Five Trailer Sizing Tips for Excavators

Do your research to ensure the trailer meets the capacity of the excavator as well as state and federal regulations.

Not all trailers are created equal. It’s important to consider the quality of a trailer, not just the price tag.
Not all trailers are created equal. It’s important to consider the quality of a trailer, not just the price tag.

Selecting the right excavator isn’t a decision to be taken lightly. Research is required to find the machine that fits an operation’s needs. It’s a long process, but the end result is, hopefully, a machine that will safely increase productivity for years to come.

Selecting a trailer to transport an excavator is an equally important decision with just as many variables to consider.

Here are five tips to keep in mind when sizing a trailer for your excavator.

1. Equipment Weight and Dimensions

The first step in sizing a trailer for any hauling job is determining the weight and dimensions of the load. Determine the length, height, width and weight of the machine. Keep in mind that the information on the spec sheet might not include the dimensions and weight with added accessories.

When making initial calculations, ensure you have a suitable truck to handle hauling the excavator before moving on to the trailer. A three-axle tractor and a four-axle tractor will have different hauling capabilities.

Excavators have some special considerations. Certain machines have adjustable widths for Operation or Transportation mode. Figure out which mode will be used during transport as it may take time to make the necessary adjustments to convert between the two. For safety reasons, one half of the track width must be on the deck, excluding the outriggers. While the standard 8-ft. 6-in. trailer might work on paper in Transport mode, one must be honest in how trailers will actually be loaded from job to job.

The boom also requires special consideration. Operators need to consider which boom is required, as there are various available lengths; where the boom will sit on the trailer; and how it will be cradled. A low enough position of the boom is critical for keeping the load within height restrictions. Some top tier manufacturers offer customizations such as a rear bridge design that eliminates interference with boom placement and makes transportation safer and easier.

After determining the weight and dimensions, it’s time to look at trailer deck designs. Manufacturers usually offer three deck configurations — flat, raised center and beam. Determining which one will be the best fit is a question for the professionals, as there are pros and cons to each.

Custom trailer manufacturers have the experience and knowledge to determine what style would be best overall. While the primary focus might be on the excavator, a trailer often hauls a variety of equipment types. Backhaul equipment should also be included in calculations. An expert can determine the best trailer to meet all hauling needs.

Here’s a brief overview on deck designs to get started.

  • Flat — This is the standard deck design. It offers the most versatility for moving more than just excavators. However, it also has the highest deck height and might not be ideal for taller excavators.
  • Raised Center — This deck offers a lower deck height than a flat deck. Not all excavators will fit nicely over the raised center, however, and extra blocking might be required to make sure the equipment sits safely on the trailer. This reduces efficiency when loading and unloading.
  • Beam — Equipment straddles a central beam with this deck design, meaning it has the lowest ground clearance of the three. The main drawback is the lack of deck space for accessories or smaller components.

2. Trailer Capacity Rating

While knowing the overall weight of the excavator is imperative, it is also important to know where that weight is concentrated. An excavator might have a 10-ft. track, but all of the weight might be in the 8-ft. span between the front idler and the final drive.

Whether all of the weight is in 8 or 10 ft. shouldn’t be a problem for a 26-ft., 50-ton lowboy, right? Not exactly. The length of deck calculated in the capacity rating varies between manufacturers. One trailer might need the entire deck length for that 50 tons, while another handles that same weight in half the deck length. So, if the majority of the excavator’s weight is concentrated in 8 or 10 ft., a trailer with a half-deck load concentration rating offers the best solution. Failing to pay attention to how the capacity rating is calculated can lead to overloading the trailer, which can result in stress fractures and ultimately trailer failure.

3. Loading Configurations

Today’s trailers offer a variety of loading configurations. While tag-a-long trailers that unload off the back are an accepted option for small excavators in tight spaces, safety can be a concern. Driving an excavator over the back of the trailer is no easy feat and requires a careful and experienced driver to prevent damaging the trailer and minimize the risk of tipping the excavator.

Removable goosenecks reduce the safety risk by eliminating the need to drive up and over the trailer axles. This configuration saves time, hassle and expense while also extending trailer life. However, a removable gooseneck requires ample space for loading and unloading.

4. State and Federal Regulations

Knowing where a trailer is headed is as important as knowing what it’s hauling. In general, operators should not need additional permits for loads 102 in. wide or less and under 13 ft. 6 in. tall. However, weight and height regulations vary for bridges and between states, especially trailers hauling in California and the surrounding states. Operators must also consider state kingpin laws. Working with an experienced manufacturer will ensure a wealth of knowledge and expertise when it comes to making sure trailers and loads are safe and compliant for each area of operation.

5. Trailer Construction

It’s important to consider the quality of a trailer, not just the price tag. Working with a custom manufacturer offers the best results when it comes to safety, value and peace of mind. A trusted manufacturer will work to understand the client, not just the load. They will consider not just the excavator, but everything the client needs to haul, the territories of operation and the specific challenges they face. The manufacturer will use that information to design a trailer that offers maximum flexibility, versatility and strength.

Also consider the construction materials. Look for materials like heavy-duty T-1, 100,000-psi minimum yield steel for extreme durability and longevity. Apitong flooring is another good choice because it stands up better than traditional oak and pine decking. Investing in higher-quality materials and components can double the life of the trailer.

Trailers from a respectable manufacturer may also include positive camber in the design. The amount of camber can be customized based on the estimated usual load to ensure the flattest loaded deck possible.

Ensuring the right trailer is a job best left to the pros, but with these tips, operators can get a jump start on the process.

Troy Geisler is vice president of sales & marketing at trailer manufacturer Talbert Manufacturing.

Latest