I Beams

Standard American Beams, aka Junior Beam, S Beam, or I Beams have tapered flanges for increased strength of the flanges compared to the wide flange or "H" beams. Specifications:ASTM A36 / A572 Gr. 50, the standard specification for steel structural shapes for use in general construction.
    •    Standard American Beams – Also known as Junior Beams, S Beam, or I Beams have tapered flanges for increased strength of the flanges.
    •    Wide Flange Steel Beams -  Also known as W Beams or H Beams have non-tapered flanges that are wider than the standard S or I beams.