Calculate Vertical, Radial & Horizontal Forces for Lifting Lug Design

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SUMMARY

The discussion focuses on calculating vertical, nominal radial, and horizontal forces for a lifting lug design attached to a vessel weighing 1681.84 N. Participants emphasize the necessity of creating a free body diagram and applying trigonometry to derive these forces accurately. The geometry of the lug placement and the number of lugs used are critical factors in the calculations. Additionally, compliance with ASME BTH-1 standards is essential for vessels designed for use in the United States.

PREREQUISITES
  • Understanding of free body diagrams
  • Knowledge of trigonometry
  • Familiarity with lifting lug design principles
  • Awareness of ASME BTH-1 standards
NEXT STEPS
  • Research methods for creating free body diagrams in engineering
  • Study trigonometric applications in force calculations
  • Explore detailed guidelines in ASME BTH-1 for lifting devices
  • Investigate best practices for lifting lug placement and load distribution
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Mechanical engineers, structural designers, and safety compliance professionals involved in lifting device design and analysis.

zubir
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Dear Experts,

I have vessel with lifting lug attached to the shell.
Vessel weight = 1681.84 N

How to calculate:-
1) vertical force
2) nominal radial force
3) horizontal force
 
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Welcome to PF.

You need to draw a free body diagram and use trigonometry.
The details depend on the geometry of the situation - where the lugs are fitted, how many are being used, how the cables (or whatever) are attached etc.
 
If building vessels for the US, you'll also need to comply with ASME BTH-1, "Design of Below-the-Hook Lifting Devices".
 

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