ok-first i was going to make one from ss sheets, than find an old one on craigslist and insulate it with hardibacker. But, after putting a patio in my back yard by myself, and working with concrete, i thought... plan out exact dimensions-total 6 panels. mix up some cement with fine sand and pour each panel with some wire mesh in the middle. THIS ISN'T GOING TO BE EASY and there are many other details (like getting the hardware in place before it all hardens) so my question is more related to how heat will affect a 3/4" thick cement sheet and will it radiate heat as well as i'm hoping? Does anyone have any ideas or is this completely ridiculous. I really have considered just buying a cheapo vert. square smoker at HD and insulating it...but i want something more custom and with a little more room. The cheap vert. smokers don't have the width for laying down a nice brisket-which is what i want.