Drywall, gypsum, sheet rock, wall board, or whatever you call it, has to be installed by someone, so who better than a drywall installer? Some drywallers install the board and also tape and mud the joints, but others only hang the board.
When sanding, drywallers are exposed to a lot of dust, including silica in some cases, which they need to be protected from. The Center for Disease Control suggests using a vaccuum sander or pole sanding to reduce worker's exposure to harmful dust particles
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