The paper introduces a simplified method of flexible frame analysis that builds on some aspects of the already establilshed AISC/LRFD design approaches, namely the B sub 1 and B sub 2 amplification factor method. Two idealized connection models are proposed: the first is a modified initial stiffness representation; and second is a model determined by the beam-line method. The connection models are designed for implementation in a first-order analysis of the nonsway and sway configurations of frame. The effective length factor concept is utilized with some modifications to account for connection flexibility. A modified relative stiffness factor for elastically restrained members is suggested, which allows the use of existing alignment charts for determining the effective length factor of columns.