Survey Computation 101

I disagree. Five minutes isn't enough time. Easy to do when you are at your desk looking at the plans. Harder when you are handed a sketch and the boss is checking his watch.

Is the easterly post drawn correctly? It doesn't look opposite to the other one.

Maybe this is my ignorance,but ...

A potential source of confusion is that one dimension is given to the "south face of glass" but the detail does not show the south face. Which way do the pieces of glass go together, short piece east/west of long piece or south of long piece?

Also, adding up the east dimensions

Half of 1-0 3/4  =  6.375"
+ 0-10 11/16     = 10.6875
+ 6-1 3/8        = 73.375
+ 3-10 1/2       = 46.5
-----------      ------------
 11- 4 15/16     =136.9375

does not match the 11-5" given. Where do you want your other 1/16" ?

Hey Bill

....how long did that take you? 😉

BTW, I get;

west post cl = sta 4+13.242
offset = 20.375

east post cl = sta 4+28.112
offset = 20.375

I'll take the criticism for the sketch, I drew it in one shot in ink in a few minutes. So my bad.

The 1/16" is on the architect.

Well I had to adjust because I had my station running from N to S with the offset being E and W.

I had an OS of 20.374 with stations of 413.241 and 427.128 (so I messed up somewhere on the Eastern post.)

Originally, Stations of 4+33.434 and an O/S LT of .181 and 14.068

All I know is that I wouldn't want Scott Zelenak to stand behind me with a stop watch while I did some construction layout checks, or John Hamilton standing behind me while I did some geodetic survey checks, or John Stahl timing me doing some case law research. And I especially wouldn't want Kent McMillan critiquing me on anything I do.:'(

I guess you may time me setting up a tripod, turning angles, or doing a solar observation. But that's it. 😀

If the guy is green, I would worry about him finding errors, and want to check his checks until I had confidence in him (or maybe even plant a couple of errors to check his ability.) If he is a seasoned surveyor who has worked in building world trade centers for years, and has saved my butt because he has found errors, I would probably want to break out the stopwatch on that guy.

It took me far too long, but I'm not in practice reading layout diagrams in mixed units.

So you held "Align" in the column detail and ignored the larger dimensions. Don't you have to get the architect to correct his 1/16? What if somebody else placed something off the near-center dimension of the escalator? You've used up much of your positioning tolerance due to that 1/16 going different places.

And it appears you calculated with the short glass east and west of the long glass, so the end of the long piece and the face of the short piece were at the same offset. The dimension line doesn't line up there, though.

Then you held the width between the N-S pieces of glass and ignored the dimensions down the middle. I'd guess the architect's 3'10 1/2 was where the 1/16 belonged.

Survey Computation 401

Imagine receiving this in the geometry package...

And then finding you have to do it for each of 118 individual and unique arches...
AND that's for just ONE piece of four which compose EACH arch!

I just did it in my head, but I got 4+13.25. Is that your 1/16th?:-S

Heck, I wouldn't even pull out a calculator until I had looked the sketch over for 5 minutes.

I would look for the obvious method for checking (which you probably used for calculations), then for an alternate method as a check using different dimensions.

I would probably also ask for a copy of the plans you used to generate your sketch.

You should be thankful that your associate spent what he felt was an appropriate amount of time.

Nothing worse than someone that only checks that 2+3=5 without verifying where 2&3 came from or that 5-3=2

I agree. The time to familiarize yourself with a set plans is critical to end up with correct results, otherwise it's just math and lines.

You may or may not be faster, but the truest test is to for both of you to pick up the plans for the first time at the same time when you start the clock.

Steve