To　evaluate　the　feasibility　of　self-drilling　screw,　blind　rivet,　clinching,　and　self-piercing　rivet　(SPR)　connections　in　fabricated　cold-formed　steel　structures,　an　experimental　study　was　conducted　on　shear　behavior　of　four　connections　under　different　steel　sheet　thickness.　Failure　modes　and　load-deformation　curves　of　four　connections　were　summarized.　The　effects　of　thickness　ratio　on　mechanical　behavior　and　failure　modes　were　observed.　The　feasibility　of　four　connections　in　fabricated　cold-formed　steel　structure　was　comprehensively　evaluated　by　comparison　analysis　of　mechanical　behavior　and　construction　feasibility.　The　results　show　that　thickness　ratio　has　small　influence　on　failure　mode　of　clinching　but　has　great　effect　on　self-drilling　screw,　blind　rivet,　and　SPR.　Both　self-drilling　screw　and　blind　rivet　have　higher　shear　strength,　deformability,　and　construction　feasibility,　but　automatic　level　is　lower,　which　can　use　on-site　construction　of　cold-formed　steel　structures.　Clinching　should　not　apply　in　cold-formed　steel　structures　because　of　lower　strength,　deformability,　and　construction　flexibility.　SPR　has　better　mechanical　property　and　high　efficiency,　which　primarily　applies　to　fabricated　cold-formed　steel　structures.　Based　on　aforementioned　studies,　a　design　method　with　high　accuracy　and　small　discreteness　of　SPR　connections　is　proposed.　©　2018,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.