I-Beam Fundamentals
I-beams are efficient structural members designed to carry bending and shear loads in construction.
- Section Properties Optimized shape for maximum moment of inertia
- Load Distribution Efficient for both uniform and point loads
- Material Strength High-strength steel grades available
- Design Factors Considers bending, shear, and deflection
Steel Grades
- ASTM A36 Common structural steel, Fy = 36 ksi
- ASTM A572 Gr.50 Higher strength, Fy = 50 ksi
- ASTM A992 Modern W-shapes, Fy = 50 ksi
- Selection Criteria Based on load requirements and cost
Design Considerations
Deflection Limits
L/360 for floors, L/240 for roofs
Lateral Support
Required to prevent lateral-torsional buckling
Connection Design
Critical for load transfer and stability
Load Combinations
Dead, live, and environmental loads