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 > Theoretical heights.

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Allworth

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Posted: 05/14/22 04:06pm Link  |  Quote  |  Print  |  Notify Moderator

The Traffic Engineering Department agrees with Yahalla!!


Formerly posting as "littleblackdog"
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jaycocamprs

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Posted: 05/14/22 05:36pm Link  |  Quote  |  Print  |  Notify Moderator

MatthewThomas wrote:


Unnecessary, but this is theoretical, I don't have a unit, but am planning a build and want to know if my theoretical numbers make sense.


If you thinking of building a trailer, you need to look at this thread. BoonHauler BoonHauler was a member here but hasn't posted in years. From what I remember reading the build thread he really did it right. Took a good while but really looked good when he was done.


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msmith1.wa

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Posted: 05/14/22 09:51pm Link  |  Quote  |  Print  |  Notify Moderator

Some reading material regarding vertical clearance and max vehicle height.

FHWA vertical clearance


RVIA

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MatthewThomas

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Posted: 05/15/22 01:37am Link  |  Quote  |  Print  |  Notify Moderator

way2roll wrote:

Thanks for the clarity. Keep us posted on your build. Never seen anyone build up a FW. Pretty interesting project.

I still think there is a ton of value in measuring real world units. Lots of engineers over decades have refined the design of current FW's.


Definitely will. The next time I go into town I plan on taking a measuring tape with me.

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Posted: 05/15/22 01:42am Link  |  Quote  |  Print  |  Notify Moderator

jaycocamprs wrote:

MatthewThomas wrote:


Unnecessary, but this is theoretical, I don't have a unit, but am planning a build and want to know if my theoretical numbers make sense.


If you thinking of building a trailer, you need to look at this thread. BoonHauler BoonHauler was a member here but hasn't posted in years. From what I remember reading the build thread he really did it right. Took a good while but really looked good when he was done.


Hey thanks for the material I'll definitely be giving it a look.

MatthewThomas

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Posted: 05/15/22 01:54am Link  |  Quote  |  Print  |  Notify Moderator

msmith1.wa wrote:

Some reading material regarding vertical clearance and max vehicle height.

FHWA vertical clearance


RVIA

Heavyhaul.net





Interesting literature. Even tells about permits and such if necessary. I really appreciate it!

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Posted: 05/15/22 08:04am Link  |  Quote  |  Print  |  Notify Moderator

Well, let's confuse the matter a bit more for the math challenged...

13.5 feet = 13 feet-6 inches = 4.1148 meters = 411.48 centimeters.

In either case, over this height does require an over height permit for travel. There are also legal limits, for width, length and weight before you will be required to have a travel permit and sometimes an escort service.

Enjoy the day folks.

Ken


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msmith1.wa

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Posted: 05/15/22 11:29am Link  |  Quote  |  Print  |  Notify Moderator

TXiceman wrote:

Well, let's confuse the matter a bit more for the math challenged...

13.5 feet = 13 feet-6 inches = 4.1148 meters = 411.48 centimeters.

In either case, over this height does require an over height permit for travel. There are also legal limits, for width, length and weight before you will be required to have a travel permit and sometimes an escort service.

Enjoy the day folks.

Ken


The threshold for needing an oversize load permit depends on the state you are in. Only looking at the height allowed. There are quite a few that allow 14ft and a couple that allow more, without a permit. Looks like Alaska allows 15ft.

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Posted: 05/15/22 03:10pm Link  |  Quote  |  Print  |  Notify Moderator

I designed large packaged systems that we had to design with the transport means in mind and where it was headed. The shipping department handled all the logistics with the truckers. Before a loaded truck left the shop, we had the driver up top with a tape measure and to also check maximum with and overall length. We noted these dimensions on the way-bill so that he was fully aware of his load size.

One time we had an oversize load hit a bridge (it was over height, width, length and weight). It was winter, so we had to watch the axle load limits on certain roads coming from Toronto to the Texas Gulf Coast. The driver decided to get off his designated route and visit a girlfriend and found a bridge he would not fit under. It cost his insurance and trucking company about $350,000 for repairs on the equipment in 1977. The trucking company said he would never drive again in North America.

So, measure your rig yourself and watch the low clearances.

Ken

* This post was edited 05/15/22 05:14pm by an administrator/moderator *

valhalla360

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Posted: 05/16/22 06:48am Link  |  Quote  |  Print  |  Notify Moderator

TXiceman wrote:

One time we had an oversize load hit a bridge (it was over height, width, length and weight). It was winter, so we had to watch the axle load limits on certain roads coming from Toronto to the Texas Gulf Coast. The driver decided to get off his designated route and visit a girlfriend and found a bridge he would not fit under. It cost his insurance and trucking company about $350,000 for repairs on the equipment in 1977. The trucking company said he would never drive again in North America.


On the positive side, when an RV meets a bridge beam, it's just a matter of sweeping up the RV pieces and maybe a little paint to touch up the steel beams.

Now a big excavator with the arm up too high...that insurance company got to buy a new bridge as he was well into the 3rd beam before the arm ripped off. Even worse, it was put an expedited schedule because the freeway was being shut down. I was only involved in the traffic control for the response but I'm sure it was several million before it was all done.

Stay within 13.5 (13ft 6inch, etc...) and it's generally not a big issue. The rare bridges that are below that are typically heavily signed.


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