Experiments　on　beams　with　tubular　chords　and　corrugated　steel　webs　were　carried　out.　The　differences　among　the　three　specimens　lie　in　the　chords　of　hollow　steel　tube　or　Concrete　Filled　Steel　Tube　(CFST).　In　specimen　A,　all　chords　are　hollow　steel　tubes;　in　specimen　C,　all　chords　are　CFST;　while　in　specimen　B,　the　upper　chords　are　CFST　but　the　lower　chords　are　hollow　steel　tubes.　Stresses,　displacements,　failure　modes　and　ultimate　load　carrying　capacity　of　the　beams　are　analyzed　and　compared　with　each　other.　Experimental　results　show　that　the　flexural　rigidity　and　ultimate　carrying　capacity　is　improved　considerably　if　the　chords　are　CFST　compare　to　hollow　steel　tubes.　Joint　failure　in　tubular　trusses　can　be　avoided　in　such　a　beam　with　tubular　chords　and　corrugated　webs.　Based　on　the　Quasi-Planc-Section　assumption,　the　formula　to　calculate　the　ultimate　load　of　this　new　composite　structure　is　presented　and　the　predicted　results　agree　well　with　the　test　results.