What is the difference in performance between W18x71 W18x76 w shape beam with A992 material?
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.
