are refused after being ordered to make corrections, compulsory enforcement is to be carried out, and the costs required are to be borne by the violator.

Can the residents on the top floor lock the lock of their own floor It is not a door to the top floor You can go up to the top of the stairs The people downstairs come up to dry their clothes There are too many people back and forth There is no privacy and it is not safe Can you lock the door of your own house Let them go up the stairs.

Regarding the high-rise "Fire Protection Law", the door of the platform leading to the top floor can be locked, and it should be lockable.

According to Article 60 of the Fire Protection Law, it is clear that if it cannot be locked, it is illegal to lock itArticle 60 If a unit violates the provisions of this Law and commits any of the following acts, it shall be ordered to make corrections and shall be fined not less than 5,000 yuan but not more than 50,000 yuan;

1) The configuration of fire-fighting facilities and equipment or fire safety signs does not conform to national standards and industry standards, or is not kept intact;

2) Damage, misappropriation, or unauthorized dismantling or dismantling of fire-fighting facilities and equipment;

3) Occupying, blocking, or closing evacuation passages or safety exits, or engaging in other conduct that impedes safe evacuation;

4) Burying, occupying, or blocking fire hydrants or occupying fire spacing;

5) occupying, blocking, or closing the passage of fire trucks, obstructing the passage of fire trucks;

6) Setting up obstacles on doors and windows in crowded places that affect escape and fire fighting and rescue;

Normally closed, resolutely can not be locked.

If there is an attic on the roof, there is no fire escape?

The entire roof platform door of the old community in Changsha City (Longsheng mobile phone market) was rudely locked by the community, how to complain?

This type of drain should not be abolished. To seal, fill only with foam.

The hole was haired from the bottom to the top, and then plugged it up with cement slurry and waterproofing.

1. There is no partition between the living room and the door of high-rise residences, and the outside gas directly enters the residence, while the yang energy in the house escapes, which is not livable.

2. Don't face the stairs at the door, and there is a lot of attention to the door of the high-rise, because the gate is a place where a family enters and exits, and the feng shui of the gate will directly affect the fortune of the entire residence and people. Some houses design the gate to face the staircase, whether the staircase is up or down, it will cause the air flow to not converge, let alone gather wealth, this phenomenon is called the pattern of wealth withdrawal in Feng Shui. It is not conducive to the development of the family's financial fortune and is easy to cause a situation where the income cannot make ends meet.

3. The number of windows should not be too much, and the number of windows is not as much as possible, as long as it can meet the indoor ventilation and lighting. Compared with low-rise residences, the air circulation of high-rise buildings will be relatively smooth, so such feng shui residential windows should not be too many, too many will produce strong air flow, resulting in unstable aura, resulting in the phenomenon of feng shui that consumes money.

Because the high temperature softens the supporting steel bars in the concrete, it is difficult to support the huge gravity, forming a chain reaction that collapses from top to bottom.

In the 911 terrorist attacks, the protective insulation panels on the surface of the steel frame of the World Trade Center in New York fell off after the hijacked planes of the Twin Towers in New York were hit. The steel structure of the twin towers was thus completely exposed to the fire, which at that time was close to the 500 degrees Celsius steel softening point.

Both buildings withstood the effects of the impact for some time after the plane collided. The North Tower of the World Trade Center lasted 122 minutes before collapsing, while the South Tower lasted 57 minutes. During this time, the main structure succeeded in dispersing the forces to the other support points, despite the destruction of the building's external supports.

Immediately after the plane crashed into the building, the huge fireball consumed 10000 of 1 3 gallons of fuel per aircraft, but this did not cause much damage to the building itself. However, the remaining fuel continued to burn and ignited furniture, appliances, paper, and airplane cargo inside the building within minutes, ultimately leading to the catastrophic collapse of the twin towers.

The entire building collapsed in the 911 incident.

