So you're in the market for a new trailer? A trailer has the ability to transport freight, animals, automobiles, medium-size houses--basically anything not securely fastened to the ground--thousands of miles when hitched to a diesel truck. Diesel Power described in the January '09 article "Towing Basics: A Beginner's Guide to Trucks and Trailers" how to tow. In this article we're going to discuss the different types of trailers so you'll know what to look for when buying, or making one. We'll also explain the various trailer designs to prepare you to potentially pull any trailer--anywhere.
What Kind of Trailer Do You Need?
1. Car or Boat Hauler: The first rule in selecting a trailer is buy one with the most versatility. Unfortunately we have to throw this out the window when it comes to hauling boats and cars, since they require trailers that are so purpose built.
2. JunkYard Parts Hauler: This type of trailer is the exact opposite of a single-purpose trailer. We would select an open flatbed with dual axles. A wood floor would keep greasy parts from sliding around. We would make sure it had a winch and a lifting hoist to assist in the loading of heavy parts and crippled vehicles.
3. Heavy Equipment: When it comes to towing heavy equipment, the closer the load is to the ground, the better. This setup is good because it is easier to load and you'll have a lower center of gravity going down the highway. The other thing you want is generous section height (distance up and down) in the trailer's framerails to reduce flexing under heavy loads. Check out HeavyEquipmentForums.com. It has a ton of information, cool pictures, and knowledgeable members.
4. Enclosed Trailer: This type of trailer has many benefits, including complete protection from the elements, security from the masses, and less resistance from the wind. The downside is they take more planning to load and unload. Plus, they tend to be less durable compared to a simple flatbed trailer.
Choosing the Right Trailer Material
WOOD: Won't rust and is easily replaced if it breaks or rots away.
STEEL: Steel trailers are durable and strong.
ALUMINUM: Aluminum trailers are very lightweight and will not rust.
FIBERGLASS: This is what many enclosed trailers are built with.
 A breakaway switch is a link...  A breakaway switch is a link between the trailer and tow vehicle. If the tow vehicle ever separates from the trailer, the connection breaks, which sends a signal to the trailer brakes to lock up. |  This is a textbook example...  This is a textbook example of how not to wire something. There are no grommets protecting the wire from the jagged steel (arrow). As the trailer vibrates down the road, eventually the protective coating will get rubbed off, and the wire will short out. |  This is an example of how...  This is an example of how your wiring should look. Notice the grommet protecting the wires as it passes through the support (arrow). A better setup would include wire-protecting conduit covering the whole thing. |