In my classroom, I use a large Rubbermaid "Brute" container, to hold our reclaimed clay. I bought a dolly with it, made by Rubbermaid, that is made to fit those types of containers. I bought both from my ceramic supplier, several years ago, and they held up the first couple years. Last year however, the dolly gave out. I discovered this, when I went into my classroom, and the clay bin was laying on its side. I had taken all the clay out of the bin, a couple weeks before, and rewedged it all to mix it. I threw it back in the bin. I weighed it out as I went, to figure out how much clay the bin holds. I totaled conservatively 500lbs., and the bin wasn't even full. Turns out, the dolly is only rated for 350lbs.... I assumed, that a bin and dolly sold from a ceramic supplier, would be able to take the weight of the max amount of clay, the bin could hold. Obviously, I shouldn't make such assumptions.
Anyway, last year, the bin sat on the floor, stationary. All year, I was planning on building a dolly myself, out of some heavy duty casters, and lumber. I never got around to it, last year. So I was going to have it be a Summer project. However, in my search for some casters, I found a dolly online. It's made from a rubber coated fiberboard. It says it can hold 800 lbs. I don't doubt that it can, but as it seems to be made for moving large items, I question whether it can continually carry the weight? I realize there is a difference, between holding something for a short while, and holding something indefinitely.
What does everyone think? Will it be able to hold, around 500 lbs, on a fairly consistent basis?