Railroad support consists of two components: the cross tie and the TRESTLE. A cross tie is an essential component of a railroad track, as it provides the lateral support needed to keep the rails in place. It is typically made of wood or concrete and is 8 letters long. A TRESTLE is a bridge-like structure that supports the track above ground level, allowing trains to pass over rivers, valleys, and other obstacles. It is 7 letters long. Together, these two components provide the necessary support for a railroad track.