adj.without braces or props

Optimum design of unbraced rigid frames
Behavior of braced and unbraced semi-rigid frames
The effective length of columns in Unbraced frames
Shaking table tests of a two-story unbraced steel frame
Practical advanced analysis for unbraced steel frame design
Effective Length Factor for Columns in Unbraced Frames
Optimum design of unbraced steel frames to LRFD-AISC using particle swarm optimization
The design and behavior of beam-columns in unbraced steel frames
Flexible Moment Connections for Unbraced Frames Subject to Lateral Forces—A Return to Simplicity
Story Stability of Braced, Partially Braced, and Unbraced Frames: Classical Approach