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wpmason t1_je2c72j wrote

A shocking amount of construction is not level, square, or plumb. Close enough to where it can be unnoticed is the threshold typically used.

But there’s always a lot of levels, squares, plumb lines, and measurements happening. Also, lots of math.

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Ratnix t1_je2o02f wrote

I briefly worked at a place that made things like pre-built ceiling trusses. The tolerance for each board we cut to be assembled into the truss was 1/4inch. So if each board was 1/4in short, you'd be looking at a 1/2in gap at that particular joint.

So yeah, It's not necessarily going to be square when you have tolerances like that.

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Carthax12 t1_je4m1zt wrote

So much this. There is not a single right angle anywhere in my house, except where the contractors added a new wall to separate a room into two distinct rooms. ...and it looks wrong because it doesn't match the rest of the angles.

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