Steam & Excursion > ORHC Turntable Update - A little additional concrete work

Pictures aren't as good as the two in Arlens update on the Western board BUT I am wondering why a fork lift has brought in a pallet of sacks of cement and they are doing some additional concrete work.  Couldn't get close enough to tell but maybe somebody knows and could enlighten me/us.

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Cement to anchor bolts or other hardware?

Victor Baird



Edited 1 time(s). Last edit at 03/02/23 15:43 by wabash2800.

I'm sure you know a lot more about this type of work than I do so you are probably right.

I've been told that when you see those passenger cars in the backgroud moved around to another part of the yard that is the signal that the TT installation is about to happen.  The little, historic, UP switcher #96 is going to get a lot of work at that time I suspect rearranging rolling stock.

Will they set the trucks into place in the pit first, or attach them to the bridge and set the whole assembly into place?

This is something that I do not understand but I was told in a face-to-face discussion by a person whose name is well known on the TT posts that he was told they are going to put in the bridge in place first and then put in the trucks afterwards.  I don't understand that but have to defer to Omega Morgan, Doyle and others who know far more than I do. The control cabin and electrical go in after that I assume.

I would guess the concrete work may actually be grouting around the conduit they ran for the power and such, and the timbers are for cribbing under the bridge when they swing it into the pit before the trucks are installed and the final "set" takes place.

Cheers, Dave

That.

Victor Baird

Hillcrest Wrote:
-------------------------------------------------------
> I would guess the concrete work may actually be
> grouting around the conduit they ran for the power
> and such, and the timbers are for cribbing under
> the bridge when they swing it into the pit before
> the trucks are installed and the final "set" takes
> place.
>
> Cheers, Dave

The cement masons always have finishing work to do after the forms are stripped and the concrete has cured.
Little things like filling air bubble holes and stuff like that.

PHall Wrote:
-------------------------------------------------------
> The cement masons always have finishing work to do
> after the forms are stripped and the concrete has
> cured.
> Little things like filling air bubble holes and
> stuff like that.
Sounds reasonable to me

Posted from iPhone

There will be no "swinging" involved. 
Doyle told me they will slide the bridge onto the cribbing and then lower it into the pit by removing the cribbing, the same way the Phoenicians used to build their turntables.
SR

BoilingMan Wrote:
-------------------------------------------------------
> There will be no "swinging" involved. 
> Doyle told me they will slide the bridge onto the
> cribbing and then lower it into the pit by
> removing the cribbing, the same way the
> Phoenicians used to build their turntables.
> SR

Now that's awesome...

Cheers, Dave

It was the Romans that widely used concrete construction, 
not the Phoenicians.  Phoenicians, way earlier, woulda' had stone TT pits.

Across the south of France are several Roman, very high aqueducts, 
still standing* and still carrying crucial water supplies across their wide valleys.
No leaks.
AWSOME..

​W.

(*The stone blocks, set in concrete).



Edited 1 time(s). Last edit at 03/03/23 05:54 by wcamp1472.

The Romans- of course.
Duh.
What was I thinking?!
SR

BoilingMan Wrote:
-------------------------------------------------------
> The Romans- of course.
> Duh.
> What was I thinking?!
> SR

"Romani ite domum!"

Cheers, Brian of Nazareth

Hillcrest Wrote:
-------------------------------------------------------
> BoilingMan Wrote:
> --------------------------------------------------
> -----
> > The Romans- of course.
> > Duh.
> > What was I thinking?!
> > SR
>
> "Romani ite domum!"
>
> Cheers, Brian of Nazareth


Whoa! You were an Altar Boy too?!
(E Pluribus Domum?)

SR

Here is how they installed a new turntable bridge in 1944.  I think this was at the Union Pacific Abina roundhouse, but am not sure.  (I’m not from Portland.). The photos are mislabeled Southern Pacific:

https://digitalcollections.ohs.org/turntable-setting-at-southern-pacific-portland

The original turntable bridge and pit wall are already gone, and the expanded pit has been bridged by temporary rail and cribbing.  The new bridge has been rolled out onto this support on what looks like freight car trucks, one at each end.  Two wrecker cranes are positioned on opposite sides of the pit, poised to lift the bridge and lower it into the pit.  The last photo shows the new bridge hanging from the cranes, with the temporary rail, cribbing and trucks removed.  Workers are finishing the job of clearing the pit (some under the suspended load) so the bridge can be lowered into position on the center bearing and the new perimeter rail.  The crane that is trapped between the pit and the roundhouse can escape across the turntable after it is in place.

How the old bridge was removed isn’t shown, but I suspect it would have been the reverse of the setting process, whereby the cranes would have picked up the bridge, workers would have cleared away at least some of the old pit wall, built the cribbing and temporary rail, then the bridge would have been lowered onto the trucks on the temporary rail and rolled way.

Correction:  The turntable described above is not at the Union Pacific Abina roundhouse, but at the SP&S Hoyt Street roundhouse, in an area subsequently redeveloped beyond recognition.
Additional note:  The Hoyt Street roundhouse (by then Burlington Northern) is where the 4449 was overhauled and prepared for her AFT service.  I'm sure the old-timers around ORHC know this well, but it was news to me and perhaps to some other more recent TO folks as well.



Edited 3 time(s). Last edit at 03/06/23 14:15 by Elesco.

also not about portland....1944 is way later than when we think the current (not at ORHC) turntable was installed at brooklyn....GREAT pictures   Arlen

asheldrake Wrote:
-------------------------------------------------------
> also not about portland....1944 is way later than
> when we think the current (not at ORHC) turntable
> was installed at brooklyn....GREAT pictures 
>  Arlen

Arien,
Here are photos of the Brooklyn installation of our turntable in 1925:

https://wx4.org/to/foam/sp/locations/Brooklyn/turntable.html

Edit:  Now somebody please explain how they got the old turntable out from under the new one as shown in the last photo.

 



Edited 1 time(s). Last edit at 03/03/23 21:26 by Elesco.

Elesco Wrote:
-------------------------------------------------------
> asheldrake Wrote:
> --------------------------------------------------
> -----
> > also not about portland....1944 is way later
> than                                                                                                                                       Interesting, thanks.
> > when we think the current (not at ORHC)
> turntable
> > was installed at brooklyn....GREAT pictures 
> >  Arlen
>
> Arien,
> Here are photos of the Brooklyn installation of
> our turntable in 1925:
>
> https://wx4.org/to/foam/sp/locations/Brooklyn/turn
> table.html
>
> Edit:  Now somebody please explain how they got
> the old turntable out from under the new one as
> shown in the last photo.
>
>