My project in mind was to take a welding cart and make it into another bike trailer, and that's when I decided that instead of making all new hitch parts for the welding cart, I would just combine the two carts into one for a longer trailer that could give me a bit more capacity, with the minimal amount of work necessary.
My main concern when building the trailer was that it would not be too flimsy as to warrant it unusable, yet easy enough to build that I would not have to seek out someone with welding equipment, either.
Step 1: Carts Galore
The original trailer conversion I also added wood to the top of it for a flatter platform.
Step 2: Joined Carts
The silver colored cart is the original, refurbished children's stroller cart. The angled beam is actually only connected on the original child's cart, which all sits underneath of the red welding cart. Both carts are joined together by 1" U-bolts, with the exception of the solitary silver EMT conduit beam that runs along the left side of the red welding cart, which is also bolted onto the underlying silver cart with a 1/4" galvanized bolt.
Step 3: Bolted Connection
Step 4: Further Detail
Step 5: Finished Cart
There are few bolts attached, and very little drilling, since the cart is mostly being held together with U-bolts, and seems to be quite stable. It's overall length is just over 5 feet long, and the hitch from the original cart made it even easier to assemble, since I didn't have to make a hitch from scratch. You'll also notice that I attached the welding cart's handle with the curve facing inwards towards the cart; the reason for this was to create a little extra strength for the inside as well as to prevent the bar hanging downward any more than necessary.
I hope that you found this, my first, instructable to be of some use. Using a bike for transport and to move large items with a trailer is a very environmentally responsible choice in our current world situation, as well as it's a great way to get others to notice that it is possible.
I welcome any and all suggestions, critiques, donations of other carts (PLEASE). And thanks for looking
Leave the SUV at home and get out there and ride!