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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Mi-26 Halo. The Mi-26 (Nato reporting name: Halo) is a heavy transport helicopter produced by Rosvertol's aviation plant in Russia. The helicopter has a maximum speed of 295km/h, which makes it the world's fastest heavy-lift military transport helicopter. The Mi-26 made its first flight in December 1977.