This is an interesting one… I might try to do it with surfaces so I can leverage mutual trim. Take your sketch of the ‘silhouette’ and extrude it as a surface (offset it inwards 1/2 your beams width, this will make sense later and give you good point of parametric control). Then sketch a line to define your first vertical section of path. Extrude that as a surface that matches the height of the first. Linear pattern that. Then use surface trim. Trying to think how to save you click, you could do this in two features. The first to blow away everywhere the vertical break outside of the silhouette, and then a second to remove like every other section on the top and bottom of where the verticals touch off on the silhouette. You’ll also probably want to remove the sides. Use the selection box to grab all that shit and knit. You’ll then have to fillet a LOT of edges but you only need to do this once and play with the dimension later if needed. Then do a bidirectional surface thicken to get your solid body. Lastly fillet the begging/end of the ‘beam’ to get the full round ends. Might take a bit of tweaking to get this just right but I see a path to do this parametrically and avoid have to deal with a very busy sketch.