(newbie) materials to build a sliding "inverted-L" stand / pole
Just discovered this fantastic website! I have this very cool idea for a 'ible I am working on and cannot wait to put it on the site. For now and as a first step (sorry, I am a newbie!), I am simply trying to build a simple stand with the following "inverted L" shape:
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Think of tje coat hanger in the picture below, only sturdier and with a single vertical pole (and without the wheels/mesh at the bottom).
Also, the vertical pole does not need to be telescopic: as long as I can adjust the height of the horizontal pole I am happy.
This could be done eg by mounting the horizontal pole on a "tee" fitting; but then how do I make it fix into a given position/height on the vertical pole (and still be adjustable)? (I had a look at this 'ible -- https://www.instructables.com/id/Third%2c-fourth%2c-and-possibly-fifth%2c-hand/ -- , but I don't understand how the tee fitting gets fixed into position: welding?)
I am thinking of using pipes or PVC from a hardware store. My big question is: how can I get the vertical adjustment feature using such readymade materials?
Thank in advance for any help!