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I had searched the store for rvt structure families, but unfotunately there is not a perfect store for these kind of components & families. So if anybody has suggestions or offers, please explain it below...
Under the 'Browse' section on the home page, you can change the category dropdown to 'Structural Framing' this may have some of the components you need. Its worth noting that Revit has a comprehensive selection of structural components build in.