Assertion: tire's hoop | /r/MadeOf | a variety of materials
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text: Hoop houses are constructed with a series of large hoops made of a variety of materials – from PVC piping and rebar stakes to saplings and bedsprings, fiberglass rods, rubber tires, metal, and more – that are covered with greenhouse plastic, which is stretch snugly over the hoop frame and fastened to baseboards.