I've not been able to find an electric sit/stand desk that is a size I want so I've designed my own. I'm confident in the electronics side of things but I'm not certain of the strength of the materials. The actuators I'm using have a stroke of 450mm and can push/pull 1500N so they're definitely strong enough but the desktop is 3.2m long with a simple rectangle steel frame made of 35mm square tube with a 2mm thickness. I will have a lot of gear on the desk so I want to be able to puch up to 100kg excluding the desk itself so I have to consider the weight of the materials used. Will this frame be strong enough to handle 50kg-ish in the very center without flexing?
Images of my design can be found here: https://i.stack.imgur.com/Rxx1Q.jpg