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Wide Flange Beam W18x71 W18x76 steel structure
W18x71 steel h beam
Depth (d): 18.5 in (approx. 470 mm)
Flange width (bf): 7.64 in (approx. 194 mm)
Flange thickness (tf): 0.810 in (approx. 20.6 mm)
Web thickness (tw): 0.495 in (approx. 12.6 mm)
Cross-sectional area (A): 20.9 sq in (approx. 134.8 sq cm)
Weight: 71 lbs/ft (approx. 105.7 kg/m)
W18x76 h beam
Depth (d): 18.2 in (approx. 462 mm)
Flange width (bf): 11.0 in (approx. 279 mm)
Flange thickness (tf): 0.680 in (approx. 17.3 mm)
Web thickness (tw): 0.425 in (approx. 10.8 mm)
Cross-sectional area (A): 22.3 in2 (approx. 143.9 cm2)
Weight: 76 lbs/ft2 (approx. 113.1 kg/m2)
The flange width of the W18x76 is significantly wider than the W18x71 (11.0 in. vs. 7.64 in.), which means it has greater lateral stability.
The W18x71 has thicker flanges and webs, while the W18x76 has a flatter section and is slightly heavier.
Steel H Column Mechanical Properties
The mechanical properties of W18x71 and W18x76 h-shaped steel depend on the material of the steel used. Typical parameters for ASTM A992 (common high-strength low-alloy steel) as an example.
Yield strength (Fy): 50 ksi (about 345 MPa)
Tensile strength (Fu): 65 ksi (about 448 MPa)
Modulus of elasticity (E): 29,000 ksi (about 200 GPa)
Sectional properties (moment of inertia and modulus)
W18x71 h section steel:
Moment of inertia Ix (about strong axis): 1330 in⁴ (about 553,000 cm⁴)
Moment of inertia Iy (about weak axis): 88.9 in⁴ (about 37,000 cm⁴)
Section modulus Sx: 144 in³ (about 2360 cm³)
Plastic modulus Zx: 163 in³ (about 2670 cm³)
W18x76 h beam structure:
Moment of inertia Ix: 1330 in⁴ (about 553,000 cm⁴)
Moment of inertia Iy: 209 in⁴ (about 87,000 cm⁴)
Section modulus Sx: 146 in³ (about 2390 cm³)
Plastic modulus Zx: 166 in³ (about 2720 cm³)
Analysis: The Iy (weak axis moment of inertia) of W18x76 is much higher than that of W18x71, indicating that it has stronger resistance to lateral bending and is suitable for scenarios that require greater lateral support.
Features and advantages of h beam material
High strength-to-weight ratio: The cross-section design of H-beam is optimized, which has higher strength and load-bearing capacity than ordinary I-beam.
Convenient construction: The wide and flat flange is convenient for welding and bolting, which improves construction efficiency.
Economical: Under the premise of meeting the design requirements, the weight distribution is reasonable and the material cost is saved.
Durability: Using ASTM standard steel, it has excellent corrosion resistance and fatigue performance (which can be further enhanced by galvanizing or coating).
