Good day, I hope you are well The *Please read before posting* was great motivation, so here's my shot in the dark... Background: I have a deadline fast approaching but this is more for my personal learning. Currently designing for a 3rd year machine design course. The (group) project brief requires a 2-stage reduction gearbox, shafts, gears and casing to be designed for marine applications. Steel plates were prescribed as the material for the casing. My concern is welding symbols. I am definitely not confident in my welding symbols which I've attached to this manufacturing drawing. The group has decided on an oil sump for gear lubrication. Question: It was suggested that all welds to the outer casing be full-penetration welds to ensure that the gearbox seals. I have indicated rather thick full-penetration welds across the breadth of the gearbox at the thick inner plates. The gearbox is covered by a thinner steel sheet bent around the gearbox and welded on. Is this the right approach to welding up the casing? Do these weld symbols make sense? Is the thickness realistic? If I give this to a MIG welder would they be happy to manufacture it? Have a great day.