In　the　extension　project　of　the　China　National　Academy　of　Painting,　the　radial　spherical　plain　bearing　(RSPB)　is　used　in　a　structural　joint　with　an　inserted　plate.　This　new　structural　RSPB　joint　has　complicated　mechanical　behaviors　and　universal　rotational　performance.　In　this　work,　the　simulation　and　experiment　methods　were　used　to　investigate　the　RSPB　joint　mechanical　properties　(uniaxial　ultimate　bearing　capacity,　failure　mode)　and　reliability.　Furthermore,　the　out-of-plane　rotational　performance　was　studied　with　eight　finite　models　for　the　application.　According　to　FEA　and　test　results,　this　new　RSPB　joint　has　functional　mechanical　properties.　It　is　useful　in　steel　truss　structures　and　provides　a　possibility　for　engineers　to　design　hinge　joints　in　building　structures.