I got myself a bigger heatbed (300x200) for my anet A8 and had to redesign the frame a little.
As the new frame had to be 100mm longer, I choose to exchange the 8mm threaded rods, with 10mm threaded rods.
To reduse noise, vibrations, etc. I put the printer on a stone plate and screwed it down with those brackets.
To make sure, that the brackets don't slide, there is a 10mm metric thread at the top.