What are the stabilizers on a crane called?
What Are Outriggers? Outriggers (sometimes called Stabilizers) are retractable hydraulic `legs’ that extend, like a spider’s legs, away from the truck before they make contact with the ground.
What do truck-mounted cranes used to increase stability?
Outriggers: Outriggers are retractable beams that increase the crane’s stability in stationary, lifting position. This component will distribute loads to the ground surface to make the heavy-equipment stable.
What is the difference between outriggers and stabilizers?
Stabilisers and outriggers have many configurations depending on the application and are used to minimise the risk of toppling when the centre of gravity of the combined load and vehicle is outside the support base of the vehicle. Outriggers lift the vehicle’s wheels off the ground while stabilisers do not.
What is crane outrigger?
Outrigger: A beam which extends from the lower works of a crane to increase the crane’s stability. The beams may be either extendible/retractible or fixed length and typically utilize some type of pad to distribute loads to the ground surface. ( Source: A Glossary of Common Crane and Rigging Terms.
What is hoist Reeving?
Reeving (rope): The reeving of the hoist is the path of the rope between the hoist and the load block. Double reeving is two parts of wire rope leading off of the drum, one from each end of the drum, creating a hook movement referred to as True Vertical Lift.
How are crane outrigger loads calculated?
Simply divide the maximum outrigger load by the allowable ground bearing pressure to determine the pad area you need. Example: Maximum outrigger load = 100,000 lbs. Allowable ground bearing pressure = 3,500 psf. (100,000 lbs / 3,500 psf = 29 ft2 of area).
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.
What is span blocking on a crane?
1926.1400 is a crane rule that addresses who should use supporting materials, commonly known as outrigger pads, crane outrigger pads, crane mats, cribbing and dunnage. 1926.1401 defines ground conditions and supporting materials.
How is crane load capacity calculated?
To calculate the crane capacity index, use this formula: (Average (radius x max (lifting height x capacity))) / 100. Let’s take a look at how these variables can affect your specific project.
How is maximum outrigger load calculated?
What is double Reeving?
Double reeving is two parts of wire rope leading off of the drum, one from each end of the drum, creating a hook movement referred to as True Vertical Lift.
What is the danger of eccentric boom Reeving?
When reconfiguring the reeving on the load block, the parts of line need to be evenly spaced on both sides of the hook to prevent the block from tilting when picking up a load. Flange damage to the sheaves can result from operating like this. The improperly reeved wire rope on the boom tip can cause the boom to twist.
What kind of truck has a stabiliser in it?
In February 2018 a truck, fitted with a vehicle loading crane (VLC), was driven along a road with its stabiliser extended. The stabiliser struck a parked vehicle, and a worker standing behind this vehicle was crushed and killed.
How does a manual load lowering crane work?
Manual cranes require you to align the load, walk back to the controls, lower the load, and perhaps do this two or three times for every lift. Many building sites require a person alongside the load to monitor its lowering requiring either radio control, or second man in the truck.
How is a truck mounted loading crane rated?
All cranes are rated by their “Tonne/Meter” rating, or the tonnes to be lifted, times the number of meters of reach required. Eg, Lifting 800kg at 15meters (from the centre of the crane, not the edge of the truck) of reach, requires 0.800 x 15 = 12 tonne/meters.
When did a stabiliser on a truck kill a cyclist?
The stabiliser struck a parked vehicle, and a worker standing behind this vehicle was crushed and killed. A similar incident occurred in 2013, when a manually-operated stabiliser on a truck, fitted with a vehicle load crane, unintentionally extended while travelling on a public road and killed a cyclist.