How to Work with a Crane: Tadano 25 Ton Crane Load Chart, Setup Checks, and Lift Planning

If you're standing in front of a Tadano 25-ton crane and need to get a lift done today, this checklist is for you. I'm a quality compliance manager for a construction equipment company. I review every lift plan and load chart that goes out to customers — roughly 200 per year. I've rejected about 12% of first submissions in 2025 so far because of missing radii, wrong chart versions, or loads nobody actually weighed.

This isn't a general how to work with a crane article. It's the checklist I run through with our operators and customers before a mobile crane moves on site. If you do nothing else, work through these steps.

Step 1: Use the Right Tadano 25 Ton Crane Load Chart

The first thing I check is the load chart version. Not all 25-ton Tadano cranes use the same chart. A GR-250N and a TL-250M can both be “25-ton class,” but boom lengths, outrigger widths, counterweight options, and jib configurations change the numbers.

What most people don't realize is that a load chart is tied to a specific machine configuration. In Q1 2024, we rejected a lift plan where someone pulled a PDF from an old dealer email. Wrong boom extension sequence, wrong capacity at 15m radius — it could have been bad. The correct chart is the one that comes with your machine, or from Tadano Cranes USA's parts and documentation portal for your exact serial number.

Here's what you need to know: a generic “Tadano 25 ton crane load chart” from a Google search is not enough. You need the chart that matches your unit's auxiliary winch, outrigger mode, and even tire pressure if the lift is on rubber. If the chart says “model-specific only,” it means it.

Step 2: Set Up on Ground That Won't Lie to You

A load chart assumes the crane is level. Actually, let me rephrase: it assumes the crane is level, supported on outriggers, and on firm ground. The ground doesn't know that.

Before extending the boom, walk the area. Look for soft patches, drainage trenches, and old backfill. In our 50,000 sq ft yard, there's one spot where the previous owner buried debris. It looks perfect, and it settles every spring. No chart can fix that.

Here's something vendors won't tell you: the truck can look fine parked and still fail under load. If the carrier starts lowering on one corner, or you see a squatted truck — rear end down, front higher, suspension compressed — stop. That's not normal squat. It means the outrigger blocking is sinking, or the frame is twisting. Re-level and use wider cribbing before you lift anything.

Step 3: Understand What the Chart Is Actually Saying

A 25-ton rating doesn't mean you can pick up 25,000 lb anywhere. The rated capacity drops as the load radius increases and as the boom extends. The chart gives you capacity at a specific radius and boom length.

Find your configuration line, read across to the radius, and look at the capacity. Then subtract all deductions. If the number is close to your load weight, it's not a good lift plan. In my audits, I want utilization at 75% or lower for lifts that aren't in ideal conditions. Some company policies allow 85%, but that leaves less room for rigging weight, wind, or an unexpected load shift.

It took me four years and a few hundred plan reviews to understand that “25 ton” is a class description, not a universal number. I once compared two 25-ton cranes side by side — same class, different boom lengths. The shorter-boom unit had higher capacity at close radii but couldn't reach the same pick point. That contrast made me realize why the load chart has to be read as a complete system.

Step 4: Calculate the Real Load Weight

This is where the load chart gets humble. The capacity is for the total load on the hook: the piece itself, plus the hook block, slings, shackles, spreader bars, and tag lines. People forget the small stuff.

Also, don't guess weights by vehicle class. A garbage truck can weigh far more than it looks like it should, and the center of gravity isn't where you'd guess. “Garbage truck” doesn't tell you the load configuration, either. If a job calls for lifting a truck body or a waste container, get the actual weight and a rigging plan from someone who knows. Don't rely on “we lifted one like this before.”

If you don't know the exact weight, you're not ready to work. A written lift plan should show weight, radius, capacity, and utilization. If any of those numbers is missing, I send it back. That's not bureaucracy. That's the habit that keeps people safe.

Step 5: Use the Range Diagram With the Load Chart

Most Tadano load charts include a range diagram on the same sheet. It shows boom length, radii, and hook height. Use it to confirm that your boom can reach the pick point and the set-down point without hitting the chart's boundary.

If the lift needs a jib or an extension, you'll usually need a separate section of the chart. Check whether the jib is offset and what that does to capacity. (Note to self: operators in the field love to skip this section. Don't.)

Step 6: Communicate With Signals and Stop Rules

A safe lift has one person giving signals and everyone else understanding them. If you're not using standard hand signals, use radios. But radio calls need to be explicit: “boom up,” “boom down,” “swing right,” “stop.” No one should be guessing.

Knowing how to work with a crane also means knowing when to stop. If you hear a strange noise, see an outrigger sink, or feel the crane shudder, set the load down and re-evaluate. There's something satisfying about a lift that finishes exactly as planned. There's nothing embarrassing about stopping one that doesn't.

Step 7: Do the Daily Check Before, Not After

The load chart is only as reliable as the crane's maintenance. Check wire rope for damage, look at the hook and latch, and confirm the load moment indicator (LMI) is working. If the LMI has an active fault, don't run the crane. It doesn't matter if the load looks light.

In our Q1 2024 audit, we found two units with outrigger pad pins worn past tolerance. The operators had “always done it that way.” We grounded both cranes until the pins were replaced. It cost time. It saved the company from a much worse outcome.

Common Mistakes and Notes

• Using a similar load chart for a different model. “It's basically the same” isn't a rigging plan. Get the correct chart for the exact machine.
• Setting up on a slope and leveling only with outriggers. The chart assumes a level frame. Side loads aren't the same.
• Forgetting that the chart is the substantiation for claims. Per FTC advertising guidelines (ftc.gov), claims need evidence. “Lifts 25 tons” is only true for the specified configuration.
• Skipping the paperwork. A plan that isn't written down is a guess. It should list the machine serial number, chart revision, load weight, radius, boom length, and utilization percentage.

Bottom line: a Tadano 25 ton crane is a serious piece of equipment, and the load chart is not a suggestion. If you're not sure whether your setup, load weight, or configuration is right, call a lift planner at Tadano Cranes USA or a qualified engineer. A specialist who knows their limits is more useful than a generalist who says “no problem.”