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Dimensional Load Issue

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    September, 2013
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Dimensional Load Issue
Posted by caldreamer on Sunday, August 13, 2017 8:36 AM

I just installed a tunnel portal across a double track line.  When testing the portal for clearance I found out that it is too narrow to allow dimensional loads to clear one of the tracks.  Turns out that the side of the wide load will not clear the portal on track one.  I will have to restrict dimensional loads to run on track two only.  This will make for interesting operations  All other cars clear both tracks.  Has anyone else had a similar proble,?

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  • From: Canada, eh?
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Posted by doctorwayne on Sunday, August 13, 2017 10:49 AM

I deliberately built similar restrictions into my layout, although most are within particular industries, where there are width or height restrictions.  It adds operational interest. 
This necessitates idler cars (usually any flatcar or gondola that's handy) for areas with height restrictions.  
Some locomotives have width restrictions but most overly-wide equipment is things like plows, spreaders and cranes, and they're not allowed on some tracks - all covered in the rule book. Whistling
I did discover a restriction not planned, though, when I created these loads...

...and discovered that they were too high for my tunnel.  This necessitated that the cars have specific routing instructions, and they're also not to be turned, as they're directionally specific for loading and unloading.  The rack-equipped cars are in assigned service, basically just shuttling back and forth from one staging yard to another, as neither industry is modelled.

Wayne

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Posted by RR_Mel on Sunday, August 13, 2017 11:29 AM

I had a similar situation with a pair of vehicle tunnel portals for a wide road.  I used double track concrete tunnel portals (Pre-Size) and cut the center top with a razor saw and added a ¾” spacer made from Stryene strips.  It was relatively easy to finish the added “concrete” section so the patch can’t be seen.  
 
 
 
Mel
 
Modeling the early to mid 1950s SP in HO scale since 1951
 
My Model Railroad   
 
Bakersfield, California
 
I'm beginning to realize that aging is not for wimps.
 
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Posted by mvlandsw on Sunday, August 13, 2017 12:05 PM

   The B&O had that problem with some of the larger regular cars,not just with oversize loads.

Mark

  • Member since
    February, 2002
  • From: Reading, PA
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Posted by rrinker on Sunday, August 13, 2017 12:53 PM

 This sort of thing is partly why in modern times, formerly double track tunnels now have just one track right down the middle. That was mostly for vertical clearances with double stacks.

 I'm used to the auto frames stacked on flat cars, as that's the way they did it later on - we have tons of those on the club layout, as they were made right here, Parish Pressed Steel/Dana Corporation built auto and truck frames and train loads of them were a common sight around here in Reading for many years.

Funny that searching for them packed vertically in a gondola like that finds pretty much 2 images - a photo of a Santa Fe war emergency gone loaded up with them and that photo of Dr. Wayne's car.

                               --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

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    August, 2006
  • From: Saskatchewan
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Posted by last mountain & eastern hogger on Sunday, August 13, 2017 1:37 PM

Whistling

Wasn't planned this way, but the LM&E can't run double stacks on it's second main, but can on the first main and branchline.Height issue of a support inside a tunnel.                Guess how I found out?

Johnboy out.  ...................what was I thinkingBlindfold

from Saskatchewan, in the Great White North.. 

We have met the enemy,  and he is us............ (Pogo)

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Posted by doctorwayne on Monday, August 14, 2017 12:36 AM

rrinker
...I'm used to the auto frames stacked on flat cars, as that's the way they did it later on...

Yeah, that's what I see nowadays, too, but I do recall seeing the rack-equipped gondolas in this area in the '50s, as there were/are lots of auto plants in southern Ontario.
My layout is set in the late '30s, and I'm guessing that the gondola version is appropriate for that time.

Wayne

  • Member since
    February, 2002
  • From: Reading, PA
  • 23,095 posts
Posted by rrinker on Monday, August 14, 2017 1:04 AM

 Yes, stacked in gons would be far more appropriate for your era. The flat car ones we run are on 89 foot TTX flats - definitely not 1930's rolling stock! There's no fixed era on the club layout, there is everything from turn of the century to the latest SD70ACe's - particualrly the NS Heritage units. And even a fantasy scheme for a what if the Reading never went into Conrail and still existed. One member has a couple of fairly modern diesels with a blue and silver scheme. As more or less an exhibition layout, we run a wide variety to keep people interested. Only one tunnel, which exits right on to a river bridge (true to prototype), but it does clear double stacks on both tracks. Either someone was thinking, or they got lucky. AFAIK, the prototype tunnel was not modified in the past 50-60 years but is still in service.

                          --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

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