As an acid-free substance, hardboard is a viable medium for family portraits. Hardboard, a heavy type of fiberboard made from mechanical pulp, graces homes in the form of siding and more recently as artists' canvas. Hardboard comes in various finishes, thicknesses and types to mimic coarse chipboard, plywood or real wood.
Boeing Everett Factory. Largest usable space by volume. This building claims to be the outright biggest of the worldâs biggest buildings due to its mammoth volume. Some of the greatest planes ever built are assembled here, such as the wide-body Boeing 747, 767s, 777s, and the new 787 Dreamliner.
Willis tower is the oldest building in the list and the construction of the building completed in 1974. It stands 442 meters or 1,450 feet high and composes 108 floors. Willis Tower is also the longest building that held the longest tallest worldâs record in the list. It held the record for a quarter decade. This tower is also the tallest building in north America.