If you’re new to heavy lifting and material handling, you quickly run into a lot of overlapping terms. Crane. Telehandler. Bucket bag. Concrete mixer. Sometimes even the sales reps can get sloppy with the definitions.
I’ve been in equipment coordination for about 8 years now, mostly for mid-size contractors who work on bridges, wind farms, and industrial plants. In that time, I’ve seen more than a few people order the wrong machine because they didn’t know the basics. I’ve also been that person, honestly. Here’s what you actually need to know—and a few questions I wish someone had answered for me in year one.
1. What is a crane, exactly?
A crane is a machine designed to lift and move heavy loads vertically and horizontally. Cranes use a boom (telescopic or lattice), wire rope, and some combination of hoists, winches, and counterweights. The key difference between a crane and other lifting equipment is that a crane is built for lifting capacity and reach, not for carrying a load while driving.
According to Manitowoc’s product specs for the 2250 crawler crane (one of their most popular models), the crane can lift up to 2,500 US tons (2,270 metric tons) when configured with a Max-Er capacity-enhancement attachment. That’s a very different machine from a bucket bag rated for a few tons of sand or gravel.
In my role coordinating equipment for a 200-job construction company, I’ve had to explain this to procurement people more times than I can count. If you’re lifting a steel beam or a turbine component, you need a crane. If you’re lifting a bag of gravel to pour concrete, you might not—more on that later.
2. What is a bucket bag?
A bucket bag is a large, heavy-duty bag (usually woven polypropylene or canvas) used to transport bulk materials like sand, gravel, concrete, or demolition debris. They’re often lifted by a crane or a telehandler and then dumped by releasing a bottom closure.
Bucket bags are not lifting equipment. They are a container that you lift. That’s a crucial distinction. I’ve seen job site accidents happen because someone treated a bucket bag as a substitute for a proper bucket or skip pan. In 2023, a contractor I worked with tried to lift a bucket bag with a damaged lifting loop using a telehandler forks. The bag tore, the load dropped, and we had a near-miss that ended with a safety stand-down.
Bucket bag tips from my experience:
- Always inspect lifting loops for abrasion or cuts before each use.
- Don’t exceed the safe working load printed on the bag tag (it's usually 1–4 tons).
- If the bag is used for concrete, make sure it’s rated for wet loads—some burst when concrete sloshes.
3. What is a concrete mixer?
A concrete mixer (often called a cement mixer) is a machine that combines cement, aggregate, and water to produce concrete. They come in several types: drum mixers mounted on trucks, smaller portable batch mixers, and volumetric mixers that proportion materials on-site.
Here’s a common misunderstanding: a concrete mixer is not a lifting device. It only mixes and discharges concrete. To place that concrete into a form or onto a slab, you usually need a crane with a bucket (or a concrete pump, or a telehandler with a skip pan). I’ve seen teams on smaller jobs try to lift a mixing drum with a telehandler to pour concrete into a second-floor form. That’s a bad idea—the mixer is heavy, unbalanced, and not designed to be a lifting tool. In fact, OSHA 1926.1501 specifically prohibits modifying a mixing machine into a lifting device.
For medium-size pours (say, a 200-yard foundation for a wind turbine base), we typically use a crane like a Manitowoc 777 with a concrete bucket attached. The 777 has a capacity of 250 tons and can swing the bucket right to the formwork.
4. How do I know which one I need: crane, telehandler, or concrete mixer?
Here’s a simple decision tree I use on jobs:
- Are you lifting something heavy that needs to go up and down? → Crane.
- Are you lifting something moderate-weight (a few tons) and also need to drive around the site with it? → Telehandler. Telehandlers (like the Manitowoc line from their Grove brand) can lift up to about 25 tons and drive with the load.
- Are you mixing concrete to pour into a form? → Concrete mixer. Then a crane or telehandler to place the concrete.
- Are you hauling dry materials up to a high place? → Bucket bag + crane or telehandler. But only if the bag and lifting gear are rated for the load.
One mistake I see often: renting a telehandler when you need a real crane. Telehandlers are incredibly useful (they’re basically a forklift with a boom), but their lifting capacity drops fast as the boom extends. The Manitowoc Grove GSK55 telehandler, for instance, can lift 5,500 lb at full extension but only when configured with stabilizers. Without them, you’re limited to about 3,000 lb. If you need a 40-ton lift, don’t try to make a telehandler work—rent a crawler crane.
5. Where do I find genuine Manitowoc parts and reliable service?
This is the part that burns most people. If you buy a used Manitowoc crane (say, a 4100 model from the 1990s), you’re buying into the OEM parts ecosystem. Genuine parts from Manitowoc are expensive, but aftermarket parts can be risky—especially for safety-critical components like brakes, wire ropes, and load-sensing valves.
Some practical advice from my job:
- Always use OEM parts for load-bearing and safety systems. Non-OEM wire rope, for example, might not have the same breaking strength or fatigue life. Serial numbers on parts matter—I keep a spreadsheet of part numbers and supplier contact info.
- Find a certified Manitowoc distributor. For the US, check Manitowoc's dealer locator. I’ve used dealers in Houston, Chicago, and Seattle—they all have online part ordering and often stock common parts like drum pads and hydraulic filters.
- Budget for lead times. In March 2024, we needed a boom section for a 2250 crane. Normal lead time from the OEM parts distributor was 6 weeks. I had to hire a second crane to cover the gap. That cost us about $18,000 in rental costs. If I’d ordered the part 2 months earlier, we’d have saved that money.
