Spider crane lift plan example: an air handling unit lift in 3D
A 4K film from an RMT Solutions spider crane lift plan (example job). A Maeda MC305C-3 spider crane, outriggers at their maximum spread, lifts an 800 kg air handling unit on a 2-leg round sling at 4.0 m radius, slews it 50 degrees and lowers it to the set-down, at 57.8% utilisation of Maeda’s rated total load chart. The slinger / signaller signals each movement, then walks in once the slack is off and unhooks both legs.
The video is rendered from the same 3D model as the plan's drawings, so the machine, the radius and the load match the figures on the sheets.
The lift in figures
- Crane
- Maeda MC305C-3 spider crane, 8.1 m boom, outriggers at maximum (4.8 m base)
- Load
- 800 kg air handling unit
- Gross load
- 832 kg including the hook and rigging
- Duty
- 1.44 t on Maeda’s rated total load chart at 4.0 m radius
- Utilisation
- 57.8%
- Rigging
- 2-leg round sling, unhooked by the slinger once the load is landed and the legs are slack
Utilisation is the gross load, including all the lifting accessories, divided by the capacity on the manufacturer's chart for that configuration and radius.
Every RMT lift plan comes with drawings like these
An elevation, an exclusion zone plan, a rigging drawing and 3D views, drawn to the machine's real dimensions and written by a CPCS A61 Appointed Person with 35 years in lifting operations.
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Example job for illustration. It is not a site instruction or an approved plan for another lift: every lift needs a plan for the actual machine, load and site.