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Planning to install a barn door on an opening as pictured here: https://imgur.com/a/T3ECDsT. the opening is 34.5 in x 92 inches. I plan to install a header across the opening and securing to 2x4s on both sides.

At the same time I want to not have an ugly opening on the top of the barn door and wanted to frame the opening properly. Looking at some examples looks like the general pattern is to have jack studs and headers https://imgur.com/a/asWpWRP. Since there would be no load on the header, is there an easy way to frame the door opening than having to build an entire frame?