What would be the best way to secure an office chair to the floor?

I work in an environment where if it is not nailed down it will go missing so I have to be able to secure my office chair to the floor before I can get a replacement (the chair I have now could politely be called a pos). I still need the chair to swivel and move accross the floor within my work space but be immobile enough that it can't be moved out of my area by either rolling it out or picking it up.

Mount one of those retractable dog leashes from desk and lock the other end to your POS chair.

Try tying it to the desk with some steel rope. You can buy some at a local hardware store, as well as the hardware you use to make a loop in it. You can just padlock it to your desk and either make the rope long enough so you can keep it locked up and still move it around, or just short enough so you can lock it up at the end of the day or when you leave the office.

I found this to be a great solution to my swivel chair with casters on it which is a rare find where I work. Most chairs there do not have wheels on the bottom and are very cumbersome to use.

chain it to your desk....

In the computer labs at my school they get some sort of cord and lock it to the desk and then around part of the chair so that it can't come off. Then the chair still has a radius of about 3 or 4 metres, but nobody can just take them. It's kind of like a bike lock for a chair, but made out of fairly thick metal-type cord. Sorry I can't describe it better.

ha ha hee hee haa. Oh, you aren't talking about a prank but a logical solution to a missing chair problem. I would go with the chain and lock idea, get a bike chain for cheap.

A truly secure system that will provide total mobility would cost a lot more than a cable lock that you could throw around it when you leave your desk.

I would connect a high voltage source, capable of producing 10,000 volts at 40 amps to the chair top. When someone tries to steal it, they get turned into ash. In the morning, you simply vacuum up the ash. Problem solved!