Polyurethane fabrics can be manufactured in different thicknesses, depending on their intended use. For example, fabric used in diapers may be thinner than fabrics used for camping gear. Polyurethane fabrics are manufactured to feature a variety of characteristics. In situations where fuel contact is likely, the fabric can be made fire-retardant.
Oldest Wooden Building in the World. World's Oldest Wooden Building, is a five-story pagoda, part of HÅryÅ«-ji (Meaning: Temple of the Flourishing Law) Buddhist temple complex in Ikaruga, Nara Prefecture, Japan. The temple complex was completed in 607 AD.
The Pentagon was the world's largest office building for a while. The Vehicle Assembly Building, where NASA puts together its rockets, is pretty amazing. It was built in 1966 and was only supposed to last 10 years. It's still in use. Burj Khalifa is currently the tallest man-made structure in the world. You might find this list interesting: List of largest buildings in the world.