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Unread 11-24-2020, 01:59 PM   #2
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Join Date: Aug 2020
Posts: 68
Maybe a small steel I beam could save you the middle basement column, leaving the basement fully open.

You can infill the tgi web with solid lumber that fits in the web height wise. SSI essentially each"beam" would be a sandwich with two lengths of solid lumber on the outsides and the tgi in the middle. Then you could add cross blocking in between.

You can also use steel strapping used to strengthen plates that get cut out for ductwork. About 1"width by 20"long, but with 16" screws holes for attaching to 16"centers. You could run a row of these perpendicular to the tgis, crossing the whole span screwed up to the underside to lock tgis together.

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