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CE403 Construction Methodology

CE403 Construction Methodology

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CE403 Construction Methodology

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  1. CE403 Construction Methodology Steel Construction

  2. Metals: History • 500 BC - wrought iron in Greece • 6th Century – wrought iron in China • 1640s – 1st successful iron works in U.S. (Saugus, Mass.) • 1855 – Bessemer Process • 1867 – Ead’s Bridge • 1920 – Arc Welding

  3. Elements of Steel Construction • Advanced Planning • Steel Fabrication & Delivery to the Jobsite • Field Operations

  4. Field Operations • Unload and Handle • “Yarding”-Unloading & Temp Storage • Shake Out and Haul ~ Identify each member & store in organized manner • Assemble • Bolt Up • Impact • Check Out - Inspection

  5. Steel Erection Systems

  6. Camber & Sweep

  7. Types of Steel • A36 Carbon Structural Steel,FY= 36 ksi • A572 High-Strength Low-Alloy Structural Steel,FY= 42 ksi or 65 ksi • A588 Corrosion-Resistant High-Strength Low-Alloy Structural Steel,FY= 42 ksi or 65 ksi

  8. Rolled Steel Shapes

  9. W Shape: W24x62 24 is depth, 62 is weight Channel: C10 x 15.3 10 is depth, 15.3 is weight Angle: L5 x 3 x ¼ 5 and 3 are leg lengths, ¼ is leg thickness Rolled-Steel Shape Designations

  10. K-series – range in depth from 8” to 30”; designed to span up to 60’ LH-series (Long span) – range in depth from 18” to 48”; can span up to 96’; require 4”-6” of end bearing surface. DLH-series (deep long span) – range in depth from 56” to 72”; can span up to 144’; same bearing requirements as LH Open-Web Steel Joist

  11. Type of Joist Ends Long spans (LH) and deep long spans (DLH) typically require end bearing lengths

  12. Steel Connection Methods

  13. Steel Connection Methods • Drivers: • Constructability • Weld in shop; bolt in field • Economy • Structural Integrity • Local Practice

  14. High-Strength Steel Bolts

  15. Tension Control Bolts

  16. Welding Techniques • Majority classified as either: • Arc Welding – depends on heat of an electric arc established between an electrode and the components to be welded. • Resistance Welding – a shop process in which the components are butted together and heat is generated in the seam by resistance of the metal to passage of an electric current.

  17. Welding Techniques • Oxygen and Nitrogen in the air will produce a brittle weld. • Most arc processes shield the weld area from atmospheric contamination with a cloud of inert gas (most common gas in U.S. – helium. Argon is another alternative). • Shielded metal arc welding – most common arc process. • Uses a consumable metal stick electrode that is melted by the arc, deposits filler metal in the weld, and releases an inert gas around a weld area. TIG welding uses only a consumable filler.

  18. Stick Welding

  19. MIG Welding

  20. TIG Welding

  21. Welded Connections

  22. Welds Single and Double Groove Joint Variations

  23. Orbital Welding

  24. Weld Types

  25. Fireproofing

  26. Steel Plans

  27. Steel Plans

  28. Column Splices

  29. Beam-Column Connections

  30. Beam-Column Connections

  31. Steel Beam Systems

  32. Steel Beam Systems

  33. Beam-Girder Connections

  34. Beam-Girder Connections

  35. Moment or Shear Connection?

  36. Moment or Shear Connection?

  37. Moment or Shear Connection?

  38. Metal Decking Form Decking Composite Decking Cellular Decking

  39. Safety • Steel Erection is a hazardous construction task. • Causes of Accidents Among Structural Steel Workers – 2008 OSHA • Contact with Object – 51.1% • Falls – 19.2*% • Overexertion - 15.0%

  40. Protective Equipment • Hard Hats, Gloves • Eye Protection for worker engaged in welding, cutting, and chipping operations • Protective measures against falls. • Temporary floors with guard rails, where possible. • Lifelines (Lanyards) and safety belts • safety nets Body Harnesses

  41. CIS/2 • CIMSteel Integration Standards (CIS/2) • Product model and electronic data exchange file format for structural steel project information. • Allows structural drawings to be read in any vendor CAD package • CIMsteel – Computer Integrated Manufacturing of Constructional Steelwork • Endorsed by AISC