Easily- unless you want the shelves to be the same level.
The easy way would be to join them with the left and right side shelves sharing the same two middle legs. These racks are nothing more than shelves with four holes for threaded rods with nuts to clamp and adjust the shelves. You could make your own for next to nothing, and using larger diameter rod and laminated butcher block type shelves have them be a lot better too.
Or maybe what you're talking about is two racks standing side by side and connected by just one shelf? Which would look kinda funny unless you're putting a TV or something in the space between? But whatever yeah, you could definitely take something like a butcher block cutting board the size you want, drill holes in the corners, and use it to bridge the two racks together. Could probably do it even without having to buy any new hardware.
The easy way would be to join them with the left and right side shelves sharing the same two middle legs. These racks are nothing more than shelves with four holes for threaded rods with nuts to clamp and adjust the shelves. You could make your own for next to nothing, and using larger diameter rod and laminated butcher block type shelves have them be a lot better too.
Or maybe what you're talking about is two racks standing side by side and connected by just one shelf? Which would look kinda funny unless you're putting a TV or something in the space between? But whatever yeah, you could definitely take something like a butcher block cutting board the size you want, drill holes in the corners, and use it to bridge the two racks together. Could probably do it even without having to buy any new hardware.