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The image shows a load supporting beam in a basement. The plan is to attach a wall frame (depicted by green colored lines) and a soffit (red colored lines) to the load supporting beam. A very basic question: Is it OK to fasten these structures to the existing supporting beam? Can the fasteners (3 inch screws) (1) damage the supporting beam or (2) can the supporting beam cause problems down the road to the new wall and soffit by thermal expansion movement?enter image description here

rehcsif
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Yes it is ok to add your wall and box in the vent lines. This is is very common, in fact.

isherwood
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Ed Beal
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