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Under The Awning Here is where you can carry on a conversation, just like............well, like you were sitting under your awning at the campsite.

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Old 04-09-2013
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Trawlercap Trawlercap is offline
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Default Mega load

See if this will copy and paste.

The photos are not in order, sorry. I can email it in order if anyone wants it.Click image for larger version

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For the past few weeks, a "super heavy" load has been making its way from Hardeeville, SC to BIGGAR, SASK It is a large electric generator destined for a clean coal power plant.

The generator weighs in at 1.98 million pounds and isn't something you just jump on an interstate freeway with and truck it on down the road.

In order to support such a load without destroying every inch of road you travel, the weight has to be widely distributed. You also have to travel back roads so that day to day commerce isn't completely disrupted along your route. After all..... your top speed on level ground is less than 20 mph and this drops to as little as 1.5 mph on grades and slopes. Rush hour traffic on an interstate would soon be solidly backed up to the state lines in both directions.

I finally had time to catch up with the load on Friday as it moved along a stretch of country road near the NC state line, but was unable to get near enough to shoot photos. Luckily, one of the crew let me know it would be on the move again early Sunday morning when they would be making a detour around an interstate overpass that was not rated for anything near the weight of the load.

Here is the rig I'm talking about.... The trailer, as rigged, is 300 ft. long all by itself. There are 36 rows of axles, each with 8 tires. (288 total) These can be augmented with up to another additional 80 wheels on hinged outriggers, for a total of 368 potential flats. Add in 5 each 10 wheel heavy duty road tractors (2 pulling and 3 pushing) and that flat tire potential rises to 418. The outriggers are not deployed in these photos, so the

total tire count, for the moment, is 338.




The load then had to negotiate the 90 turn seen in the photo. This had to be done while keeping all 338 tires solidly on paved surfaces. Note that each axle is steerable so it's only a little less exacting than a tap dancing centipede, but an on board computer system has things well in hand. It doesn't fully control the action since there is a "driver" in the chain of command. Here the action as begun and the lead tractors are making their

initial turn.




As things advance, dozens of power crews are on hand to clear overhead wires and there are hundreds of other support crews and dozens of support trucks waiting to fall in line behind the convoy.



Notice that each large truck has a box firmly anchored over the rear wheels. Those are 18,500 pound weights which give the truck the needed traction this load requires to get it moving.



Looking closely at the rear section of the trailer, you'll see it is sitting at about an angle of 45 to the rest of the load. Once the main load was aligned as they wanted, the rear section crabbed and adjusted until it was in line and ready to travel. It was a strange action to watch but it worked perfectly.







Here is a shot of one of the two "Drivers" The computer might tell the all wheels how much to turn, but this guy tells the computer when to do it and how much at a time. He's apparently pretty durable since the dawn temperature was a chilling 25 as he began his ride.



Here you can see how the immense weight was distributed across the trailer sections as well as the hinge points for the support bridge. Both ends are supported in this fashion, making the whole rig a lot more flexible than it might first appear. Those outriggers I mentioned are clearly visible along the outer edge of the trailer.



The main bridge beams suspend the huge generator about 18 inches above the roadbed. When the job is completed, the round pins near the bottom edge can be removed and the beams can be stacked for their return trip home. Even up close they almost look too small to be holding that much weight up in the air. Standing near this beam is a little spooky. All kinds of pops and groans can be heard, even when it isn't on the move.



It was a fun way to begin a new day. Everyone I met was friendly, including those doing some downright cold and dirty work. Even the local cops seemed to be in fine spirits as they dealt with more traffic than that small community has probably ever seen. I just wanted to share some of the sights with you guys.
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Old 04-09-2013
Stephen Stephen is offline
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Iam wondering why they do not ship it as a single track dimensional load
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Old 04-09-2013
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Impressive & thanks,

FlagMan Finn can still get a job
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Old 04-09-2013
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Looks like one of Mammoet's rigs....FYI I work with this industry every day in Tx (Oversize/Superheavy load movement).

Stephen, not sure exactly what you mean by single track? The carriage configuration is used to get the height down, the large number of tires is to reduce pavement pressure and the long length configuration is to pass bridge tolerance calculations. Pavement doesn't care about weight, just about psi, bridges are pretty much the exact opposite so a lot of these multi-tired and long configurations are to make the pavement engineers and bridge engineers happy at the same time. We've had some loads that had to reconfigure every time they crossed a bridge or more often build jumper bridges (wooden beam bridges on top of the main bridge where all the weight was localized to the vertical supports only). Really cool stuff and really smart people working in this highly specialized industry
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Old 04-09-2013
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Its better than going to the circus,cool stuff.
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  #6  
Old 04-09-2013
Stephen Stephen is offline
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Quote:
Originally Posted by dmurdock View Post
Looks like one of Mammoet's rigs....FYI I work with this industry every day in Tx (Oversize/Superheavy load movement).

Stephen, not sure exactly what you mean by single track? The carriage configuration is used to get the height down, the large number of tires is to reduce pavement pressure and the long length configuration is to pass bridge tolerance calculations. Pavement doesn't care about weight, just about psi, bridges are pretty much the exact opposite so a lot of these multi-tired and long configurations are to make the pavement engineers and bridge engineers happy at the same time. We've had some loads that had to reconfigure every time they crossed a bridge or more often build jumper bridges (wooden beam bridges on top of the main bridge where all the weight was localized to the vertical supports only). Really cool stuff and really smart people working in this highly specialized industry
A single track load is where there are adjoining or adjacent tracks all traffic is stopped diverted if it is over a certain width it encroaches on the adjacent tracks not a good situation
All you have to do is call the big load dept. and tell them where it is and where is is going and they will provide end to end routing, special handling, dedicated train
it may have to do with rail service at both ends but if it is a coal Generator
you can bet the end of the line is in the plant
Also price has a lot to do with it Nasty trucks always want to under cut the price
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Old 04-09-2013
Bearmtnmartin Bearmtnmartin is offline
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Heavy as a Wanderlodge.
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Old 04-09-2013
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A 950,000 pound autoclave was hauled on highway 80 in Nevada out to a mine I worked at. Unfortunately, it was done a few years before I worked there. I have heard that the Nevada DOT said never again after the several week ordeal.

Here is a link to a picture.

It is copyrighted so I didn't want to just lift and post it here.
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Old 04-10-2013
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Quote:
Originally Posted by Bill Pape View Post
Impressive & thanks,

FlagMan Finn can still get a job

Not interested any more over 30 years was enough.
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Old 04-10-2013
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Cool, thanks for the photo essay! As they say in Biggar - New York is big, but this is a Biggar. If you decide to follow it it will be passing not very far away! Hopefully, at the rate it is traveling the snow will be gone when it gets up here!
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