Two types of ironwork are found in the city: wrought (worked) iron and cast iron. Wrought iron is forged and beaten into shape - cast iron is melted and poured into molds. Manufacture of wrought iron pieces is more labor intensive but it is stronger and more durable than the rather brittle cast or "grey" iron. Both kinds of work are found throughout Savannah. Cast iron work, at left, may be made of many identical pieces, each cast separately and repeated. Wrought iron is made of hammered bar or sheet stock as illustrated by the stair railing at right.