I am going to install a sliding door on the surface of a concrete wall and plan to frame the entire wall with 45x70 and attach it with nail plugs, then screw the track for the sliding door hardware into it. What I haven't quite figured out in my mind is how to make the connection to the floor where the door leaf runs into the wall (circled in red in the picture below), as I need a post or something similar and somehow attach it at the bottom so that I can then attach OSB/gypsum. Against the concrete wall, there are no problems on the other side of the door leaf, however.

I was considering if I could have a track for steel studs at the bottom that is 70mm, screw the panels directly into it, and skip the "post," but I guess the wall would become quite flimsy then?
https://www.bauhaus.se/skena-norgip...4ow1Rt4wq0PadAk6WFioFHGDxCXB4Q4YaAm0wEALw_wcB
 
  • Steel track for partition wall installation, used to support and secure structures; suitable for mounting sliding doors on concrete walls.
  • Close-up of vertical white panels at the bottom against a wooden floor, with a red circle highlighting a gap or connection point.
  • Cross-section diagram showing the installation plan for a sliding door on a concrete wall. It includes wooden studs, gypsum, OSB, and a steel track at the bottom.
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If you're going to place a batten at the edge against the door opening, you could place one on the other side and place cross battens between them.
Our pocket frame consisted of upright steel profiles with boards between on either side of the door leaf, where the boards are about 12x50 mm. Then OSB and plasterboard were screwed into those boards.

What are the measurements of the door?
 
I didn't really want to, but I went up a bit in timber dimension and built with double 45x45 studs with a 5 mm spacer instead, which provided 50 mm of space for the door to run in.
Anyway, here's the result: Hafa Rollock sliding door fittings with soft close.
 
  • Sliding door installation with Hafa Rollock hardware, double 45x45 timber studs, and soft-close mechanism, showing wooden frame and partially hidden door.
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