Moving Firepit
This customer wanted a proper stone firepit, but also wanted to move it out the way when not needed. So he built his on wheels.
A stone firepit could weigh up to quarter of a tonne, so he first made a strong metal frame on wheels. Then built the firepit on top from standard stone blocks and cladding. This allowed him to move the whole pit when needed.
I’m not quite sure how he connected the gas supply.