Columbia subject headings:
Building, Iron and steel--Tables.
Steel, Structural--Specifications--United States.
Steel, Structural--Tables.
Harvard subject headings:
Building, Iron and steel--Tables
Steel, Structural--Specifications--United States.
Steel, Structural--Tables.
Princeton subject headings:
Building, Iron and steel--Tables.
Steel, Structural--Specifications--United States.
Steel, Structural--Tables.