Suspension Beam is a system of extruded aluminum housings which enclose Basic or Advent Lytespan track. The 4'Housing is used with a 4' Individual Track, the 8' with an 8' individual or Joiner Track. End plates, couplers, splines and mounting clips are furnished with the housings. The housings may be installed individually, in continuous runs or in a variety of patterns and may be field-cut (at right angles).