Despite the Romans' common use of lead pipes, their aqueducts rarely poisoned people. Unlike other parts of the world where lead pipes cause poisoning, the Roman water had so much calcium in it, that a layer of plaque prevented the water contacting the lead itself.
OMB definition, Office of Management and Budget: the division of the Executive Office of the President that prepares and administers the federal budget and improves management in the executive branch. See more.
Oriented Strand Board (OSB) is a man-made product created from wood bits, which are pressed and bound together by adhesive resin and glue. Itâs like the turkey loaf of building materials.This humble stuff is mostly used as a substrate during construction projects, leaving other materials to bask in the spotlight.on: Although some OSB comes with a water resistant covering, every subsequent cut opens up the new edges to moisture, making it prone to swelling when wet. It dries a lot slower than plywood as well. Make sure to waterproof every newly exposed section.