Check the building plans or structural drawings
Look for walls aligned directly above or below in other floors
Identify walls that run perpendicular to floor joists
Check if the wall is in the center of the building
See whether the wall supports beams, lintels, or columns
Inspect for doubled joists, beams, or posts above the wall
Look for walls made of thicker or heavier materials
Check if the wall continues through multiple stories
Verify whether the wall is attached to roof trusses or ceiling joists
Consult a structural engineer or qualified contractor