Loads & Limit State Design Part B: Limit State | IS 800:2007

Loads and limit state design, Part B: limit state design — step by step. Diploma Design of Steel Structure Unit 3 (WBSCTE), and the base of every module of B.Tech CE(PC)604. Every rule is shown with its IS 800:2007 clause and then explained in plain words, and every number is worked with its what and why. Part A found the loads. Here we take them into design: working stress against limit state, the limit states of strength and serviceability, characteristic values, design action and design strength. IS 800 Table 4 with every abbreviation (DL, LL, WL, CL crane load, AL, ER, EL) and every row explained, the 0.9 footnote, Table 5 and a worked plate in tension, load combinations and a worked beam, a roof-truss member whose force reverses — with why 0.9 DL matters, worked step by step — the factors governing the ultimate strength (cl 5.5) and the deflection limits of Table 6. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ KEY POINTS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Design action ≤ design strength: Qd = Σ γf Qc ≤ Sd = Su / γm (cl 5.2.1, 5.3.3, 5.4.1) γf: 1.5 (DL + LL + CL) · 1.2 (DL + LL + CL + WL/EL) · 1.5 (DL + WL/EL) · 0.9 DL when it helps stability (Table 4) γm: yielding and buckling 1.10 · ultimate stress 1.25 · bolts 1.25 · welds 1.25 shop, 1.50 site (Table 5) Characteristic load: not exceeded with more than 5 % probability (cl 5.3.2.1) Serviceability: γf = 1.0 · floor beam span/300, span/360 with brittle finishes (Table 6) Wind and earthquake are never taken together (cl 3.5.2) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ FREE STUDY MATERIAL ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📘 Study Notes PDF — 11 pages: notation, types of loads and their codes, dead and imposed loads, wind with Cpe/Cpi, design philosophies, limit states, characteristic values, Tables 4 and 5, load combinations, factors governing ultimate strength, deflection limits, 6 worked examples, 12 exam traps, broad questions, self-test, 30-second revision 📝 MCQ Practice Paper — 25 questions in 3 sections, with an Answer Key & Explanations page at the back Both free on Telegram → https://t.me/learncivileasy ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ SYLLABUS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Diploma Civil (WBSCTE) — Design of Steel Structure, Unit 3 Limit State Design: "Basis for design. Classification of limit states. Characteristic and design actions. Ultimate and design strengths. Partial safety factors for loads and materials. Factors governing the ultimate strength — stability, fatigue and plastic collapse. Serviceability." • B.Tech Civil (MAKAUT) — CE(PC)604 Design of Steel Structures, all modules (IS 800:2007) • GATE CE and SSC-JE — steel structures, limit state basis ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WATCH NEXT ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ◀ Previous: Loads and Limit State Design — Part A: Loads ▶ Next: Classification of Cross Sections 🔔 Subscribe →    / @learncivileasy   💬 Telegram → https://t.me/learncivileasy #SteelStructures #IS800 #LearnCivilEasy