| Concept | Description | Typical Check | |---------|-------------|---------------| | | Governs collapse or loss of stability under extreme loads. | Strength, buckling, plastic hinge formation. | | Serviceability Limit State (SLS) | Controls deflection, vibration, and crack width to ensure comfort and durability. | Deflection limits, vibration criteria, fatigue. | | Partial Safety Factors | Reduce nominal capacities and increase loads to incorporate uncertainties. | γM for material, γF for loads. | | Load Combinations | Combine dead, live, wind, seismic, etc., with appropriate factors. | As per IS 800, Eurocode 3, AISC‑360. |
| When you open a chapter in Duggal’s PDF | Think of this story’s lesson | |------------------------------------------|-------------------------------| | | Real loads are uncertain. Use partial safety factors. | | Chapter 4: Plastic Analysis | Steel can yield — that’s a feature, not a bug. | | Chapter 6: Design of Beams | Always check deflection (serviceability) BEFORE strength. | | Chapter 10: Column Bases | Failure here means no warning — design for ductile yield first. | | Appendix on IS 800:2007 | Limit state is the law now. WSM is only for some foundation cases. | limit state design of steel structures by sk duggal pdf
Some of the key features of "Limit State Design of Steel Structures" by SK Duggal include: | Concept | Description | Typical Check |