Steam & Excursion > ORHC - Turntable project - next

These 1/13 pictures show the support for the turntable pivot.  The Omega Morgan project foreman was quite proud to point out the hard to see nail at the center showing where the pivot will be centered.   Expect to see next week some progress toward installing the parameter rail...maybe even the pivot being placed.    Thanks to all for watching our progress here in Portland, Oregon.  Arlen

---

---

Hey how come you didn't go corner to corner to find the center?  You wouldn't have to depend on the tape and a mistake.
Just joking.
Blaine
American Fork

Oh by the way I forgot to tell you how much I've enjoyed your series on this construction project.  Looking forward to seeing more.  Very interesting.
Blaine
American Fork

The surveyors nail is not necessarily at the enter of block, but for sure it is at the center of the pit and the peripheral rail loop.
ST2K

Here is the type of instrument the contractor would likely use to lay out the 3-axis locations of perimeter rail and center pivot:

https://en.wikipedia.org/wiki/Total_station

Simply amazing watching this project unfold.

 

Todd Clark
Canyon Country, CA
Trainorders.com

Yes the nail is probably the parameter for the perimiter rail.

Out 

Parameter for the perimeter?.
It rhymes..

But, how about the 'center' for the rim rail?

W.

I'm imagining the Omega Morgan crew chanting a well-centered Ommmmmm as the turntable joins the center pivot.

I put myself through college working as a surveyor for an engineering firm in PDX in the late '50s and early '60s and think it should be possible to locate the exact center point in the middle and then measure all the way around using the correct radius.  This should put the rail in between the short bolts already installed.  However Omega Morgan does it I'm sure that their people are far more qualified than I am.  

Let me add my thanks for posting this series of photos.  Very interesting and as a layman, the contractor appears to be doing a great job.

GFP
Baltimore, MD

Jsporseen Wrote:
-------------------------------------------------------
> I put myself through college working as a surveyor
> for an engineering firm in PDX in the late '50s
> and early '60s and think it should be possible to
> locate the exact center point in the middle and
> then measure all the way around using the correct
> radius.  This should put the rail in between the
> short bolts already installed.  However Omega
> Morgan does it I'm sure that their people are far
> more qualified than I am.  

Surveying is one of those professions that sometimes I think.....what I had done that? Walter Mitty at heart...lots of things I coulda done..but grateful I found the railroad.