it doesn't take much to deplete the supply chain. the new york new york hotel in las vegas used the entire country's supply of #10 rebar during construction. foundries don't just have 10 acres of steel components sitting in the yard waiting for someone to purchase it. they look at projected future sales and make just enough to cover that. they'll work an extra shift and cover what's being used by the line- there will be zero "shortages" from the construction.
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