Steel Design: Combined Axial and Flexure Members Part 1 (Intro+Problem 1) NSCP 2015
Reference:
National Structural Code of the Philippines-2015
Structural Steel Design by Jack McCormac and Stephen Csernak.
AISC shapes database: https://www.aisc.org/globalassets/aisc/manual/v15.0-shapes-database/aisc-shapes-database-v15.0.xlsx