Outrigger Pads: How To Spec Pad Size

Most of the time selecting a size of Redco outrigger pads isn’t rocket science: you get pads with the same length x width that came with your equipment. However, when for whatever reason this is not possible, there is some simple math you can do to figure out a safe outrigger pad size*. You first need to know the softest type of ground you may put your pads on. In general, 20-22 PSI (virgin soil) works well. Next, you need to take a look at a decal that should be on your outrigger pad feet. It should say a maximum force that foot could put on the ground.

Finally, you need to know the area of the outrigger pad you want to place your outriggers on. Here are the most common measurements:

18″ x 18′ = 324″

24″ x 24″ =576″

36″ x 36″ = 1296″

42″ x 42″ = 1764″

48″ x 48″ = 2304″

Let us work through one example. Assume the decal on your outrigger foot reads 30,000 pounds as it’s maximum force that could be applied. Let us consider the 24″ x 24″ pads, the math goes like this: 30000 / 576 = 52.08

52.08 is the PSI is the pressure at max load the foot would be putting on the ground through the pad. This is too much force for virgin soil, so we must go larger. We then consider 48″ x 48″ pads:

30000 / 2304 = 13.02

Much better! 13.02 is far below the 20-22 PSI we’re looking for and should be a safe amount of load to put on the ground in most situations. And it’s always better to be safe than sorry with a crib.

For a quotation on our Redco Outrigger Pads, please contact us.

*These guidelines come from the October 26th, 2005 “Safety Bulletin” by the American Concrete Pumping Association. Redwood Plastics accepts no liability for use of this information leading to a poor crib or accidents. As always, the operator of equipment has sole discretion on how to create a safe crib.


Specifying Outrigger Pads

When customers consider a switch to plastic outrigger pads they sometimes don’t know where to start in how to get their quotation. Often we’ll be told that the customer has a certain piece of equipment and to spec a pad size and thickness for them but this over-complicates things a little. Regarding the size of the pad the simplest way is to just get the plastic pads with the same dimensions as the stock pads that came with your rig. If you don’t have your stock pads we can help you out but we do need to know the area of your outrigger feet (length x width and are the feet square or round?).

Thickness is a little trickier to specify. UHMW plastic, commonly used for outrigger pads, is virtually unbreakable but having a pad that is too small and thin may lead it to bend around the outrigger foot as it is more flexible than wood and this may destabilize the rig. A general rule of thumb for most vehicles in the 20-50 ton range is to go with 1.5″ thick pads. 2″ thick is usually good for 50-70 ton but using 2″ pads for lighter equipment will result in less flex with the pad and a more stable lift. Above 70 ton 3″ thick pads are strongly recommended. To reiterate: the plastic will most likely not break on a thinner pad; however, the amount of flex may be undesirable. This is partially dependent on where the pads are being used – we have certain customers who only ever lift on concrete surfaces and thus can use a thinner pad because it has more support. Customers who lift on soggy soils may need thicker pads. As always, we refer to OSHA in that lifts should only ever be done on stable, level, ground.

For questions about our Redco Outrigger pads or to get some pricing please contact us for a quote.

Economical Anti-Slip Outrigger Pads

Redco™ outrigger pads are a premium plastic product which has proven their value over many years of service in tough environments. But over time products become refined and improved, often due to further meet our customer’s requirements. In the past we had offered our LUNS premium anti-slip surface outrigger pads. LUNS is a military-grade, anti-slip surface that has a clean coal-slag surface cast alongside the plastic. This creates an anti-slip option where the surface is integral to the UHMW polyethylene and cannot be separated.

While the LUNS product is popular with medium and large customers, there are minimum orders on material that do not suit some of our customers. Therefore, all of our branches now have access to an in-house anti-slip option that is economical and effective as an alternative for LUNS for smaller orders. The way this anti-slip is done will vary by branch – some offer a machined grooved surface, others use a type of sanding technique. Both techniques are not affected by minimum order requirements.

For more information on our outrigger pads or to request a quote contact us today.


Block of LUNS anti-slip material



Switching For Safety

North America is finally beginning to thaw after our brutal winter.  In areas in the Midwest, Central Canada and the East Coast – crane rental companies, concrete pumpers and even tree service crews are getting ready to take advantage of the upcoming 2014 work season. This is the time of year our customers consider new equipment purchases and Redco™ Outrigger Pads are an excellent investment. These pads are very popular in Europe where wooden pads are illegal in several countries. Wood – while cheap – is an organic material that will rot and could put people and equipment in danger. Unfortunately, North America lags in this simple safety solution that makes sense.

Redco™ Outrigger Pads, made of the engineering-grade plastics UHMW or cast nylon, will not rot, rust or supportRedco_PadRedco_Pad moldRedco-outrigger-pad growth. They are UV-stabilized and will provide many years of use. Unlike wood, plastic pads get stronger in cold weather. Money is saved over the long-term as wooden pads do not need to be purchased or made – all that time and/or money adds up. However, your crew also has piece of mind that the critical load of the crane rests not on crack-prone plywood but performance plastic instead.

The outrigger pads are available in a number of options*. Pads can be machined with an anti-slip surface or made out of our superior LUNS material using a non-toxic, integral, coal-slag surface. Pads can made square or round and we can manufacture them from 12″-48″ in diameter.

Contact us for a quote or email us at sales@redwoodplastics.com with any questions.


Anti-Slip Outrigger Pads

Our Redco™ UHMW outrigger pads are one of Redwood Plastics’ best selling products. Over the last ten years of manufacturing these outrigger pads have proven their worth replacing wooden and metal pads, avoiding many disadvantages of those pads: ours do not rust, rot, support mold or fungal growth and in ten years, to our knowledge, none have broken or required replacement. They are a popular investment for good reason.

For regular duty, standard black UHMW pads are fine. However, certain clients of ours work on inclines often or are required by their safety personnel to procure the safest option possible. Redco™ anti-slip outrigger pads are the answer. Unlike competitors, who grind the surface of the pad or use chemical adhesives, our anti-slip pads can be made out of a military-grade material originally used on American naval transports. In fact, the first application of the material in a tank carrier is still operational today – without replacement – after 24 years of continuous service. If it can handle heavy armor tracking over the surface: it can certainly handle your crane or concrete pump!

Our material is a sharp coal slag that is layered on top of the gelatinous UHMW during its manufacturing. Therefore the slag is integral to the UHMW and cannot be separated. Better yet, the UHMW can be produced with this slag on both sides creating an even more effective anti-slip surface. Outrigger pads made with this material are an excellent safety solution for your business and the price is very reasonable. There is a lead time of 6-8 weeks in order to get this premium material produced, shipped to us, and manufactured into outrigger pads so if you have interest – we advise requesting a quote as soon as possible.

For a quotation or a sample of the anti-slip material please contact us:


CDN/USA: (604) 607-6015