Causes of the collapse: 1) The part of the plane hit in the 911 incident is the middle of the building, so the upper part of the building will inevitably collapse, and the weight brought by the collapse of the upper part of the building will directly destroy the structure below the building.

2) The building was built with an all-steel structure, and the heat energy generated by the aircraft in the building quickly reduced the fire resistance of the steel structure and melted the steel structure itself, and the building would collapse without support.

3) The building of the World Trade Center is not wide, like a tall cuboid, and the upper part is hit hard, and the whole is easy to collapse. In contrast, the Pentagon is very wide and not tall, so it only partially collapsed.

The 911 incident plane hit not the roof but the middle of the building, which had a fatal impact on the building, which, combined with burning and **, eventually led to the collapse of the building.

According to relevant reports, the planes that hit the World Trade Center were carrying 30 to 50 tons of fuel, and when the gasoline was burned, all the materials around it were burned. After being burned, the building lost its support, and the building above fell onto the next floor. The difference in the coefficient of dynamics between an object "smashing" on another object and quietly "put" it on an object is very large, about 10 times the difference.

After smashing down, the building below could not support such a large weight, so it was smashed down layer by layer.

We can imagine the process of smashing. If something hits a piece of soft dough, the dough develops a plastic deformation that can absorb a lot of pressure. But what fell from the World Trade Center was smashed on the floor slab of the next floor, and the floor slab was supported by steel bars, so it could not be plastically transformed.

So the pressure it can absorb is very limited. Therefore, the floor slabs of the World Trade Center are smashed down layer by layer, and the weight is getting bigger and bigger, the speed is getting faster and faster, and the kinetic energy is getting bigger and bigger. Therefore, as soon as the building above hits the first floor, it indicates that the entire building must collapse completely.

And the floor slabs are smashed down layer by layer, and there is no room for survival, so the possibility of survival is zero. The picture below shows the moment when the building collapsed.

I didn't want to answer, but after reading it, many people praised the previous bullshit analysis, so I had to say a few words. Let's put it this way! The sturdiness of the World Trade Center Building is at least about the same as that of the cement poles in the countryside, you use a small excavator to dig a bucket to hit the cracks in the upper part of 1 4 hits, and then use three gasoline blowtorches to increase the fire, what will be the result of burning for a year?

At most, the steel bar where it was hit was burned! However, the concrete will not necessarily be crushed within an hour, let alone collapse downward, and will not collapse in one mode at the same time. So,**is**, don't tell me anything big.

I don't understand it anymore when I say it to this extent, it's really hopeless! The beauty of self-directed and self-acting will eventually be exposed! Let time tell!

Whoever talks about the big truth is a big **.

First, the part of the collision is not the roof you said, but the middle is up, about 3 5 height position;

Second, the kinetic energy brought by the high speed of the aircraft directly penetrates the structural part of the building, and if the structure of the building is damaged, the above part of the building will collapse;

Third, the building is an all-steel structure, and the heat energy generated by the aircraft in the building can quickly reduce the fire resistance of the steel structure and melt the steel structure itself, coupled with the weight of the collapse of the upper part of the building, which directly destroys the structure below the building;

Fourth, the collapse of the building is not a matter of quality (the United States built a 100-story steel structure building in Chicago a hundred years ago, and this is difficult to achieve in China and even in other countries around the world), but the energy of the destruction is huge and unstoppable.

The high-rise building is a steel structure, and the steel is softened by heating, and the supporting force is not enough, so it collapses.

**The steel structure was burned, and the roof was smashed down and collapsed.

**Hit the roof of the building, which is the upper part of the building. The plane quickly collided with the building, the strong impact force and shear force caused the building structure to be seriously damaged, many of the load-bearing parts that supported and pulled the building were destroyed, and the fuel carried by the plane burned violently in the building after the collision, and the remaining load-bearing structure was burned or burned to a great extent, and as a result, the building above the place where the plane was hit collapsed downward, and the huge inertia was unable to bear the lower floor, so the tragedy happened.