Crane Capacity and Reach, Explained Without the Jargon

What a Ton Rating Actually Describes

When a crane is called a 22-ton or a 40-ton machine, that number is one specific measurement: the most it can handle at its shortest working radius, fully rigged, on firm level ground, with the outriggers all the way out. It is the best case, measured at the one point where the crane is strongest.

It is a headline number, not a promise about your job. Almost no real lift happens at the shortest radius, because the load has to go somewhere, and somewhere is always out away from the truck.

This is the single most common misunderstanding in the trade, and it is worth being blunt about. A 40-ton crane will not lift 40 tons out over a house. It will not lift anywhere near that. The rating tells you which machine is in the conversation, and nothing more.

Radius Is the Number Nobody Brings to the Call

Load radius is the horizontal distance from the center of the crane's rotation to the load hanging on the hook. Not the boom length. Not the height. The flat distance across the ground.

Capacity falls off as radius grows, and it does not fall gently. Doubling the distance out does far more than halve what the crane can handle, because the load is working on a longer lever against the machine. A weight that is routine at close radius can be out of the question at long radius on the same truck.

Height matters much less than people assume. Lifting a load straight up alongside the truck is comparatively easy. Reaching out over a two-story house with a block wall behind it, so the truck has to sit in the street and the landing spot is well back in the yard, is a completely different problem. The geometry decides it, not preference.

That is why the useful thing to measure before you call is not how tall the house is. It is how far back from the street the item has to land.

142 Feet Is Reach, Not Reach With a Load

Maximum reach on these trucks is 142 feet. That figure describes how far the boom can be extended. It does not describe what can hang on the end of it at that extension.

Think of it as the outer edge of where the hook can physically go. As the boom extends toward that edge, the amount it can carry keeps dropping. At the extremes, the boom is reaching for position and distance rather than for weight.

This is genuinely useful information, not a disappointment. A lot of jobs are about getting a modest load into a place with no other route: over a wall, across a pool, onto a second story balcony, down into a courtyard. For those jobs, the reach is the point and the weight is easy.

Weight, Distance and Room, Together

Three things decide which crane comes out, and none of them works on its own.

Weight is the obvious one. Horizontal distance from where the truck can safely sit to where the load has to land is the one customers rarely have ready. Setup room is the one nobody thinks about until the truck is on site, because outriggers need to extend, and how far they can extend changes what the machine is allowed to lift.

Those three interact in ways that surprise people. A light load a long way out can require the bigger truck. A heavy load close in may not. A job that would be simple from the driveway can become the hard version of itself when the driveway turns out to be over a utility trench and the truck has to work from the street instead.

• Weight of the item, including anything in it or on it
• Horizontal distance from the truck's working position to the landing spot
• How much room there is to extend the outriggers
• What has to be cleared on the way: roof, wall, wires, structure
• Whether the ground under the pads will carry the load

The Chart Governs, and the Operator Reads It

Every crane comes with a manufacturer's load chart. It lists what the machine is permitted to handle at each combination of boom length, radius and outrigger position. There is not one chart, there are several, because the numbers change with the configuration.

The operator reads the chart for the exact setup on the day, and deducts the weight of the hook block and the rigging before comparing anything to the load. The chart is the governing document. It is not a starting point for negotiation and it is not something judgment overrides.

This is also why a firm capacity answer over the phone, before anyone knows the radius, is not a real answer. What can be given quickly is a straight yes or no about whether the job is in range once you supply the weight, the distance and a few photos. If the numbers do not work, you get told that rather than finding out when the truck is already parked.