I don't have an axe to grind. I'm curious with Sodo doing everything on 110 volts and trying to justify it so much that he bought a dual voltage machine? I think that's a legitimate question. I do have a bit of a problem when someone/anyone posts a picture of a bad weld and instead of listening to what others have to say, tries to justify it and make excuses for it. We've all done some less than stellar work but if you can't take constructive criticism, you'll never improve. I've had other engineers say they are 3 types of loading, static, dynamic and cyclic loading. The basic understanding I was taught, over 30 years ago, was that static loading is something that just sits there, like a base plate on the bottom of a table leg. A dynamic load is something that could have changing loads but not necessarily cyclic. I would consider something like a spreader bar or a lifting hook a dynamic load and weld it as such. A lot of structural steel is static in use but welded with filler metal designed for dynamic loading. 6013/7014 for example aren't approved for welding structural steel. Even the saddles for large vessels that do just sit there are welded as if they were dynamic loads. For some things you really need to know exactly what to do and for other things all you need is a basic understanding. If a person erred on the side of caution and used 7018 on a project instead of 6013 because they weren't sure isn't likely anything to be concerned with. Welding thicker material than a welder is rated for is cause for concern.
but I think you are confusing static load with dead load. Dead load is basically the load based on the weight of the object. A static load is the dead load plus any additional load that is 'slowly' applied such that you don't create significant dynamic effects creating a shock or vibration. That additional load could be due to pressure, added mass or gravity. Anyways... back to improving one's welding and maybe even civility. 
