Opt for fiberglass if there's any chance you'll be working with wiring or near power lines, since metal and dirty or waterlogged wood can conduct electricity, says Tom. And don't underestimate the maximum load capacity you need: Even if you weigh 150 pounds, carrying three 44s will put you over a 225-pound limit. A duty rating of I, IA, or IAA (250, 300, or 375 pounds, respectively) should do the trick for most home projects.
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