Oxford Firepit Installation Instructions View/Print PDF Step 1 – Set the ring on an even surface. Step 2 – Lay out the rest course of 16 blocks around the ring insert. Step 3 – Make sure the gap between the ring and blocks are even all around, and that the ring can be removed with ease. Step 4 – Remove the ring insert and set it aside. Step 5 – Lay out the next 3 courses keeping the joints staggered. (Masonry adhesive may be applied between layers, securing them in place permanently.) Step 6 – Fill the inside with the 3 bags of sand provided, and spread it out evenly. Step 7 – Set the ring back inside the firepit and press it down to set it in the sand. It should sit just below the rim of the firepit blocks.