Download
crane modeling n.
Skip this Video
Loading SlideShow in 5 Seconds..
Crane Modeling PowerPoint Presentation
Download Presentation
Crane Modeling

Crane Modeling

138 Vues Download Presentation
Télécharger la présentation

Crane Modeling

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Crane Modeling using Excel Please make sure your computer can play sounds. You should currently hear a sound instructing you what to do next.

  2. CON 243 Heavy Construction Equipment, Methods, and Materials Lecture 25 (Chap. 17) — CranesThe crane is the primary machine used for the vertical movement of construction materials.

  3. MOBIL CRANES(CRAWLER or WHEEL MOUNT) TOWER CRANES Types of Cranes

  4. Boom Mast Counter weight Rig Outriggers Mobil Crane Nomenclature

  5. Counterweight jib Load jib Counterweight Trolley Tower Crane Nomenclature Cab Tower (mast)

  6. Luffing jib Tower Crane configurations Saddle jib /hammerhead boom

  7. Details of Tower Cranes http://www.towercrane.com/tower_cranes_Detail_Select.htm

  8. SAFETY OSHA Crane fatality data: • Energized power lines 50% • Overturning 19% • Load dropped 14% • Boom collapsed 12% • Two-block 5%

  9. Crane Accidents: • 61.0% Overturning

  10. Crane Geometry

  11. Crane Geometry

  12. Counterweight C PayloadP Crane Geometry Tipping Moment TM= P x a Stabilizing Moment SM = C x b For stability: TM << SM SM is constant for a given position of the platform b a

  13. L C Over the front (front lifting)

  14. L C Over the rear (Rear lifting)

  15. Over the side L C Over the side

  16. Counterweight C PayloadP Crane Geometry Tipping Moment TM= P x a Stabilizing Moment SM = C x b TM = SM / safety_factor b a