Stonemasons often work from a set of drawings in which each stone has been numbered for identification. Helpers may locate and bring the prenumbered stones to the masons. A derrick operator using a hoist, may be needed to lift large pieces into place. When building a stone wall, masons set the first course of stones into a shallow bed of mortar. They align the stones with wedges, plumblines, and levels, and adjust them into position with a hard rubber mallet.
Masons build the wall by alternating layers of mortar and courses of stone.
To hold large stones in place, stonemasons attach brackets to the stone and weld or bolt them to anchors in the wall. Finally, masons wash the stone with a cleansing solution to remove stains and dry mortar. When setting stone floors, which often consist of large and heavy pieces of stone, masons first use a trowel to spread a layer of damp mortar over the surface to be covered. Using crowbars and hard rubber mallets for aligning and leveling, they then set the stone in the mortar bed. To finish, workers fill the joints and wash the stone slabs.