Construction Surveying - High Rise Building

Does anyone here have any actual experience in transfering vertical columns as the building goes up? Can you give me an idea as to the accuracy required when you layout column positions floor to floor?
I am using the "hole in the floor" technique looking down on the previous floors to a point on the ground. Problem is when I need to layout a point that is not physically visible from the main column point.
Ben

Ben,

How many stories are you talking?

I would try to contact Scott Z, or Tim V. They really seem to have the experience that can give you the correct answer.

I have done one high rise, but it was only 13 stories, and we put the control up from the ground, shooting through the open walls before the building was closed up. I worked for what we did, but I am told that method would not work for buildings that are much higher than that.

Good luck, I'll be watching this thread.

Jimmy

Jimmy

Total number of floors is 25. I am thinking of submitting a quote but I have only done previous type of survey for a 10 storey building using the hole in the floor method. I read in a recent GIM article that as the building goes up other factors must be taken into consideration like wind shear forces. The article was using active GNSS receivers to serve as control points. This is way out of my ability or budget.

My take is tall buildings has been around long before GNSS receivers so what method are they using?

Benc, in case you are a recent  reader, Jimmy was refering  to SCOTT ZELENAK  Try searching his name for some old posts as he is WTC guru !

Has written plenty on gear and methods, I suspect his pics may be lost.

I am not into high rise surveying, but got the privilidge to ride up outside lift  during construction of the Petronas Twin Towers Kuala Lumpa to near top tower floor  before it tapered in as an OZ surveyor was in charge of set out.


RADU

Leave 3 holes in the floor, with plumbers cans upside down, forming a right angle. Use a laser plumb bob and a transparent sheet on the floors above. "Jump" the laser every 5 or 6 floors. This has worked beautifully for me, in one building every deck in each unit came to a point , they lined up deadly. This is the poor mans way, Mikes procedure is much better if you have the equipment.

If you are going to lay-out steel, you should (read as must) read tha American Institute of Steel Construction manual.
The AISC is equivalent to ALTA or FAA minimum standards.  If you don't know it and understand it, you probably shouldn't be bidding steel.
It spells out the tolerances you must meet.

Remeber; your average fee will be less than one quarter of one percent of the cost of high rise construction.
Imagine the damages you could incur.

We always used targets set on the major range and axis of the building and "buck in on both the range and axis lines" . As the building goes up occasionally the targets need to be re- established . I have gone up 20 stories with this method and never had a problem. The buildings we were controlling were concrete.  Our instrument was a WILD T-2 and sever rep's are necessary to insure accuracy.

Go old school, use large plumb bobs suspended in buckets of oil. Use a downrigger, you can just power it up and let out line as you go up! LOL..........

there is software now that allows you to seamlessly carry control on an infinite number of floors in high rises

i have the same problem in construction i am an engineer but i am working as a survey engineer then i have to setting out every floors using TS then i have a problem " hwo to maintain the verticality of my building" which has 45 floors hwo to check verticlity of this building we have already finish 26 floors i want to check the verticality of my building what is the accurate methord to check verticality of this building lpease help me Professionals.

That question should be asked at an initial meeting with the architect, structural engineer, and contractor.