I want to incorporate a trailer hitch receiver - almost flush with the concrete. To do that, I have to design a way to insert the pin - inside the concrete.
I purchased some square tubing sized to allow the hitch to slide in. Measured how far back to drill my holes, making them slightly oversized.
Now I am welding tubes - a long one that will penetrate from the receiver hitch thru concrete to daylight; and a short one on the other side.
Attachment 298334
Here I am setting up to weld the long one. It's been a long time since I welded. This isn't going to be pretty