Total Station for Heavy Industry Engineering

leica

Ask [USER=442]@Mike Falk[/USER]

How do you define "Heavy Industry Engineering surveying"?

If price is no object, the Leica TM30/50/60 is designed just for heavy monitoring. It is used in a lot of mining, tunneling applications. Good luck

Mike Falk, post: 335593, member: 442 wrote: How do you define "Heavy Industry Engineering surveying"?

We want to build a high bay warehouse - Tolerances are 5mm/50m on hight (vertical deflection) and 10mm/100m lenghtwise.

So i guess itå«s gotta be a highly accurate 1" angle instrument with optical plummet, mini prism, mechanical brakes and 90å¡ eyepiece.

Do you in USA have any Books about surveying a Industry Buildings?

llepu, post: 336235, member: 10131 wrote: Tolerances are 5mm/50m on hight (vertical deflection) and 10mm/100m lenghtwise.

If I'm sufficiently awake to run my calculator, that's 20 arc seconds, so a 3 or even 5 second instrument should be adequate to keep angle errors under control. With 2 direct/2 reverse measurements of course.

This is easily achievable with a 3 second instrument but you have to note a couple of points.

1. Your controls have to be nicely surrounded and not easily damaged. Have seen surveyors use one short baseline to extend a traverse which caused a swing in the building when he set out.

2. Before setting out, it will be good to measure to at least 2 Back Sights, to prevent said swings.

3. Always try to do a weekly check on your centering of your instruments.

4. I use a sliding prism(Not sure what is the proper term for it) as I can easily adjust the height with many things blocking on sight.

5. Are you going to set out for steel works or concrete? Cause it is slight different to set out each of them.

Cheers

Any Leica or Trimble Engineering and Monitoring 1" gun should handle this. Many 3" and 5" have EDMs that would push this limit.

I also question the need to measure Direct and Reverse angles with a modern total station using angular encoders versus a glass circle used in older theodolites. This topic has been previously discussed.
https://surveyorconnect.com/threads/total-station-accuracy-question.275378/

Many seem to only look at the error of their total station and do not consider complete error propagation in measurement including centering and targeting errors.

Norris Service Inc, post: 335962, member: 10457 wrote: If price is no object, the Leica TM30/50/60 is designed just for heavy monitoring. It is used in a lot of mining, tunneling applications. Good luck

Price is always a object, i can spend max 15 000 ‰â for new Total Station 🙂

Leica TM30.... 35 000 ‰â in Europe

llepu, post: 339223, member: 10131 wrote: Price is always a object, i can spend max 15 000 ‰â for new Total Station 🙂

Leica TM30.... 35 000 ‰â in Europe

Should be able to get a 1100 or maybe 1200 series Leica for that money.
TM30 is basically a 1200 without powersearch but with extra facilties related to monitoring. å£11000 reconditioned from the dealer here (we just bought one).
You will need a diagonal eyepiece if you plan to use a theodolite for plumbing up 50m columns.

Nikon 821 would also fit the bill cheaply. My 1st instrument, been sitting idle for years now. I think I have the eyepiece as well. I no longer work on highrise.

I am not sure how one would achieve 5mm accuracy on a 50m high column/building. It will move more than that in the wind, especially part way through construction. This may be an unachievable tolerance where someone has just thought of a number!

squowse, post: 339325, member: 7109 wrote: Should be able to get a 1100 or maybe 1200 series Leica for that money.
TM30 is basically a 1200 without powersearch but with extra facilties related to monitoring. å£11000 reconditioned from the dealer here (we just bought one).
You will need a diagonal eyepiece if you plan to use a theodolite for plumbing up 50m columns.

Nikon 821 would also fit the bill cheaply. My 1st instrument, been sitting idle for years now. I think I have the eyepiece as well. I no longer work on highrise.

I am not sure how one would achieve 5mm accuracy on a 50m high column/building. It will move more than that in the wind, especially part way through construction. This may be an unachievable tolerance where someone has just thought of a number!

Yeah, i know. Wind and temperature difference are big factor for surveying a steel structures. Did you used any of mathematical formulas for calculating the effects of temperature on steel structures?

p.s.
Can you send me a Web site or e-mail from your Leica dealer on PM?

llepu, post: 339421, member: 10131 wrote: Yeah, i know. Wind and temperature difference are big factor for surveying a steel structures. Did you used any of mathematical formulas for calculating the effects of temperature on steel structures?

p.s.
Can you send me a Web site or e-mail from your Leica dealer on PM?

SCCS in UK.
There are a lot of the TM30s being off-hired from being used monitoring Cross-Rail (big project in London).

Coefficent of expansion is 0.000012 per degree C for steel!

So far i have offer for :

1.) Leica FlexLine TS09 plus 3"
2.) Topcon DS-101AC 1"
3.) Nikon Nivo M+ 2m 2"

I also question the need to measure Direct and Reverse angles with a modern total station using angular encoders versus a glass circle used in older theodolites.

Repeating those angles makes for a decent error trap when you need to rely on measurements.
There have been a few threads where some software versions won't operate well on certain platforms.