Crane Modeling using Excel Please make sure your computer can play sounds. You should currently hear...
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Crane Modeling using Excel Please make sure your computer can play sounds. You should currently hear a sound instructing you what to do next.
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Transcript of Crane Modeling using Excel Please make sure your computer can play sounds. You should currently hear...
Crane Modeling
using Excel
Please make sure your computer can play sounds.You should currently hear a sound instructing you what to do next.
CON 243 Heavy Construction Equipment,
Methods, and Materials
Lecture 25 (Chap. 17) — Cranes
The crane is the primary machine used for the vertical movement of construction materials.
SAFETYOSHA Crane fatality data:
• Energized power lines 50%• Overturning 19%• Load dropped 14%• Boom collapsed 12%• Two-block 5%
Crane Geometry
CounterweightC Payload
Pb a
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