A　prefabricated　F4T-section　thin　concrete　encased　steel　(F4T-TCES)　column　with　a　low　reinforcement　ratio　is　proposed　to　address　instability,　corrosion　resistance　issues　in　pure　steel　columns,　and　column　protrusion　out　of　the　wall.　The　F4T-section　is　a　T-shaped　column　with　internal　steel　featuring　four　flanges.　Ten　F4T-TCES　short　columns　were　tested　under　axial　compression　loads,　examining　five　new　stirrup　types　to　facilitate　construction　and　study　their　impact　on　load-carrying　capacity.　The　effects　of　steel　flange　and　web　thicknesses,　stirrup　and　longitudinal　bar　diameters,　stirrup　spacing　and　form,　and　concrete　encasement　thickness　on　axial　compressive　behavior　were　investigated　through　tests　and　finite　element　(FE)　analysis.　Results　indicate　that　less　reinforcement　and　thin　concrete　cover　can　restrain　steel　elastic　buckling　and　fully　utilize　material　properties.　Using　8　mm　diameter　longitudinal　bars　and　a　1.32　%　stirrup　ratio　provides　sufficient　strength　and　adequate　confinement.　Reliable　performance　is　achieved　with　a　flange　thickness　of　12　mm,　while　increasing　web　thickness　beyond　8　mm　shows　no　significant　improvement.　Increasing　concrete　encasement　thickness　from　45　to　70　mm　effectively　reduces　the　cracking　of　the　concrete　cover.　Specimen　with　stirrup　type　C　exhibits　the　highest　load-carrying　capacity,　delayed　crack　initiation,　and　narrower　crack　widths,　with　type　D　also　performing　well　in　crack　control.　All　five　stirrup　types　meet　load-carrying　requirements,　with　types　C　and　D　being　easier　to　construct　and　thus　preferable.　Formulas　for　the　axial　compressive　strength　and　a　simplified　load-axial　deformation　model　for　F4TTCES　columns　are　proposed　and　validated.