Lift capacity: measurement points, tipping labels and attachment charts

A rated operating capacity, static tipping load, hydraulic force and chart allowance describe different tests or operating restrictions. Keep the manufacturer’s label and configuration attached to each value instead of calling them all lifting capacity. An apparent numerical advantage may disappear when the measurement point, load center or rating basis is matched, and none of these labels authorizes using an attachment outside its own approved limits.

The non-current North American S740 specification lists 3,100 lb rated operating capacity and 6,200 lb tipping load. The first is half the second in this example. That relationship does not turn tipping load into a permitted carried load or supply a universal capacity fraction for every tracked or wheeled machine, attachment and operating condition.

Bobcat’s Oceania T76 specification lists 1,378 kg rated operating capacity at 35% of tipping load and a separate 1,969 kg figure at 50%, with 3,937 kg tipping load. Keep the regional model and percentage with the number. The larger fraction is not an automatic substitute for the applicable operating rating or an instruction to select whichever figure accommodates a proposed load.

The Cat 950 specification lists 24,694 lb static tipping load at full 40° turn with tire deflection and 26,369 lb without deflection. Subtraction gives a 1,675 lb difference between published conditions, not extra approved bucket payload. Retain the turn and deflection labels in a comparison instead of treating either tipping figure as a carrying limit for an unspecified loader configuration.

Assume a 1,000 lb load with a horizontal distance of 2 ft from a stated tipping line: its moment is 2,000 lb-ft. At 3 ft, the same load gives 3,000 lb-ft, a 50% increase. This illustrates distance sensitivity only; hydraulic, structural and stability limits still require the actual machine rating rather than a capacity invented from this simple moment calculation.

The measurement position belongs to the rating. A loader’s figure at the pins does not describe the same load point as a rating a stated distance ahead, and lift height can also differ. Record the position and height with the attachment and load center before comparing machines; a rear three-point linkage figure is another measurement arrangement and cannot be substituted for a front-loader capacity.

Genie’s chart-reading guidance directs the operator to the chart corresponding to the attachment in use. Identify the actual machine and serial applicability, attachment and support arrangement, then locate the required height and outreach on that chart. A chart for another carriage, bucket or lifting attachment does not establish the approved capacity of the installed combination even when its maximum headline load looks similar.

The GTH-1056 manual, ninth edition, second printing, February 2024 includes separate CAT-attachment charts with stabilizers up and down. Their listed capacity zones span 300–10,000 lb and 3,000–10,000 lb respectively. Those ranges do not identify a capacity at a particular height and outreach; use the actual chart, configuration and instructions rather than interpreting a range endpoint as a rating throughout the envelope.

Use the manufacturer’s coordinate references, units and applicable attachment chart to locate the required load position. Keep the load weight and center of gravity with the plotted position and support configuration. A maximum-height specification or a single capacity zone elsewhere on the diagram does not establish capacity at that coordinate, and an absent chart value should not be filled by an assumed interpolation or a neighboring attachment’s diagram.

Follow the actual chart notes and capacity definition for what is included and what must be deducted. A stated allowance can already account for some equipment while requiring other attachment or rigging weights separately. Avoid both omitted loads and double counting, and establish actual weights rather than using an arbitrary percentage; a guessed deduction cannot resolve an unknown attachment identity or an unapproved combination.

An excavator’s breakout force and reach describe different quantities from its lifting chart. A tractor’s ability to pull also does not establish its lifting capacity, and a towing performance figure cannot resolve a trailer’s braking or road limits. Use the rating for the intended action and load point instead of converting a force or machine weight into an unsupported capacity claim.

Obtain the correct information for the actual machine, serial range, attachment and configuration before making the lifting decision. A product brochure or nearby model’s chart can explain terminology without supplying the missing approval. Do not use a simple moment example, tipping percentage or remembered maximum as an operating limit when the manufacturer’s applicable rating and required conditions have not been established.

Keep machine identification, source, load position, attachment, measurement label and supporting conditions in the same comparison row. Include the relevant chart notes and equipment deductions with the intended load. That record distinguishes a documented option from an unresolved configuration and prevents a shortlist based on numbers measured at different points, fractions or support arrangements from becoming an unsupported lifting instruction.