utah mason
Thanks for your ( Heads -Up ) video review , and post. It was informative. And being a plumber !, gives a lot of credibility as well..( roots, rocky clay, buried junk,etc ) .. I do like the size and sides on it. Looks more like a clean up shovel. If it had a curve bottom or triangle "V" body line on 2/3 thirds of the bottom, you would still have a straight cutting edge and more rigid structure.. Type of Metal is another issue, to have any quality , it would have to be a type of carbon steel. If any one is building one, make sure your using carbon steel. After your done welding and grinding. heat it up red hot , dunk it in a pail of oil. or water. .This will temper the metal.
If it doesn't have to be a flat straight cutting edge , maybe use a 5" "V" type trenching shovel, weld sides and back. ( that could be 6" wide after modifying)........ The handle would be more likely to break than the metal bending.. I guess everything has a limit.. Haha...........Ken