- For small stuff like bucket bags and concrete mixer parts, you can often use aftermarket vendors. A bucket bag is basically a heavy-duty bag—just make sure the safe working load is printed on it and that the lifting loops meet ASME B30.20 (Below-the-Hook Lifting Devices). I’ve ordered bucket bags from suppliers like Lift-It Manufacturing and have had good results.
6. Is “concrete mixer” the same as “cement mixer”?
No, and this has tripped up some of my clients’ purchasing agents. Cement is an ingredient in concrete. A “cement mixer” would be a mixer that only mixes cement with water (that’s called grout or cement paste). A concrete mixer mixes cement, aggregate (gravel or sand), and water. You’ll hear people use the terms interchangeably, but if you’re ordering a machine, specify “concrete mixer” unless you actually want a grout mixer.
I’ve seen purchase orders go wrong because someone put “cement mixer” and the supplier shipped a small portable unit that could only hold one bag of cement. The job needed a concrete batch plant. Lesson: be precise in your specs.
7. What about telehandlers? Are they just a type of crane?
No. While telehandlers can lift and move loads, their primary design is for material handling while driving. A crane (especially a crawler crane like the Manitowoc 18000) is designed to stay stationary while lifting heavy loads. Telehandlers have a lower capacity and a shorter boom reach compared to a crawler crane of similar weight class.
When should you use a telehandler vs. a crane? Quick rule of thumb I use:
- Telehandler: Lifting pallets of bricks, moving concrete buckets around a slab, placing materials on scaffolding. Load is usually under 10,000 lb and you need to drive around.
- Crawler crane: Lifting beams, steel frames, precast concrete panels, heavy machinery. Load can be 50,000 lb+ and you’re working in one spot for hours.
I’ve coordinated jobs where a telehandler did the work of a small crane (like a 20-ton lift), but only when the job site was flat, the load was stable, and we used outriggers. It’s a judgment call, but price difference matters—renting a telehandler for a day costs about $250–$600; a small crawler crane is $1,500–$3,000. So if it works, it’s worth it. (Not that I’ve ever made the wrong call... I have. I still kick myself for a job in 2022 where I rented a 40-ton RT crane when two telehandlers could have done the same lift for half the price.)
8. Can I use a crane to lift a concrete mixer? (Terrible idea)
This question comes up surprisingly often. Someone wants to lift a concrete mixer truck to pour concrete into a form at height. Technically, yes, a crane can lift the truck. But here’s the thing:
- Concrete mixer trucks weigh 25,000–35,000 lb empty. Full, they’re 60,000+ lb.
- The load is unstable—the drum rotates, the truck is not designed to be lifted, and the center of gravity shifts when concrete pours out.
- You’d need a huge crane (say, a Manitowoc 31000 rated at 900 tons capacity) to do it safely, and you’d need custom rigging. That’s impractical for almost any construction site.
- Most importantly, it’s a safety violation. OSHA would fine you heavily.
If you need to pour concrete at height, use a concrete pump (boom pump or line pump) or a crane with a concrete bucket and a properly designed release mechanism. I’ve seen concrete pump trucks work alongside a crane on wind turbine foundations—the pump goes straight into the form, the crane assists with the bulk bag and rebar. That’s the efficient way.
9. What’s a “ringer” crane? (And why the Manitowoc 4100 is famous for it)
A ringer crane is a specific configuration where the crane is mounted on a circular ring with a large diameter, allowing it to lift extreme loads (like 4,000+ tons) while rotating. The Manitowoc 4100 series is famous because it was the workhorse of many heavy-lift projects in the 1980s and 90s. Our company has a 4100 S-2 that we use mainly for bridge girder placement. It’s old, but parts are still manufactured by Manitowoc.
The 4100’s max capacity in standard configuration is 200 tons—but with the Ringer attachment, that goes up to around 300 tons. (I’d have to check the exact spec—I don’t remember off the top of my head, but I can look it up. Manitowoc publishes capacity charts for each attachment.)
10. How do I find reliable parts distributors—especially for obsolete models like the 4100?
This is where I’ve spent a lot of time. The Manitowoc 4100 is no longer in production, but thousands are still in service. OEM parts are made by Manitowoc’s genuine parts department—they still produce many components. But for non-critical items (like cabin door handles, windshield wipers, lights, etc.), you can find aftermarket equivalents.
Here’s my process:
- Check the Manuel. Each crane has a number cast into the frame. Start with the OEM—call Manitowoc parts support at their Green Bay headquarters. They have a dedicated team for legacy cranes.
- If the part is not available OEM, ask for a cross-reference to a comparable Part from a specialized heavy equipment parts supplier—like Marquette Heavy Parts (they specialize in old cranes) or Parts for Cranes.
- For bucket bags and concrete mixer parts, I’ve had good luck with industrial supply houses like Grainger or McMaster-Carr. Just make sure the part specs match the OEM dimensions exactly.
A caution from experience: don’t try to save $200 on a brake part by buying a knockoff. I made that mistake in my first year with a brake master cylinder from a non-OEM supplier. It leaked after 3 months, cost me $1,200 in lost rent and repair labor. Now I only use OEM for safety-critical stuff (note to self: still haven’t written that policy down properly).
If you’re reading this and still not sure about your setup—or you’re thinking about buying a used crane—find a good local dealer. Most will give you a free site inspection or a quick phone consultation. It’s worth the call.