Lay out wall patterns or foundations, using straight edge, rule, or staked lines. Shape, trim, face and cut marble or stone preparatory to setting, using power saws, cutting equipment, and hand tools. Set vertical and horizontal alignment of structures, using plumb bob, gauge line, and level. Mix mortar or grout and pour or spread mortar or grout on marble slabs, stone, or foundation. Remove wedges, fill joints between stones, finish joints between stones, using a trowel, and smooth the mortar to an attractive finish, using a tuck pointer. Set stone or marble in place, according to layout or pattern. Clean excess mortar or grout from surface of marble, stone, or monument, using sponge, brush, water, or acid. Lay brick to build shells of chimneys and smokestacks or to line or reline industrial furnaces, kilns, boilers and similar installations. Replace broken or missing masonry units in walls or floors. Smooth, polish, and bevel surfaces, using hand tools and power tools. Drill holes in marble or ornamental stone and anchor brackets in holes. Repair cracked or chipped areas of stone or marble, using blowtorch and mastic, and remove rough or defective spots from concrete, using power grinder or chisel and hammer. Remove sections of monument from truck bed, and guide stone onto foundation, using skids, hoist, or truck crane. Construct and install prefabricated masonry units.