Thalasso
Commander
- Joined
- Jan 18, 2011
- Messages
- 2,879
Re: Trailer to Truck Safety Chains
First of all ,crossed chains is the law. There must be a reason for it.2nd of all you shouldn't be running 75 mph down the highway with a trailer. Most trailer tires are speed rated at 65 mph.As you stated the chains are doing what they are meant to do if crossed. Trying to keep the trailer in a straight track.
I used to pull double 45ft trailers across the NY Turnpike. The second trailer had chains. Wonder why
What happens on a dynamic moving load is not the same as what you think might happen at rest. To the naked eye, it makes perfect sense that crossing your chains creates a nice little basket for your tongue to gently rest in, and everything is good. What happens in real life is that crossed chains can in fact be more dangerous! Let me explains...
So if you are going down the road at 75 and the hitch pops off. The drag of the trailer will cause it to slow down almost instantly. The tongue does not drop down, but goes backwards. Given the right conditions, it will be nearly horizontal to where it left the ball. Now think of what the cross chains are going to do, the coupler is going to find a way to escape the basket relatively quickly. So now you are thinking, ok, no harm no foul, its still connected at least. Well, if the chains are crossed, the trailer is going to start oscillating. Basically the tongue will go a little to one side, but the opposite side chain is going to overcorrect it to that side. Now repeat that process about twice a second.
Anyway, the SOLE purpose for safety chains is to keep the trailer attached to the vehicle one way or another should the coupler pop off. If you are accomplishing that primary goal, it really doesn't matter
First of all ,crossed chains is the law. There must be a reason for it.2nd of all you shouldn't be running 75 mph down the highway with a trailer. Most trailer tires are speed rated at 65 mph.As you stated the chains are doing what they are meant to do if crossed. Trying to keep the trailer in a straight track.
I used to pull double 45ft trailers across the NY Turnpike. The second trailer had chains. Wonder why