Hit a 13'6 ¹/² bridge.

There is a diference of a few inches between 11/ 22 s and 11/ 24 s. I am paranoid about bridges, I make use of the dump valve a lot.

 

It's your fault. Even as a new driver I know you ride lower when loaded than empty. They teach you that day one. Plus your trailer should state it's height. If you barely cleared it going in. You won't going out.

 

On a properly functioning air ride suspension, why would the weight of the load change your height? If you add weight and the arm on the valve moves up, it adds air until you're back at the proper height.

 

Have you heard of leaf springs? They bend.

 

We're talking about air ride suspensions, not spring ride.

 

What is the company policy on truck routing through NYC?
If the sign says 12' 2" - then there is a problem.

 

Yes. See that nice leaf spring attached to the air bag? You do Pre-Trip right?

 

In the case of a trailer, we are also not just discussing a suspension. If you are talking about a tiny fraction of clearance most likely once unloaded the difference in the tires will be enough. It is a MAJOR mistake to assume a Truck height will remain the same, loaded as opposed to empty.

I'm not discussing the OPs situation with my reply.