Properly reading a Tadano 30 ton crane load chart isn't about memorizing the maximum number on the page. It's about finding the capacity at your actual working radius, with outriggers set and the right configuration, and then subtracting the weight of everything between the crane hook and the load. That number—not the '30 ton' nameplate—is what tells you whether a lift is safe. If you don't know your radius, the load chart is just a piece of paper.
I've coordinated emergency crane work for more than eight years. The same mistake keeps showing up: people look at a 30-ton Tadano and assume it can lift 30 tons just about anywhere. It can't. It can lift 30 tons at a short radius, in the right setup, on firm level ground. Move the boom out a few more feet and the allowable load drops faster than most people expect.
You don't need to find 'are you smarter than a 5th grader questions with answers' to work through this. A load chart is less about trivia and more about basic arithmetic. The three numbers that matter are load weight, working radius, and configuration. Get those right, and the chart is straightforward. Get them wrong, and the chart can't save you.
The Only Load Chart Number That Matters
The first number to look for on a Tadano 30 ton crane load chart is the one at your actual radius. The chart lists radius across the top and boom length down one side, and each cell shows the rated capacity for that combination. That's the number to build your lift plan around, not the '30' printed in the model name.
Here's the part that surprises people: the rated capacity on the chart is the gross capacity. It includes the hook block, the slings, the shackles, and everything else hanging under the hook. So you subtract the weight of your rigging from the chart number before you compare it to the load. If your crane has a 600-pound hook block and you're using 300 pounds of slings and shackles, you need about 900 pounds of deduction before you get to the payload.
Measuring the radius is also less obvious than it sounds. The radius isn't measured from the bumper or from the outrigger pad. It's measured from the crane's center of rotation to the load's center of gravity. That can be several feet different from where someone standing on the ground looks at it. A few feet on radius can change the chart capacity by thousands of pounds.
Configuration matters just as much. The same 30-ton crane can have a load chart with one outrigger position, several boom lengths, a jib installed or stowed, and a different counterweight option. If you're checking the chart on a phone photo, make sure it's the exact chart for that crane serial number. A chart for a different model or a different counterweight setup isn't a close enough match.
Tadano rough terrain cranes are common in this size class because they're maneuverable on tight sites and the load charts are laid out cleanly. But an organized chart still has to be read. Check the notes at the bottom. Some charts are for outriggers fully extended, some for fully retracted, some with the jib stowed, some without. Using the wrong column is how you end up over the limit without meaning to.
What the Chart Assumes
What most people don't realize is that a load chart assumes a level, stable crane on firm ground. The chart is a machine limit, not a site limit. If the ground under the outriggers is soft, sloped, or not compacted, the actual safe capacity can be lower than the chart says. The same crane can be chartered for a 10-ton pick on one side of a building and not have the ground support for a 4-ton pick on the other side.
That's why I get cautious when someone says 'the chart says we can lift it.' The chart is the best starting point we have, but it's not the whole answer. The operator, the rigger, and the lift plan have to handle the rest.
The Emergency Checklist I Use
When I'm triaging a rush order and someone asks, 'can a 30-ton Tadano make this lift?' I don't reach for the chart first. I ask these five questions:
- What's the actual weight, including rigging?
- What's the radius from the center of rotation?
- Which crane configuration will be on site?
- What's the ground condition under the outriggers?
- Who's the operator, and have they worked with this load chart?
If those answers are solid, the load chart is easy to use. If they're not, the chart is where we find our limits—and sometimes we have to tell a client that a 30-ton crane won't work, and get a larger crane, or re-plan the lift. A supplier that can say 'this isn't the right crane' is more valuable than one that says 'well, it should be fine.'
Two Jobs That Show Why the Chart Is Only Part of the Story
In March 2024, a client called 36 hours before a Saturday event. They needed a fire truck lifted onto a lowboy trailer. The fire truck was well within what the Tadano 30-ton rough terrain crane could handle at the planned radius. The chart said the weight was fine. But the truck didn't have a single rated lifting point in the right place. The recovery eyes on a fire truck are for towing, not for lifting. We ended up using frame slings and a spreader bar, and we kept the swing slow. The load chart answered the weight question. It didn't answer the rigging question.
Another time, we installed an aerator in a water treatment tank. The unit had a paddle attachment bolted to the drive shaft, and the whole thing's center of gravity was off-center once it left the ground. The chart had enough capacity. But the paddle attachment made the load tilt as it lifted, and we had to set it back down and re-rig. A load chart can't predict a load that changes shape when it hangs from a crane.
These are the jobs that make me treat load charts as a discipline rather than a suggestion. The '30 ton' on the side of the crane is not a promise that every lift under 30 tons is safe. It's a rating that assumes everything is set up exactly the way the chart says.
The Deductions Everyone Forgets
Even with the right cell on the chart, you're not done. Here's what to subtract from the chart number before you compare it to your load:
- Hook block or headache ball
- Slings, shackles, and spreader bars
- Any other equipment hanging below the hook, like a bucket, man basket, or lifting frame
- Load-specific tools, such as a paddle attachment or custom lifting beam
If the load has an off-center center of gravity, that's not a simple subtraction problem. The chart assumes the load hangs vertically under the boom tip. When the center of gravity is offset, you need to adjust the rigging or add lateral forces into the plan, and that takes more than a load chart.
When Not to Trust a Load Chart
A load chart does not cover soft ground, wind speed, side loading, or two-crane lifts. It doesn't cover a damaged wire rope or a rigger who guesses at the load weight. It assumes the crane is in proper condition, the outriggers are fully and correctly set, and the operator is qualified for that crane.
Under OSHA's construction crane standard, 29 CFR 1926 Subpart CC, the operator has to have and use the right load chart for the crane and configuration. ASME B30.5 covers mobile crane load ratings. I'm not going to quote chapter and verse from memory—verify current requirements at the official sources before you rely on them on the job.
One more thing: a load chart is not a substitute for a lift plan. If you're doing a critical lift near power lines, over occupied areas, or with unusual rigging, get an engineer or a qualified lift planner involved. That's not overkill. That's risk management.
Bottom Line
A Tadano 30 ton crane load chart is a map of limits, not a magic number. Start with the radius and configuration, subtract the rigging, and be honest about site conditions. If a vendor quotes you a 30-ton crane for a job but can't show you the load chart with your radius circled, get another quote.
I'd rather work with a specialist who knows the limits of a 30-ton rough terrain crane than a generalist who says 'it'll handle it.' The vendor who tells you a load chart is just a formality is the vendor who hasn't seen a lift go sideways. That's the difference between buying crane time and managing risk.
