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Old 03-25-2018, 06:44 AM   #21
JandC
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Originally Posted by jeffba View Post
This thread has got me looking into things. There is not a National Height Limit. The federal Government leaves it up the the states. If you look you will find for the most part states have set the maximum height to either 14' or 13'6". Folks use the 13'6", the lesser of the 2, as the maximum because is is simpler to remember. I you live in a state that has a 14' limit you are legal at 13'9. If you only visit states with a 14' maximum you are legal. but in all states there are structures that are less than their maximum stated vehicle height, and we must make sure we do not test their limits.
Actually the Feds do set a height limit, but it only applies to commercial traffic and not RVs. However, I certainly want to be as "short" as possible when traveling throughout the states. If you don't think there are that many low overpasses under 13'6" just pick up a Trucker's Atlas and start checking each state. You will be surprised at how many are out there.
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Old 03-25-2018, 06:58 AM   #22
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Originally Posted by JandC View Post
Actually the Feds do set a height limit, but it only applies to commercial traffic and not RVs. However, I certainly want to be as "short" as possible when traveling throughout the states. If you don't think there are that many low overpasses under 13'6" just pick up a Trucker's Atlas and start checking each state. You will be surprised at how many are out there.
I have one and that was the source of my information.

Page A15 of the 2018 Rand McNally Deluxe Motor Carries' Road Atlas states there is not national standard but the lowest height enforced at the state level is 13'5. Page A14 size limits for interstate routes.
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Old 03-25-2018, 10:01 AM   #23
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Mount Zion-Carmel tunnel is 13'1"
and a $15 permit fee.
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Old 03-25-2018, 10:46 AM   #24
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That is all well and good if you are talking about a Class A or C. There are just too many variables involving the TV (tow vehicle) for the factory to provide an accurate height on a fiver. Heck, you could change the size of your TV's tires and raise or lower the fiver height an inch in some cases.
True. Raising the suspension on the rv won't change the height but taller tires on the tow vehicle or an hitch that is higher than normal could cause some problem. I've seen trucks with lift kits hauling rv's and they are asking for trouble.
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Old 03-25-2018, 12:45 PM   #25
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Mount Zion-Carmel tunnel is 13'1"
and a $15 permit fee.
atlas and website have it at 11'4" and $15.00 fee. Maybe they have repaved it

https://www.nps.gov/zion/frequently-...and-tunnel.htm

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Old 03-25-2018, 01:05 PM   #26
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11'4" is the height where a permit is required.
13'1" is the maximum height for transit.
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Old 03-25-2018, 08:02 PM   #27
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you could change the size of your TV's tires and raise or lower the fiver height an inch in some cases.
Yeah, but then the 5th wheel would not be level. I think we all agree that each one of us should measure their unit they way they are set up. Otherwise you will never really know.
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Old 03-26-2018, 06:49 AM   #28
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Originally Posted by jeffba View Post
I have one and that was the source of my information.

Page A15 of the 2018 Rand McNally Deluxe Motor Carries' Road Atlas states there is not national standard but the lowest height enforced at the state level is 13'5. Page A14 size limits for interstate routes.
The Feds do not have a commercial regulation for height like they do for weight for example, you are correct. However, even though they have allowed each state to set their own limit it was not without their approval and blessing. But like I stated, all that does not apply to RVs anyway.
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Old 03-26-2018, 11:21 AM   #29
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But like I stated, all that does not apply to RVs anyway.
Correct, the only thing that applies to RV's are the concrete overpasses.
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Old 03-26-2018, 11:29 AM   #30
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True. Raising the suspension on the rv won't change the height but taller tires on the tow vehicle or an hitch that is higher than normal could cause some problem. I've seen trucks with lift kits hauling rv's and they are asking for trouble.
What? If you raise your suspension, the RV is then sits taller, if you lower the RV suspension, then the RV sits lower, as for changing tires, with RV tires, you won't gain much if any more clearance.
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Old 03-26-2018, 11:49 AM   #31
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What? If you raise your suspension, the RV is then sits taller, if you lower the RV suspension, then the RV sits lower, as for changing tires, with RV tires, you won't gain much if any more clearance.
The highest point of your Montana is the front a/c. Yes if you raise the suspension then the rear of your rv will be higher but have no effect on the front.This would be like jacking up your truck at the rear, the rear will raise but the front won't.
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