Q&A for How to Build Trailers

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Question

What type of metal bars and thickness are ideal for making a trailer?

Community Answer

You would need structural steel: c-channel, angle iron, square and rectangular tubing. Thickness: 1/8" to 3/16" is typical. The exact thickness and size of the metal depends on how sturdy it needs to be for its intended weight capacity.

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Question

Why would I use two axles for a light duty trailer? Why would every trailer have to be 100 inches? What if I want sides and a tail gate?

Community Answer

100 inches is about the maximum width you can legally build your trailer, but it can be narrower. One advantage of two axles is that it's safer if you pop a tire. Also, two axles can help to distribute the weight to a bigger area.

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Question

At what ratio should I place the axles on a trailer?

Community Answer

The axle should be set at 1/2 inch from the center for each foot of the trailer backwards.

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Question

Is there a law requiring brakes on the trailer?

Community Answer

No, but if you're hauling a large or heavy trailer it is recommended. Without trailer brakes your vehicle brakes handle all of the load and can cause the trailer to jackknife (swing out) in an emergency braking situation.

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Question

What type of welding should I use to make a trailer, and what is it called?

Community Answer

It depends on the steel you would welding. The easiest method is with a mig (GMAW). The setting will depend on what you're welding between voltage and wire speed. The welding bead has a different method as well between a simple flat bead to a vertical up bead (challenging).

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