How do you measure outrigger pads?

Asked by: Stacy Martin

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.

What is the standard size of outrigger pad?

Crane Outrigger Pad Size Chart

How do you measure a crane outrigger pad?

General Calculations to Determine the Correct Outrigger Pad (Blocking) Size:

1. Rule of 5: Take the maximum lifting capacity in tons of the unit such as 50 tons, divide that by 5 = 10 sq. ft. of cribbing or blocking.
2. Rule of 3: Take the square footage of the cranes fl oats and multiply by 3. Such as a 2×2 fl oat = 4 sq. ft.

How do you calculate outrigger?

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).

Are outrigger pads required?

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.

How do you read a crane load chart?

Back to How to Read a Crane Load Chart



As mentioned above, the left column signifies the lift radius. The top row signifies the length of the boom. Looking at where these rows and columns meet, you’ll see two numbers in each cell. The first number is the crane’s load capacity for the given boom length and lift radius.

What are outrigger pads made of?

Industrial plastic outrigger pads, like the ones engineered here at Cope Plastics, are made from an extremely tough polymer called UHMW (ultra high molecular weight) polyethylene. There are several reasons why UHMW outrigger pads outperform those made of hardwood.

What are outrigger pads used for?

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 are outrigger plates?

An outrigger pad is a thick piece of material used under the outrigger on heavy equipment to assist in stabilization and prevent destruction of the surface on which the heavy equipment is operating; both are required by OSHA.

How do you measure ground pressure?

Average ground pressure can be calculated using the standard formula for average pressure: P = F/A. In an idealized case, i.e. a static, uniform net force normal to level ground, this is simply the object’s weight divided by contact area.

What is the ground bearing pressure?

The ground bearing pressure or bearing capacity of soil is important because whenever a load is placed on the ground, such as from a building foundation, a crane or a retaining wall, the ground must have the capacity to support it without excessive settlement or failure.

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.

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.

Do cranes need to be setup on solid level ground?

Cranes must be set up and travel on firm, level ground. Working close to backfilled ground or an excavation may cause the ground sink or collapse under the exerted pressure of the outriggers, crane weight.

What is crane cribbing?

OSHA 1926.1401



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.

How high can you stack cribbing?

three feet

stack cribbing generally may be used to a height of less than three feet against a sloped surface with an angle less than 15°, or 30 percent.

What is dunnage on a crane?

Dunnage:Loose materials used to support, separate and protect equipment, parts, and accessories during storage and stabilization.

What is cribbing block?

Cribbing Blocks are sets of interlocking blocks, designed to withhold the weight of machinery safely during work or maintenance.

What type of wood is used for cribbing?

Wood cribbing can crush up to 20% of its height before failing. Based on their core material properties, soft woods such as Douglas Fir and Southern Pine are the most common types of lumber used for emergency shoring/cribbing.

Can a horse colic from cribbing?

Cribbing can predispose horses to colic, but was recently linked to one type of colic, epiploic foramen entrapment. This type of colic can cause death if not treated promptly by surgery.

Can horses stop cribbing?

Horses who have been cribbing for many years are unlikely to stop, but it is possible that managing a horse to reduce the stress in his lifestyle may diminish the behavior. Here are some things to try: Address any underlying discomfort. Some horses may begin cribbing to relieve gastric discomfort.

What is the difference between cribbing and Windsucking?

Windsucking is a similar behaviour to cribbing with the difference that no object is grasped in the teeth before the characteristic grunt is made. Because of their similarities the two behaviours are often classed together.

What can I put on wood to stop horses from chewing?

Farnam® Chew Stop™ Chew Deterrent. Stop wood chewing habits in horses with the hot, cinnamon taste of Farnam® Chew Stop™ – Aerosol or Liquid. Spray, paint, roll or brush on surfaces where horses chew, such as fences, corrals, stalls, mangers, gates, posts and tree bark.

How tight should a cribbing collar be?

NOTE: The neck strap does not apply the pressure to stop cribbing and should be adjusted only snug enough to keep the collar in place. Run the longer BROWBAND STRAP across the forehead just in front of the ears and buckle moderately tight.

Are cribbing collars cruel?

Cribbing collars are tormenting. They may discourage the behavior, but they do not relieve the urge. The hormonal response that results can lead to oxidative stress throughout the body, potentially harming vital organs, as well as joints and the digestive tract.

Which way does a cribbing collar go?


So as you can see it looks the same forward and backwards so it doesn't matter which way it goes on as long as this goes over the top of the neck.