I have heard that you shouldnt put a fire pit on concrete.. The center circle will be more resistant to cracking and will not damage the doughnut .
I am planning to build the fire pit on top of my new concrete deck and. If you must have a fire pit over concrete, I would suggest that it would. . walls you build for the firepit, the less chance to damage the structure with heat.
Outdoor fire pits in public places can potentially cause serious accidents. Proper planning, design and construction can greatly reduce the danger and help you .