steel beam dimensions for the W30x90 section
Meaning of W30×90 wide-flange beam structure
W: stands for wide-flange H-shaped steel (Wide-Flange Shape), the flange width is similar to the web height, and the cross-sectional mechanical properties are more balanced.
30: The cross-sectional height is about 30 inches (762 mm) (the actual size may vary slightly due to the production process).
90: The theoretical weight per foot of length is about 90 pounds (about 134.1 kg/m).
| project | Numeric | unit |
|---|---|---|
| Section height (h) | 762 | mm |
| Flange width (b) | 264mm | mm |
| Web thickness (tw) | 9.5 | mm |
| Flange thickness (tf) | 16.5 | mm |
| Cross-sectional area (A) | 170.8 | cm² |
| Theoretical weight | 134.1 | kg/m |
| Moment of inertia (Ix) | 150,000 | cm⁴ |
| Moment of inertia (Iy) | 14,300 | cm⁴ |
| Section modulus (Sx) | 4,010 | cm³ |
| Section modulus (Sy) | 1,400 | cm³ |
Mechanical properties and advantages of W30x90 wide flange beam
1. Section characteristics
Strong bending resistance: The wide flange design makes the section inertia moment (Ix, Iy) and section modulus (Sx, Sy) significantly higher than ordinary I-beams, and can withstand greater bending moments and torques.
High stability: The inner and outer surfaces of the flange are parallel, which is convenient for connection (such as bolts, welding), and the structural stability is better than that of narrow flange steel.
2. Economical
Compared with traditional I-beams, W30×90 can save 10%–30% of materials at the same weight, while reducing the amount of construction (such as welding and bolting); it is suitable for large-span structures, reduces the number of support points, and optimizes the overall cost.
Steel Grades of W30×90
| Standard | Steel Grade | Yield Strength (min.) | Tensile Strength |
|---|---|---|---|
| ASTM A992 | A992 / Grade 50 | 50 ksi (345 MPa) | 65 ksi (450 MPa) |
| ASTM A572 | Grade 50 | 50 ksi (345 MPa) | 65 ksi (450 MPa) |
| ASTM A36 | A36 | 36 ksi (250 MPa) | 58–80 ksi (400–550 MPa) |
| ASTM A588 | Grade A / B / C / K | 50 ksi (345 MPa) | 70 ksi (485 MPa) |
| ASTM A709 | Grade 50 | 50 ksi (345 MPa) | 65 ksi (450 MPa) |
| ASTM A709 | Grade 50W | 50 ksi (345 MPa) | 70 ksi (485 MPa) |
| ASTM A913 | Grade 50 | 50 ksi (345 MPa) | 65 ksi (450 MPa) |
| ASTM A913 | Grade 65 | 65 ksi (450 MPa) | 80 ksi (550 MPa) |
| ASTM A572 | Grade 60 | 60 ksi (415 MPa) | 75 ksi (520 MPa) |
| CSA G40.21 | 350W | 50 ksi (345 MPa) | 65 ksi (450 MPa) |
| EN 10025 | S355JR / S355J2 | 355 MPa | 470–630 MPa |
W30x90wide-flange beam wide flange Application areas
1. Construction engineering
High-rise building frame: as the main beam and column, it bears vertical loads and horizontal wind loads/seismic loads.
Industrial plant: used for large-span roof beams and crane beams to meet the installation requirements of heavy equipment.
2. Bridge engineering
Highway/railway bridges: as the main beam or pier structure, it bears dynamic loads and alternating stresses.
Combined beam bridge: combined with concrete slabs to form a combined section to improve overall stiffness.
3. Machinery and equipment
Heavy machinery frame: such as the support structure of cranes and mining equipment.
Equipment foundation: used for the base of large machines to provide stable support.
4. Other fields
Marine engineering: such as offshore platform structure (need to cooperate with anti-corrosion treatment).
Storage racking: columns and beams for high-load racking systems.
Compare to other specifications
| Specification | Height (mm) | Weight (kg/m) | Typical Uses |
|---|---|---|---|
| W30×90 | 762 | 134.1 | Medium-sized building beams, bridge secondary beams |
| W30×116 | 762 | 172.7 | Heavy building columns, bridge beams |
| W27×94 | 686 | 140.0 | Smaller span industrial structures |
