Interesting facts about doors.
It is difficult to imagine a house or apartment in which there would be no doors. When installing a wooden or metal door, it is necessary to take into account the features of its installation by a particular company, which will largely extend its service life.
Otherwise, you will have to repair the door, and this will entail unnecessary additional costs. And what doors installed earlier? Which of them were the most expensive, strange or heavy? This is what we will try to tell you now.
The oldest door model was found in England. There is no official information about its history, it is only known that the wood was used for its manufacture, which was cut down in the 19th century.
Lawrence National Laboratory, located in the American state of California, boasts a door whose weight is 312 tons. Despite the impressive thickness of such doors (2.5 m), one person can open them. The thing is that they stay on special loops, therefore, tearing them off is not any problems.
To save human lives, the fastest doors were developed, the closing interval of which is 30 msek. Agree, this is just progress in the world of doors manufacturing!
For the manufacture of the most reliable door, the weight of which 20 tons and thickness of 1 m, 7 layers of steel were used, and a special method was used for its welding, which allowed them to get the title of the most reliable.
The most terrible door is the door of St. Nicholas Cathedral (Slovenia). Although the rest of the door structures of this cathedral also do not differ in special beauty.