American W Shapes Section W18x311
W18x311 h section beam is a wide flange H-beam (W series) in accordance with the ASTM A6/A6M specification. "W18" indicates that the nominal height of the section is 18 inches (457mm), and "311" indicates that the unit weight is 311 pounds per foot (463 kg/m).
W18x311 h section beam size parameters
Height (h): 18.4 inches (467mm)
Flange width (b): 12.3 inches (312mm)
Web thickness (tw): 1.26 inches (32mm)
Flange thickness (tf): 2.11 inches (54mm)
Cross-sectional area: 91.3 square inches (589 cm²)
Moment of inertia (Ix): ~3,800 in⁴ (15.8×10⁶ cm⁴)
W18x311 h shaped steel beam implementation standard
ASTM A6/A6M (general structural steel standard)
Common materials: A572 Gr.50 (high-strength low-alloy steel) or A992 (special steel for construction)
The main materials of W18x311 h shaped steel beam are A572 Gr.50 and A992, both of which are high-strength low-alloy steels suitable for heavy buildings and bridge structures.
W18x311 h shape metal is used in ultra-high load scenarios, such as skyscraper core columns, heavy industrial plant main beams, and cross-sea bridge main span structures.
W18x311 h shape metal actual cases
San Francisco Transbay Transportation Center: W18 series H-shaped steel is used as the main support structure.
Middle East oil platform modular building: bulk purchase of W18x311 for load-bearing frames.
GNEE is an H-beam supplier with 18 years of production experience. The h type beam we provide is strictly produced in accordance with the standards, has passed the quality certification, can provide quality certificates, and accept third-party testing. We are always ready to help you with all your structural h beam needs.
We have S355JR h type beam, S275JR steel beam, S355J2 h beam steel structure, S355J0 h section beam, S355NL h section steel, S355ML structural steel beam, A36 w flange beam, A572GR50 w shape beam, A992 w shape structural steel and other materials in stock. At the same time, GNEE supports multi-specification and multi-brand H-beam customization. If you have customized needs for profiled steel, angle steel, and channel steel, please contact us!
