The　novel　form　of　hybrid　columns,　being　fiber-reinforced　polymer　(FRP)-concrete-steel　solid　columns　(FCSSCs),　involves　the　FRP　tube　and　the　steel　tube　as　the　confining　system　for　the　concrete.　The　buckling　of　the　inner　steel　in　FCSSCs　is　effectively　delayed　by　the　surrounding　concrete　while　the　strength　of　the　steel　is　sufficiently　utilized,　with　it　being　protected　by　the　outer　FRP　tube　against　environmental　attacks.　A　pilot　experimental　program　is　conducted　to　investigate　the　behavior　of　axially　loaded　FCSSCs　with　an　outer　polyethylene　terephthalate　(PET)　FRP　tube.　The　experimental　results　have　demonstrated　that　the　axial　load　carrying　capacity　of　an　FCSSC　is　much　larger　than　the　total　resistances　of　the　hollow　steel　tube　and　the　concrete-filled　FRP　tube.　The　test　FCSSCs　possess　a　monotonically　ascending　load-strain　response　with　an　excellent　ductility.　The　comparisons　between　the　test　results　and　the　predictions　from　existing　models　demonstrate　that　one　existing　model　gives　satisfactory　estimations　on　the　ultimate　axial　stress　and　strain　of　the　confined　concrete　in　FCSSCs,　while　they　are　incapable　to　accurately　predict　stress-strain　curves　of　the　confined　concrete　in　FCSSCs.