Typical cross sections and their Area Moment of Inertia.
Second moment of area - Wikipedia
Area Moment of Inertia - Typical Cross Sections I, PDF, Beam (Structure)
Beams - Fixed at One End and Supported at the Other - Continuous and Point Loads
Area Moment of Inertia, PDF, Beam (Structure)
Second moment of area - Wikipedia
Understanding the Area Moment of Inertia
Euler's Column Formula
Area Moment of Inertia, PDF, Beam (Structure)
Understanding the Area Moment of Inertia
Area Moment of Inertia - Typical Cross Sections II, PDF, Sketch Up
Steel Angles - Equal Legs