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    Benchwork for an Ho helix or "Doughnut Delema"

    Happy new year! Can someone tell me the best way to design benchwork to support an HO helix, which is basically a doughnut table! I would like to be able to shimmy up inside the doughnut hole for repair work. I am using L girder benchwork. The helix is for two levels about 18 inched...




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