I'm making a prototype that will have some load cells mounted approximately where the arrows are pointed in the image. The prototype will hold up to 100kg of load/force in the marked location thus I need to fabricate a frame with the correct strength to not bend or flex too much under load. I want to achieve this without welding and only bending 90-degree angles out of a sheet of metal to make the frame to the right in the attached image. The frame will be mounted to a wall, so the load is applied approximately 50mm or 2 inches out from the wall itself.
What grade of steel/metal and thickness do I need to achive this? Or how can I calculate this? Or maybe you guys know of a software I can use to calculate or simulate it?