In the United States, the most commonly mentioned I-beam is the wide-flange (W) shape. These beams have flanges whose inside surfaces are parallel over most of their area. Other I-beams include American Standard (designated S) shapes, in which inner flange surfaces are not parallel, and H-piles (designated HP), which are typically used as pile foundations. Wide-flange shapes are available in grade ASTM A992,[5] which has generally replaced the older ASTM grades A572 and A36. Ranges of yield strength:
A36: 36,000 psi (250 MPa)
A572: 42,000–60,000 psi (290–410 MPa), with 50,000 psi (340 MPa) the most common
A588: Similar to A572
A992: 50,000–65,000 psi (340–450 MPa)
Like most steel products, I-beams often contain some recycled content.
European standards[edit]
EN 10024, Hot rolled taper flange I sections – Tolerances on shape and dimensions.
EN 10034, Structural steel I and H sections – Tolerances on shape and dimensions.
EN 10162, Cold rolled steel sections – Technical delivery conditions – Dimensional and cross-sectional tolerances
AISC manual[edit]
The American Institute of Steel Construction (AISC) publishes the Steel Construction Manual for designing structures of various shapes. It documents the common approaches, Allowable Strength Design (ASD) and Load and Resistance Factor Design (LRFD), (starting with 13th ed.) to create such designs.
Other[edit]
DIN 1025-5
ASTM A6, American Standard Beams
BS 4-1
IS 808 – Dimensions hot rolled steel beam, column, channel and angle sections
AS/NZS 3679.1 – Australia and New Zealand standard
