Four point (single hook) lift design (as per DNV)

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Description

Four point lifts appear simple, but a slight dig reveals multiple constraints which they may throw up – load amplification factors, COG shifts, tilts in the cargo and type of sling.

This app puts all concerns to rest, with a comprehensive calculator for four sling lifts. It can be used to design a new lift configuration using four slings and single crane, or it can be used to verify an existing one. It follows the latest DNV-ST-N-001 guidelines.

  • It calculates the design load, the Dynamic Amplification Factor (DAF), and point loads
  • It checks the crane lifting capacity, tilt angle, and calculates the lift point load
  • The resulting forces and angles can be used to design/check the pad-eye for lifting
  • It also provides an elaborate sling design sheet based on DNV-ST-N-001
  • Sling Design can be done for Vertical Hitch, Choker Hitch or Basket Hitch

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