The first home in the United States built with studs is generally believed to have been erected in 1833. The exact date that remodelers first began tapping on walls and wishing for an accurate way to locate studs is not recorded, but I'd suppose it was around 1834. Although today we still rely on a little guesswork when searching for hidden objects, we now have technical capabilities that those early builders and homeowners couldn't have imagined. Modern tools can find studs, plumbing, and live electrical wiring.
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