Construction pieces are essential components of any building project. Rebar, a five letter word, is a steel bar or mesh of steel wires used as a tension device in reinforced concrete and masonry structures. A GIRDER, a six letter word, is a large BEAM that supports the structure of a building. Tnut, a four letter word, is a type of nut used to fasten two pieces of material together. BEAM, also a four letter word, is a long, horizontal structural member used to support the load of a structure. Lego, another four letter word, is a type of plastic construction toy consisting of interlocking pieces. Ibar, ibeam, lbar, and tbar are all four letter words that refer to different types of metal bars used in construction. An ibeam, a five letter word, is a type of steel BEAM with an I-shaped cross section.