Mobile cranes: load-radius charts, gross lifting loads and supported setup

Establish the load and lifting equipment, pick and placement positions, radius and height, clearances and site access. Select a supported configuration and chart at those positions. A machine that reaches the required height may still lack capacity at the required radius, while the largest catalog capacity cannot resolve ground support or a restricted setup area.

The Broderson RT-300-C technical sheet identifies 30,000 lb at a 10 ft radius and labels the capacity headline on outriggers. Retain the 10 ft radius and outrigger condition. The number is not an allowance at every radius, on tires or with another boom arrangement, even though the same crane is physically capable of moving or reaching those positions.

Check which operating point each limit describes. Read geometry and capacity together.

Maximum capacity, boom length and tip height may describe different configurations. The number of boom sections also does not establish a universal reach, stiffness or capacity ranking between different designs; the actual permitted extension and load information are needed.

Follow the chart’s definitions and inclusion rules for the object, hook block, rigging, attachments and other required items. With expressly assumed masses of 10,000 lb for the object, 800 lb for the block and 200 lb for accessories, the total is 11,000 lb. Use actual equipment weights for a planned lift.

Read what the applicable chart and rating already include before adding or deducting equipment. Double-counting an included item misstates the result, while omitting a required item overstates the remaining allowance.

Record each mass, lifting-point definition and chart note. A generic percentage cannot establish net capacity.

Establish the actual outrigger, on-tire or other permitted setup and the corresponding chart. Match each duty to its supported setup. Do not apply an outrigger chart to a traveling operation or assume a short-radius cell provides the headline maximum under every boom, direction and support condition.

Truck-mounted, rough-terrain, all-terrain and industrial or carry-deck arrangements can serve different access and working needs. Check road approvals and actual transport configuration. A category label helps identify candidate equipment but cannot certify travel across weak ground, use on every road or a particular load-handling operation.

Use the actual road or transport configuration, dimensions, axle loads and route requirements. Some moves need configuration changes, separate equipment or permits, while others use a different supported arrangement. A universal claim that every large crane travels with boom sections removed or that road speed follows from lifting capacity ignores the offered machine and planned route.

OSHA 1926.1402 addresses support and level conditions that meet the manufacturer’s requirements for covered crane operations. Check reactions and ground support separately.

Assess reactions, support materials and ground layers. A deployed stance or visible mat footprint cannot prove adequate support.

OSHA 1926.1417 retains manufacturer prohibitions and conditions for covered load travel, including competent supervision of permitted travel. Use the actual configuration, rating, boom and load position and controlled route. Wheels or a pick-and-carry description do not authorize every load movement, and a stationary chart cannot simply be transferred to a traveling duty.

Plot the crane, boom movement, counterweight envelope, support equipment, loads and required clearances against the site. Include site access and nearby traffic interactions. A maximum reach figure or compact carrier width does not establish that the machine can be positioned and operated without conflicts, or that the ground beneath every support can carry its reaction.

Request the same load positions, lifting equipment, chart configuration, ground and support scope, transport arrangement and operating responsibilities. Separate chart capacity from assumed timing and costs.