This　study　presents　a　bolted　built-up　H-section　column　using　high-strength　steel　with　a　yield　stress　higher　than　770　MPa.　Ten　specimens　were　tested　under　axial　compression　loading　to　study　the　failure　modes,　loaddeformation　behavior,　strength　and　stiffness,　and　strain　characteristics.　Test　variables　included　bolt　pitch　(200,　400,　600,　800,　and　1200　mm)　and　column　slenderness　ratio　(17.8,　39.7,　63.4,　and　87.1).　When　the　slenderness　ratio　is　small,　the　specimens　show　a　local　buckling　dominated　failure;　when　the　slenderness　ratio　becomes　larger,　the　specimens　show　an　overall　buckling　dominated　failure.　The　ultimate　strength　and　axial　stiffness　increase　with　the　decrease　in　slenderness　ratio　and　bolt　pitch,　and　the　calculated　axial　stiffness　is　consistent　with　the　test　results.　The　axial　compressive　strengths　were　calculated　according　to　AIJ　2002,　ANSI/AISC　360-16　and　GB　50017-2017　design　codes;　in　addition,　the　equivalent　slenderness　ratio　parameters　were　also　compared　and　discussed.　The　results　show　that　the　design　method　suggested　by　AIJ　2002　provides　good　predictions　for　the　ultimate　strength　of　tested　bolted　built-up　H-section　columns.