I finally pitched my 6 month old shop shelving after one comment from a welder in Dayton
Built these wood shelves for my garage to hold paint cans and tools, and I was proud of them. Posted pics and a guy who builds weld tables for a living pointed out my 2x4 uprights were only tied to the wall with two drywall screws each, no brackets, no blocking. I got defensive for about a day. Then I loaded a shelf to test it and the front edge sagged 3/8 inch with maybe 60 pounds on a 48 inch span. I pulled the whole thing down and redid it with 3/4 plywood gussets and lag bolts into the studs, and the new version barely moves. Cost me about $40 in hardware and a Saturday. Looking back, two screws holding a loaded shelf is just dumb. How much weight do you all plan for per foot on garage shelving?