The effect of shear deformation in singly-stepped sinusoidal corrugated web columns on the effective lengthfactors is analyzed, and theoretically derived formulation was presented firstly. Compared with approximately TheCode for Design of Steel Structures ( GB 5001 7 2003 ) and the FEA results, it was concluded that the verification ofglobal stability in the singly-stepped sinusoidal corrugated web columns is proposed by combing the effective lengthfactors given by GB 5001 7 2003 with the design formula from Technical Specification for Sinusoidal Web SteelStructures ( CECS 290:201 1 ) which reflects the effect of shear deformation of corrugated web. And the formula forcalculating the lateral deformation of singly-stepped sinusoidal corrugated web columns was given. Finally, thestructural construction details and design of shoulder-beam of singly-stepped column were introduced.