The document discusses structural steel, including its composition, properties, types, and applications in construction. It describes how steel is made from iron with added elements, and its varying properties based on carbon content. The types discussed are mild steel, medium carbon steel, and high carbon steel. Common structural steel applications mentioned include beams, columns, trusses, and framing for buildings like airports and stadiums.

1. A presentation on Structural Steel By: Vinod Singh

5. Comparison between Cast Iron, Wrought Iron & Steel Comp strength 4.75 -25.2 tonnes/ sq cm Ultimate tensile strength is 5.51 to 11.02 t /sq m compressive strength is 2.0 tonnes/sq cm and ultimate tensile strength 3.15 tonnes/sq cm Comp. strength 6.3-7.1 tonnes/sq cm Ultimate tensile strength 1.26 to 1.57tonnes/sq cm. Strength Can be hardened & tempered Cannot be hardened or tempered Hard, hardened by heating & sudden cooling Hardness 1300-1400 degree Celsius 1500 degree Celsius 1200 degree Celsius Melting point Midway Purest Contains up to 0.25% carbon Crude form containing 2-4% carbon composition Steel Wrought iron Cast Iron

6. Comparison between Cast Iron, Wrought Iron & Steel Absorbs shocks Cannot stand heavy shocks Does not absorb shocks Reaction to sudden shock Rapidly forged or welded Easily forged or welded Brittle and cannot be welded or rolled into sheets Forging & Welding Tough, malleable & Ductile Tough, malleable, ductile & moderately elastic Brittle & cannot be welded or rolled into sheets Malleability&Ductility Rusts easily Rusts more than Cast Iron Does not rust easily Rusting Steel Wrought iron Cast Iron

7. Comparison between Cast Iron, Wrought Iron & Steel Used as reinforcement in R.B. & R.C.C. Used in making St. members, bolts, rivets and sheets (plain and corrugated) Making cutlery, files & machine tools Costlier than mild steel so being replaced by the latter Withstand shocks without permanent injury so used in chains, crane hooks and railway couplings For parts that rust easily like water pipes, sewers, drain pipes etc. Making such parts of machines as are not likely to be subjects to shocks or tension Lamp posts, columns and railings Uses Steel Wrought iron Cast Iron

17. Stress strain curve

18. Structural steel sections Hot rolled sections

20. bolting Most common method in joining structural is bolting:

25. Applications 11. Circular vent 12. Vehicle door 13. Pedestrian door 14. Window 15. Roof light 16. Canopy 17. Parapet 18. Crane beams and rails 19. Bridge crane 20. Mezzanine or Structural Floor 1. Portal Frame - Rafter 2. Portal Frame - Column 3. Wind bracing 4. Purlins 5. Wall Rails 6. Roof panels 7. Wall panels 8. Astrotherm insulation 9. Eave gutter 10. Monovent

31. Roof Panels

32. Wall Panels

33. Mezzanine

34. Purlins

35. Bridge crane

36. Circular Vents

37. Pedestrian door

38. Structural steel in buildings Airport terminal complex

39. A steel joist and king post truss system provide support for the 650,000sq. ft. roof.

40. This framing system creates wide-open, column-free spaces king post trusses form the lateral-force resisting system, eliminating the need for bracing and further increasing flexibility of the interior space.

41. Steel buildings- stadium

42. The upper tier, cantilevering 46' over the suite and club Levels supported by column groupings consisting of four massive steel HSS placed at the midpoint alternating structural bays.