The term 'large metal beam' can be summarized as a GIRDER, which is a six-letter word. A GIRDER is a large, horizontal beam that is used to support the weight of a structure, such as a bridge or building. It is usually made of steel or reinforced concrete and is designed to carry heavy loads. Girders are an essential part of any construction project and are often used in combination with other structural elements to create a strong and stable foundation.