What Size Outrigger Pads Do I Need?

An outrigger pad should be at least three times the square surface area of the outrigger shoe or float, provided you are working on Grade A soil conditions. As soil conditions worsen, continue to create a bigger footprint using outrigger pads and cribbing.

How do you calculate mat size for outrigger loads?

Crane mat size can be calculated by dividing the crane load by the maximum permissible ground pressure. Not only do crane mats used for distribute outrigger loads need to be suitably sized they also need to be strong to withstand the load imposed by the crane outriggers.

How is outrigger load 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).

Does OSHA require outrigger pads?

According to OSHA, safety is always a requirement. OSHA 1926.1402 states that, in all instances in which a crane or other lifting equipment is used, the ground on which the equipment is placed must be firm, sufficiently drained, properly graded, and able to support blocking, cribbing, and outrigger pads.

What is the purpose of outrigger pads?

The outrigger pad is used to displace the point of contact pressure PSI/ PSF that the ground sees. The outrigger pad expands & displaces the point of contact from the equipment’s outrigger/ pontoon/ shoe/ float. This will decrease the PSI or PSF for the GBC ( ground bearing capacity).

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.

What is a crane pad?

Crane Pad: Manufactured single piece or unibody solutions used for outrigger support under outrigger enabled equipment for load distribution and stability. See DICA’s crane pads. Cribbing: Blocking materials that are used to increase the bearing area and height.

Are outrigger pads required?

Posted in Worksite Safety. An outrigger pad is a safety tool that can be used with any equipment that has outriggers, down jacks or stabilizers. It is a must for stability when a piece of equipment – such as a crane – lifts loads or personnel aloft.

How is crane load capacity calculated?

Measure geometric components

1. The standard calculation for maximum crane capacity is (r)(hC)/100.
2. R = Radius between the ground and load.
3. hC = Lifting height multiplied by the capacity.

What is span blocking on a crane?

Blocking (also referred to as “cribbing”) is wood or other material used to support equipment or a component and distribute loads to the ground. It is typically used to support lattice boom sections during assembly/disassembly and under outrigger and stabilizer floats.

What is the minimum size of wire rope allowed for lifting personnel?

All sheaves used in the boom hoist reeving system must have a rope pitch diameter of not less than 18 times the nominal diameter of the rope used. The operating design factor for the boom hoist reeving system must be not less than five.

What is the purpose of placing mats or cribbing under outrigger floats?

What is the purpose of placing mats or cribbing under or cribbing under outrigger floats? Distribute the force over a larger area. Where is the best location for leveling a crane?

Do cranes need to be setup on solid level ground?

You must not assemble or use a crane unless ground conditions are firm, drained, and graded to a sufficient extent so that, in conjunction (if necessary) with the use of supporting materials (such as blocking, mats, cribbing, or marsh buggies (in marshes/wetlands), the equipment manufacturer’s specifications for

What is a load chart?

Definition of 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.

What guidelines should you follow when using a crane with outriggers?

• If a crane has outriggers they should be used on every lift.
• All outriggers on a crane must be used if an outrigger load chart is being used for calculating load capacities.
• Even on ideal, solid ground always use outrigger floats or mats.
• Use of a crane’s outriggers is your choice.

When determining the gross load the best method is?

85%. When determining the “gross load” the best method is: Get an accurate load weight and add the rigging.

How much weight can a 50 ton crane lift?

All in all, it’s probably the most critical resource for any crane operator. For example, the Manitex TC50155S that we’ve already mentioned can lift 50 tons or 110,231 lbs. However, when the load radius is 100 ft, and the boom angle is 17 degrees, it’s capacity over rear is 3,950 lbs.

How much can tower cranes lift?

Generally, when anchored to the ground, a tower crane can’t be much more than 265 feet tall. They can be much taller if they are secured to a building as the building rises. The maximum jib reach is approximately 230 feet, and the maximum weight it can lift is 19.8 tons, or 18 metric tons.

What is lifting load chart?

Understanding how to read a crane load chart allows you to calculate the crane’s load capacity as it relates to the boom angle and length. Most lifts are planned using computer simulations these days.The chart only applies to lifts with all outriggers fully deployed, creating a 22′ 6” base for the crane.

How much does a crane pad cost?

The cost of the crane outrigger pads is typically reflected by the size and thickness of the pad. Although the purchase of crane outrigger pads may feel like an unnecessary expense at anywhere from $45 to $99 per square foot, the value of the pads far outweighs the price that could be paid without having them.

How do crane outriggers work?

When you operate a crane truck, you also operate hydraulic or manual outriggers. Outriggers keep your truck stable during any kind of lift by extending outward and making contact with the ground several feet away from the truck. This provides a solid, stable base by distributing the crane’s load over a larger area.