What is the black line on a crane load chart?

The bold line on the chart represents the separation of structural strength and stability. Any capacities below the bold line are limited by the crane’s stability. Any capacities above the bold line are limited by the structural strength of the crane.

How do you read a crane load chart?

How To Read a Load Chart

  1. DIMENSIONS and WEIGHT — The chart shows the crane dimensions. …
  2. LIFT CAPACITY — This is where the magic happens. …
  3. LIFT RANGE — Just as important as lift capacity is lift range. …
  4. LIFT ANGLE — This chart illustrates the maximum lift if a luffing or fixed jib is used.

What is line pull on a crane?

Line pull. The amount of rope a drum will hoist for a given layer. This illustration represents the available line pull and maximum winch speed for the crane. To determine the available line pull first determine the type of wire rope being used, then how many parts of line.

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What is crane capacity index?

In this document is explained how a “Crane Capacity Index” (CCI) can be determined. The CCI basically is calculated as follows: “Radius * Lifting Height * Capacity”. The result CCI is in Te ∙ m. To clarify calculations a Liebherr LTM 1100-5.2 is used as an example.

What must you know when using a load chart?

The load charts are specific to the make, model and configuration of a specific piece of equipment. Don’t forget to include adjustments for buckets, boom extensions, load blocks, hoisting rope and other attachments that will alter the lifting capacity of the crane or equipment used to perform the lift.

How is SWL of Crane calculated?

To calculate the SWL in kilograms of FSWR square the rope diameter (D) in millimetres (mm) and multiply by 8.

  1. Formula: SWL (kg) = D2(mm) x 8.
  2. Formula: D(mm) = √L(kg)

How much can a 50 ton crane lift?

Produced by Terex, the American HC 50 is a hydraulic crawler crane that’s nimble, yet, very capable of performing tough tasks. It has a 50 ton (45.4 t) max lift capacity, 160 ft. (48.8m) max lift crane boom length, and a 130+40 ft. (39.6+12.2 m) max lift crane boom & Jib length.

What is the end of a crane called?

JIB CRANE – A crane design whereby the bridge girder (commonly called the boom) is fixed at one end, allowing the opposite end to cantilever. The fixed end generally is hinged to allow rotation. LIFT – Maximum safe vertical distance through which the hook, magnet, or bucket can move.

How much weight can a mobile crane lift?

Our heavy crane selection can lift anything from 200 to 700 tonnes, while still being fully mobile. Although this weight cannot be lifted to the height of a tower crane, sometimes height has to be substituted for unrivalled lifting power.

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What is a hoist line?

A wire rope used in hoisting operations.

How much can a 40 ton crane lift?

It’s easy to tell how much a particular hydraulic truck crane can lift just by the name of it: A 40-ton crane can lift 40 short tons (80,000 pounds or 36,287 kilograms).

How far can a 30 ton crane reach?

Hydraulic Truck Cranes

Hydraulic trucks range from 30 to 600 ton capacity and feature a hydraulic boom that can reach lengths up to 200 feet.

How is tower crane lift capacity calculated?

It is the moment of the load lifted about the crane’s center. So moment = load * distance. A 300 tonne-meter limit can be inferred as a load of 10 tons being lifted at a distance of 30 meters from the center of the crane. So moment about the crane’s center is 10 tons * 30 meters = 300 tonne-meter.

What part of the crane is used to lift and lower the load?

Hoist – A mechanical unit that is used for lifting and lowering a load via a hook or lifting attachment.

What is load chart?

: a schematic and graphic device to indicate the amount of authorized work yet to be performed by a machine, a group, or any other producing unit in a factory.

Who is responsible for directing crane movements?

The lift director is described by ASME as the party that directly oversees the work being performed by the crane and the associated rigging crew. According to ASME B30. 5, a lift director must be onsite for all lifting operations.

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