Duggal does not shy away from the complexities of LSM. The method requires iterative calculations, a thorough understanding of buckling curves, and careful second-order analysis (P-$\Delta$ effects) for multi-story frames. For beginners, the multitude of partial factors and code clauses can be daunting. Furthermore, LSM demands high-quality fabrication; its reliance on plastic behavior is invalidated if brittle fractures occur due to poor welding or low-temperature exposure.
Unlike foreign authors (like Salmon & Johnson or McCormac) who assume advanced calculus, Duggal writes for the Indian undergraduate. Every design problem follows the literal sequence of IS 800:2007 code clauses. For example, when designing a compression member: limit state design of steel structures by sk duggal
S.K. Duggal structures his text around two primary categories of limit states: Duggal does not shy away from the complexities of LSM