Posted on May 16, 2021 38
Such a familiar object as a nail rarely arouses interest. It would seem that what is unusual in this piece of iron? But in fact, this invention opened for humanity a new era in the construction industry, although in some countries traditional buildings are still built without their use. They can be very different, these little iron friends, and we’re going to tell you about them now.
Facts about nails
- Their first predecessors were nails made of bone, split wood and other improvised materials. They were used even primitive people.
- In many countries of Oceania, even today, nails are not used in the construction of traditional dwellings, which are prevalent in villages.
- Until the early 19th century, they were very expensive because they were made only by hand.
- The world’s oldest nail was found by archaeologists in Germany. It is about 7,000 years old and is made of wood.
- Birmingham blacksmith James Leiston made history by forging over 17 thousand nails by hand in 2 weeks.
- Basically, nails have a circular cross-section, but there are also square and even pentagonal.
- Studies have shown that the degree of adhesion of a nail to the surface, into which it is driven, in a pentagonal model, by 80 +% more than in the round.
- Nails with two flats, one above the other, are used to build temporary structures like scaffolding. They are hammered in only on the first nail head, so it’s easy to pull them out later.
- The most high-tech and expensive nails are not made of steel, but of fiberglass or carbon plastic.
- Surgical nails are made from polymerized lactic acid. After fixing broken bones with them, they are gradually resorbed directly in the body.