Emt set into stone, screwed to lattice work with electrical clips...cross braces held with makerpipe. Ok, a few questions answered. The vertical poles are set into the stone with flanges and expansion bolts. The firepit is 17ft long 10ft wide. The wind barrier and lanterns is 70ft in 3/4 circumference 15ft high with the lanterns. Each opening is approximately 10ft wide. It took roughly 44 maker pipe connections. All emt was painted black along with electrical brackets. Stone surfaces were ground flat at the site of connection with an angle grinder.