Isolated Masonry Piers 1. You may use hollow core concrete masonry units (concrete blocks) to build isolated masonry piers if the units are at least (â¥) 8 inches thick and not longer than (â¤) 3 times the unit thickness.
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Antonov AN-225 Mriya â The biggest airplane in the world, the Antonov AN-225 Mriya, arrived from its base in Kiev, Ukraine, at Vaclav Havel Airport in Prague, Czech Republic, on May 10. Click through the gallery to see more images of this one-of-a-kind flying machine.