Rigging Calculator: Crane Lift

Lifting on the iron - what is the rated capacity at 38 ft? 5 crane load charts on your phone, with critical-lift thresholds and load %. $4.99 one-time, no login.

Built for crane operators, riggers, and lift directors who need quick capacity verification on the iron - not a dashboard you log into.

WHAT IT DOES Looks up rated capacity at any operating radius for 5 common crane configurations using built-in load chart data with linear interpolation. Compares total rigged load against rated capacity and flags critical-lift thresholds before the hook leaves the ground.

CRANES INCLUDED

• 30-ton Rough Terrain
• 50-ton Rough Terrain
• 80-ton Rough Terrain
• 130-ton Rough Terrain
• 200-ton Crawler

INPUTS

• Crane model (picker)
• Load weight (lb)
• Rigging weight (lb, default 500)
• Operating radius (ft)

RETURNS

• Rated capacity at the entered radius (tons)
• Total rigged load (lb and tons)
• Load as a percentage of rated capacity
• Critical-lift status: under 75% (green), 75-90% (yellow), 90-100% (orange), over capacity (red)
• Full load chart for the selected crane

WHY THIS APP, NOT THE FREE ONES

• Math is shown - every result lists the chart entry and the load ratio. No black box.
• Color-coded thresholds - see at a glance whether you are approaching critical-lift territory.
• Works offline - yard moves, refinery turnarounds, and remote sites. Always available.
• No login. No telemetry. No subscription.

PRICING $4.99. Pay once, own it. Will not disappear when the company kills the SaaS budget. Lifetime access on iPhone and iPad via Family Sharing.

NOT A SUBSTITUTE FOR The crane manufacturer's published load charts for your specific machine. The lift director's sign-off. A site-specific ground bearing capacity assessment. This app is a quick-reference tool, not a replacement for the official load chart taped to the cab.