PART VI: Crossbar
No crossbar. At all. Ever. Although most of the desks come with this installed for more stability, a good sit stand desk does not need a crossbar. It’s simple; you have absolutely no use of it and if a desk needs a crossbar for stability, than it’s not a good one. This is, basically the rod placed between the legs of the desk and comes where your own legs should be. This is a standard rule for all desks whether standing or sitting. DO NOT USE A CROSSBAR. It really irritates you when you cannot stretch your legs out after a long period of work. Of course, standing would solve that problem, but no one likes to keep their legs tucked in all the time, while knowing they’ll have to stand up every time to stretch them.
PART VII: Stability
The next thing you check is the sit stand desk’s stability. It is how secure and safe the desk is. This also means how strong it is and how much pressure it can endure. The best check for this is to raise the desk to its maximum height and try to move it on its axis. If it starts swinging around and definitely feels wobbly, you should consider another one. Balance is everything here and it really matters when you are adding much more weight to the desk. You see, if you do add such weights e.g. computers and privacy panels, the desk will have a high risk of knocking over.
Especially when you switch to standing position, as the desk is even less stable then. Of course, leaning on a desk like that would definitely not be a good idea. For the long run, it is always better to buy a sit stand desk which is stable and firm.