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Since the LC/DBM October issue focuses on equipment that landscapers use to perform their tasks on a day-to-day basis, we also decided to examine one of the main modes used to transport that equipment. There are many different types of trailers, but the most common used by landscapers are dump and utility trailers. When it comes to landscape utility trailers there are enclosed, open and flatbed. Choosing Your Trailer Type Enclosed trailers are a safe way to transport shovels, rakes and pruning shears, and often come equipped with cabinets, bins, equipment racks and storage boxes. Their open space in the center can be used for mowers, leaf blowers and such. Although enclosed trailers tend to be heavier and less aerodynamic than an open landscape trailer, they do provide a lockable storage unit and protection from the outside elements. Open landscape utility trailers are similar to flatbed trailers with the addition of back or side ramps. These trailers are often used by the landscaping industry because they are medium to heavy duty, cost efficient and verses an enclosed trailer they are less expensive to purchase. Flatbed utility trailers have decks that sit low to the ground; they can haul heavy loads and are easier to handle on the road because of where the deck sits. Most flatbed utility trailers will have ramps on the sides or back for easier loading and unloading. The Other Landscape Trailer Dump trailers have the option of dumping from the end, bottom or side. To choose the best dump trailer it is important to know the weight of the material being hauled, as well as the site location and consistency of material. Dump trailers are often watertight. End dumps typically have higher sides and carry more cubic yardage, however this does not mean they can carry more weight. Side dumps have better stability, stronger construction and often operate at a reduced cost because of liability issues. Bottom dump trailers generally haul loose materials, such as dirt or rock, and the product is unloaded from a gate at the bottom of the trailer. By unloading at the bottom of the trailer, the driver is able to spread the load out over a large area. The low dumping point also makes the trailer safe, and rarely tips over, which can be an issue with end dumps. Here are specifics to consider when shopping for trailers.
Axels Whether you have chosen a flatbed, enclosed or open landscape trailer, the number of axels on it is an important factor. When making this decision you must consider how much weight your trailer will haul. A general rule of thumb states that anything over 3,000 pounds should be carried on a tandem axle trailer. Also, if you plan on hauling more than 3,000 pounds, trailer brakes need to be considered. Brakes Trailers come with and without brakes, however, they are recommended for dual axle trailers and may be required depending on where you live. As there are many types of trailers there are also several types of trailer braking systems. Types of braking systems include electric, hydraulic surge and surge. Electric braking systems are the most common type of braking systems found on trailers. This type of braking system connects the brake system on the tow vehicle to the brake system on the trailer. This is accomplished by installing a brake controller inside the tow vehicle. The controller senses the braking force of the tow vehicle and in turn activates the brakes on the trailer. A hydraulic surge brake system consists of an actuating cylinder that is usually integrated with the trailer tongue assembly. As the tow vehicle applies its brakes, the "surge" of the trailer towards the decelerating tow vehicle compresses the surge actuator. As this cylinder is compressed, force is applied to the master cylinder and from there to the braking cylinders.
Surge braking systems are more expensive and usually only needed if you'll be using several different tow vehicles that would each require a brake controller. Electric brakes are usually preferred over surge brakes because their operation is independent from the tow vehicle. If for some reason the tow vehicle loses its brakes, there would not be enough deceleration surge to activate the surge brakes. However, with electric brakes, the driver could manually activate the brake controller thus allowing the trailer to slow. In some states, any trailer with brakes is required to have a breakaway system. In the event that the trailer becomes disconnected from the tow vehicle, the trailer brakes would apply automatically to stop the run away trailer. Trailers equipped with electric brakes carry a separate battery to activate the breakaway system. Surge brakes use a cable that locks the breaks in a breakaway situation. Tongue The tongue length is a critical component for the stability of the trailer; generally the longer the tongue the easier it makes for towing. Shorter tongues require up to 15 percent of the trailer weight to be on the ball. Longer tongues only need around 10 percent. That means less weight on your vehicle and more on the trailer. Load Capacity or GTW When purchasing your trailer, special attention should be paid to the gross trailer weight, GTW, as this determines how much your trailer should haul. This number also includes the weight of your trailer. It is also recommended that when you load your trailer, you do so from front to back, distributing the weight evenly from side to side. Also, for the stability of the trailer you should not load more than 50 percent of your weight at the front of the trailer.
Raleigh, North Carolina
Francisco Uviña, University of New Mexico
Hardscape Oasis in Litchfield Park
Ash Nochian, Ph.D. Landscape Architect
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