The present invention provides a wide-top decking beam configured for installation in a cargo container. The beam comprises an elongate, hollow body forming an approximately rectangular shape. Flanged edges extend laterally from both sides of the top surface along the length of the beam, wherein the top of the beam has a greater width than the bottom. Obliquely angled struts run along both sides of the beam connecting the sides of the beam body to the undersides of the flanged edges thereby forming triangular trusses along the length of the beam.