They should crisscross each other beneath the ball hitch, thus forming a cradle in case the ball and tongue should separate. The idea here is to keep the towing vehicle and the trailer as one unit. Never go anywhere without those chains attached.
Your hitch should have slots designated for the chains.
The chains connect to a loop on either side of the ball hitch. One on each side. The chains should not be so tight that when the vehicle turns the chain gets tight and restricts the turn before the trailer starts to turn. The chain is more for safety should the trailer get of the ball.
Your hitch should have slots designated for the chains.
There are many safety precautions you should take with used dump trailers. Make sure you get a warranty, and insurance for your safety.
If the trailer hitch should come uncoupled, the safety chains keep the trailer connected to the towing vehicle. When attached PROPERLY, they will also prevent the tongue of the trailer from digging into the road surface if it should disconnect. Cross the chains left to right, and right to left UNDER the tongue of the trailer.
Make sure spare tire is secured, if it has one. Make sure safety chains are secured to trailers and make sure converter doily air tank drain valve is closed
crisscrossed under the trailer couple
Car chains are designed to aid the motion of the car during ice and snow. Therefore, they should be attached to the drive wheels of the vehicle. In other words, front wheel drive cars need the chains attached to the front wheels.
An appropriate hitch and safety chains should be used
Tractor trailers can be quite dangerous if they don't include safety features. The most important ones are emergency stop features, meaning features that completely stop the machine at different situations, such as the machine overheating or the driver falling off.
Big Tex Trailers and Trailers for Less offer good information about flatbed trailers. You should be able to get a good knowledge base from these websites.
You should find out about the cost and durability of the livestock trailers before making a purchase.