Crane lift capacity check
Gross load against the load chart capacity at radius, and whether the lift needs a critical lift plan.
Expert check pending. This tool shows its formula, cited sources and assumptions with every result, and it's included in its role plan. A qualified expert in this trade hasn't signed the method off yet, so check the result against your own code, engineer or supplier before you rely on it.
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- Your own numbers, worked out as often as you like
- The full lift plan you can print or save to My work
- 6 cited sources, linked, with the checks to make
- Every other tool for the same role, in the same plan
- A plain-words read of your result (a fuller AI read with the Bifrost AI add-on)
Included in these role plans
Example result · fictional numbers
What you get: lift plan
Worked out by this tool from its default inputs. Its role plan lets you run your own numbers, print the sheet and save it.
Do not lift: mat too small for the ground (67.5% of chart, 4,907 lb per sling leg, 3,750 psf under the mat)
- Gross load
- 9,850 lb
- Percent of chart capacity
- 67.5%
- Verdict
- Standard lift: within your threshold
- Remaining margin
- 4,750 lb
Rigging
- Tension per leg
- 4,907 lb (8,500 lb over 2 legs at 60°)
- Angle factor
- × 1.155 over a vertical pull
- Sling rating
- Pass: 4,907 lb against 8,000 lb rated
- Sling angle
- Pass: 60° is the 30° minimum from horizontal
Also on the sheet
- Ground under the worst outrigger · 4 lines, starting with “Allowable bearing”
- Power line clearance · 3 lines, starting with “Line”
- Lift plan sign-off · 7 lines, starting with “Chart check”
The plain-words read of this example
The 9,850 lb gross load is 67.5% of the chart at this radius. Each of 2 sling legs at 60° carries 4,907 lb against a 8,000 lb rating. The worst outrigger puts 3,750 psf on the ground against 2,000 psf presumed for this soil; use mats at least 5.5 ft square. 25.0 ft away, outside the 20 ft zone for up to 50 kv. Do not lift: mat too small for the ground.
6 cited sources
- 29 CFR 1926.1408, Power line safety (up to 350 kV), equipment operations (Occupational Safety and Health Administration)
- 29 CFR 1926.1402, Ground conditions (Electronic Code of Federal Regulations)
- 29 CFR 1926.1417, Operation (Electronic Code of Federal Regulations)
- International Building Code 2021, Chapter 18 (Table 1806.2, presumptive load-bearing values) (International Code Council)
- ASME B30.9, Slings (American Society of Mechanical Engineers)
- Cranes and derricks in construction (Occupational Safety and Health Administration)
Plus 6 step-by-step checks, a print layout and a link that reopens it with your numbers.