Yes, steel buildings need to be seismically upgraded but not very often.
If you have the right materials and can build good and put things together easily then yes you should be able to build steel buildings by yourself. But on the other hand if your not so strong or good with putting things together it might be a difficult task to build your own steel buildings. If that is the problem then you might need some help from others.
Iron is important because it makes steel for steel is made of 98% iron. It is also used in buildings, bridges and other objects that need to be strong.
Iron and steel (which is made from iron) are used to make thousands of things like buildings and cars.
If you are moving your current processor into the upgraded motherboard, your current cooling fan does not need to be upgraded.
Yes, it absolutely NEEDS to be upgraded!
You need an upgraded account.
we need ecofriendly buildings as a model to other buildings to become ecofriendly
you need an upgraded account first
Steel uses I shape that bear more shear load, that is why it is typically used for high buildings, while concrete is used for small building due to the low shear force it can bear. RCC will need more area as the number of floors get higher, the steel structure don't.
What buildings did "who" use? You need to give a subject in this sentence.
Steel
ïron and steel ïron and steel ïron and steel