BurbMan wrote:
I did the same thing years ago when I first started using the BAL chocks. I have also pulled the trailer over one of these plastic chocks and crushed it like a beer can.
Probably the worst site I have ever had, at a KOA no less...had to borrow those cement blocks from the staff because the 2 bags of Lynx levelers and all the scrap wood I had on board didn't cut it. Note that the BAL chocks held the TT as stable as any chock would.

While you did place the load on the cement block over the solid rib, I would never trust a lone cement block to support anything of weight!!!
Way too many backyard mechanics have been crushed using to support a car they are crawling under!!