The curvature of the lip is a matter of personal choice.
Floor slants 1 4 inch.
Except for that slope the floor itself might be flat.
Your probably best leaving yourself about 1 4 inch and adding a bit more adhesive at the entry if necessary.
Probably more like 1 8 3 16.
Use a router with a 1 4 inch roundover bit to round it significantly.
Fit the lip of the t molding over the scrap wood facing the edge of the table.
But you can always bring things up rather take away material.
Basically they are saying if a floor is sloping over a 1 2 to 1 inch in twenty feet then there is concern.
Floor slopes and slants are common in old houses.
However to answer the question i would say that a 1 2 x1 2 notch trowel would leave less than 1 4 inch of adhesive.
Install plywood subfloor.
Follow this by a strip of 1 2 inch plywood at the 1 2 inch mark a strip of 3 4 inch plywood at the 3 4 inch mark and two layered strips of 1 2 inch plywood at the 1 inch mark.
Use screws to secure the leveling strips to the floor every 16 inches.
If the floor slants irregularly cut strips that bridge the cap at each floor joist.
Use an orbital sander with 100 grit sandpaper to round it lightly.
For example a floor that extends 4 feet away from the drain should have 1 inch of overall slope.
Often floor lampshades are in the range of 16 to 20 or more width.
Nearly all will say that if a floor slopes 1 and 1 2 inches in twenty feet or more that there should be further investigation.
Mix up some concrete mix in the mixer.
For rooms that have a general slope the issue may be foundation problems that require the assistance of a.
To replace a shade for a floor lamp consider that floor lamp shades need to generally be larger due to the height of the lamp.
Screw the strips into the floor joists or subfloor.
That is quite a large area for the floor to have dropped but if the drop is 3 4 to 1 inch deep i don t think it is a big problem and you and your wife can breathe easy.
Floors that slope 2 or 3 inches in 20 feet would be a very serious concern.
Consider also the style of your lamp whether it looks modern or more traditional.
Mark this outer height mark along the wall with a pencil.