Limit State Design Of Steel Structures By Sk Duggal Jun 2026
To understand the importance of S.K. Duggal’s contribution, one must first appreciate the shift in engineering philosophy. Historically, steel structures were designed using the . While safe, WSM often led to overly conservative and uneconomical designs because it treated safety as a linear factor applied to the permissible stress.
It acknowledges that loads (dead, live, wind, seismic) and material strengths (steel yield, bolt shear) vary statistically. limit state design of steel structures by sk duggal
The book is structured to lead a designer from basic principles to complex industrial applications : To understand the importance of S
A steel beam under Dead Load (10 kN/m) and Live Load (15 kN/m). WSM might take total load = $10+15 = 25$ kN/m $\times$ FOS 1.5 = 37.5 kN/m . LSM computes: $1.35(10) + 1.5(15) = 13.5 + 22.5 = \mathbf36.0 \text kN/m$ (slightly lower, yet safer because it is probabilistic). While safe, WSM often led to overly conservative