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I picked up Vinyl plank flooring to swap out the carpet in my living room. The second I removed the carpet I noticed high spot that appears to run the width of the living room. When I placed the 6.5ft level over the high spot my level teeters. It appears to run along the joist based off of the nail pattern.

Looking online I came across an article that provided some guidance for fixing this with a planer.

https://www.oneprojectcloser.com/level-an-uneven-crowning-subfloor-by-planing-sanding-joists/

The example shows how to fix what appears to be a 2x10 or 2x8 beam. From what I can see from the small portion of subfloor that I removed it looks as though I have some sort of joist construct that looks similar to Pryda Longreach Truss Joists. Not sure if I can or should plane this joist down since there's not much meat to it.

Also if I can plane it down a small amount I ran into another issue. The joists don't all run the same direction. The joist that is causing the issue is the last joist that runs width wide and the following side it appears to run perpendicular. Trying to figure out how I can determine an even level when planing that joist.

Thanks and sorry for being so long winded. Ken

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Not being a structural engineer I offer this advice at your own expense...I would first remove 5/8" or 3/4" subflooring in desired area.then I would set up a pls laser system a couple of feet above the floor and measure back down to ends of each floor joist and snap chalk lines to verify the crown in each joist...if its showing it needs to be planed more than a quarter inch I would drop in a new joist beside the one you're intending on planning and glue and screw to it..make sure the ends of your new joist is resting on top of walls or foundation or piers on both ends.. it's a lot of work but professional...

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Prada joist systems are extremely flexible. Most are designed with a built-in camber in anticipation of deflecting to be “flat”.

I’d contact the local manufacturer and have them calculate how much load could be added to the truss joists to bring them to “flat”. You may just need to add some dead load (extra layer of plywood) to solve your problem.

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