U-Shaped Rear Airflow Plenum with Shelf Supports

Generate a parametric 3D CAD model of a U-shaped rear airflow plenum and shelf-support insert for a climate control cabinet. The main rear plenum body should be 15.7 inches wide, 1.25 inches deep, and 28.0 inches tall with a solid back face and an open front face featuring vertical airflow separator vanes spaced 2 inches apart. Extending forward from the left and right edges of this rear plenum, generate two solid side walls. Each side wall should extend 12.5 inches forward and be 28.0 inches tall, creating a U-shape. On the interior-facing sides of these two forward-extending walls, generate 7 horizontal shelf-support ledges on each side. These ledges must run the entire 12.5-inch length of the side walls to fully support a wire rack. Each ledge should protrude inward by 0.5 inches, have a vertical thickness of 0.375 inches, and be spaced evenly at a 3.875-inch vertical pitch, starting 2 inches from the bottom. Expose the total height, overall width, side-wall depth, and vertical rack pitch spacing as editable parameters.

Parameters

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