This　paper　summarises　the　previously　conducted　experiments　on　local　and　local-overall　buckling　behaviour　of　welded　stainless　steel　box　section　columns　under　axial　compression.　A　total　of　thirteen　stub　column　tests　and　eight　local-overall　interactive　buckling　tests　were　carried　out.　The　box　section　test　specimens　were　manufactured　and　fabricated　by　welding　hot-rolled　stainless　steel　plates　of　austenitic　grade　EN　1.4301　and　duplex　grade　EN　1.4462.　The　material　properties,　welding　residual　stresses,　initial　local　and　global　geometric　imperfections　were　all　accurately　determined　prior　to　the　loading　tests.　The　stub　column　specimens　were　tested　under　pure　axial　compression　with　fixed　end　boundary　conditions,　revealing　the　local　buckling　behaviour　of　stiffened　stainless　steel　plates.　The　long　columns　with　intermediate　overall　slenderness　ratios　were　axially　loaded　between　two　pin-ended　supports,　which　were　subject　to　local-overall　interactive　buckling　failure.　The　obtained　test　strengths　were　used　to　evaluate　the　existing　design　methods:　the　design　provisions　of　Eurocode　3　Part　1.4,　the　direct　strength　method　(DSM)　and　its　modified　form.　The　EN　1993-1-4　design　provisions　provide　conservative　strength　predictions　while　the　DSM　slightly　overpredicts　the　buckling　capacities　for　the　stub　columns.　Furthermore,　both　the　EN　1993-1-4　design　provisions　and　the　DSM　in　the　EN　1993-1-4　format　tend　to　generate　overpredicted　interactive　buckling　resistances　for　columns　of　austenitic　grade　and　underestimated　resistances　for　those　of　duplex　grade.　The　modified　DSM　was　proved　to　offer　more　accurate　strength　predictions　for　both　local　and　local-overall　buckling　resistances　of　welded　stainless　steel　box　section　columns.　©　2015　Taylor　&　Francis　Group,　London.