13'5" clearance

Madhatter1 wrote:
since top height is the AC unit and cannot damage bridge structure if it touches.

A roof top A/C unit isn't going to damage a bridge. Instead, the bridge will do a very fast "air conditioner delete" mod for you, then you won't have to worry about height anymore.

Sjm9911 wrote:
I have never once sceen the RR guys go after the truck owners for damage to the bridge. And only once have sceen them inspect it. They dont bother with that stuff up here. It may be diffrent in other places.

I've seen it several times working for a state DOT.

The worst one included closure of the bridge and emergency work to replace it. The insurance company was hit up for several million and they didn't even bother to fight it.

The funniest was when a pickup pulling a boat decided to go around the bridge closed signs and he was found the next morning, with the truck hanging by the trailer from the bridge beams. They had only placed the flase decking so it fell between the beams and the trailer hung up. That one was only about $75k for inspection and repair of the damage.

I would creep slowly under a questionable overpass and If I touched it would only be the AC. Not going to fly under at 40 or 50MPH and hope for the best. Although it is funny to imagine. When I pick up the camper I will measure while on the truck. Will also hit the truck scales to get total weight.

Original question is what JoelC answered. But I will be careful and plan my routes. There is right now just one questionable bridge in Unionpoint GA that I can detour around. Other than that we are open highway. But do plan to go to some areas I will research first.

Thanks for the responses.

I have never once sceen the RR guys go after the truck owners for damage to the bridge. And only once have sceen them inspect it. They dont bother with that stuff up here. It may be diffrent in other places.

BurbMan wrote:

Madhatter1 wrote:
At least it's only a $1500 mistake.

Yes, $1500 for the a/c unit, not including the damage to the trailer as the a/c is ripped out of the roof and pushed backwards into the ceiling....

Yeah, as if it's going to neatly pop off with no other damage. I'd be shocked if you come in under $10k in damage if the air/con hits.

Yes, it is standard industry practice to update the signs based on field measurements and yes, there is a fudge factor.

Even if they omit the update, you won't find one that is significantly off for long. The first truck to get wedged under, someone will be out quickly to verify. While unlikely to cause serious damage with an RV, you can expect a bill for any damage and for an inspection to verify the bridge is unharmed. Typically, your insurance will cover it but if they decide you were grossly negligent by purposely going under a bridge posted lower than your height, they may at a minimum give you a hassle before paying.

Of course that fudge factor accounts for the fact that vehicles are built on suspensions that include springs. So a static measurement in your driveway can easily be off by 3-4 inches if you hit a bump and the trailer jumps up at the wrong time. That static measurement is really only good if you creep under the bridge at less than idle speed.

Madhatter1 wrote:
At least it's only a $1500 mistake.

Yes, $1500 for the a/c unit, not including the damage to the trailer as the a/c is ripped out of the roof and pushed backwards into the ceiling....

You should not have problems as long as you don't go under a bridge lower. My 5er is 13'6"

A suggestion on how to determine the actual height of your 5th wheel.

When you have the 5th wheel loaded as you will most likely use it go back to the dealer where you purchased the unit. Make sure tire pressures are at you towing pressures.

Pull into one of their stalls and stop with highest point under the doorway. Crawl up on top and measure the distance from the highest point of the 5th wheel to the door opening. Then measure from door opening to the ground. Do the math and you will know the exact height of the 5th wheel.

I did this before I took delivery of my 5th wheel to make sure it would go into my shop building. My dealer was more than willing to do this for me.

As others have said, know your exact measurements when hooked to your tow vehicle, and measure at every high point. My rig is 13’4” at the front AC, but 13’5” at the rear. I assume no “fudge” factor on marked overpasses. Remember that if roads have been resurfaced, the bridge marking may not have been remeasured. We have seen several where crews were out measuring again after roadwork had been performed. Generally, if I’m on a road and see 18 wheelers on that road, I figure I’m safe. To date we have never had to detour because of a low bridge.

You also have no idea how many times a municipality or a State Highway department has added more and more asphalt instead of digging the old out and putting in new. A 13'4" sign could really be something lower. I've seen that happen time and time again here in the Northeast and only after several years of adding more asphalt do they tear it out and pave the road again. I always assume whatever the sign says, it's a couple of inches less.