Tower Verticality Test Equipment

How about a plumb line?

Plumb is not suitable for this test.As the it will not stable for wind pressur.Our tower heights mostly 30 Meter to 40 meters. Request you to suggest some other mean.

Samar.

Kolkata.

WB.

Suggest you look around for something like a Permaplumb®^[1]. It's basically a laser plumb-line.

[1] Nothing to do with KrisDel™, you'll be pleased to hear .

spirit level at the top with a wireless video link.

attach with a magnet a attach a cord to pull it down when installed.

put four small arms sticking out from top with reflective surface and measure with laser measure.

place laser at base and send beam up middle of structure to align with centre of top.

if laser at base is is level when beam at top is in the middle of mast youve done it.

probly best done at night

Any good ?

Thanks a lot, But I could not follow you. If possible can you send some publication,drawing e.ct so that I can understand you in better way. One of our erected tower's photo attached for your ready reference. looking forward for your reply.

Yes, as you say in your next post, plumb line is impossible as it is never stable with the wind.

You may do one simple thing:

Have a good L plate. Using good inclinometer (now a days good digital inclinometers with very good resolution are available). Make a vertical face of the L plate exactly vertical.

Now, use this face as guide face for a laser light device. (Green laser will be better, where you can even see the beam of the laser.) ..... I mean touch the total lengths of the laser device to the vertical face of the L plate. If the length of the laser device is not straight, make some holder of laser device, whose one face will be perfectly flat. Touch this face to vertical face of the laser.

Now rotate the laser device/holder with laser device, assuring perfect contact of vertical face of the L plate and the flat face of the laser holder. The laser beam will move exactly vertical. Align the L plate with verticality maintained so that the laser spot will be on the edge / or wherever you want of the tower. You will get good information of verticality of the tower.

Thanks,One request, if you are having catalog/publication (with photo) digital inclinometer,please send the same to me.For your ready reference I am attaching one tower photo on which we have to do verticality test.

Here is just few examples:

http://encardio.com/ean25m_inclino_vertical.pdf

http://www.leveldevelopments.com/electronic-inclinometers.htm

In fact, you may stretch a metal string from center of the top of the tower and the center of the base of the tower & chech verticality of the stretched string using some inclinometer. (This is also called tilt anglemeter.

You may google more for the ready made product.

Dear, _{(by the way, this is a really demeaning salutation)}

Why don't you just use a spirit level?

This model is equipped with a rotation compensator so that you can rotate it 90° and check the plumbness of the tower.

No pesky wind deflection problems like you have with the "KrisDel^TM plumbline certification".

My fee for solving your problem is just $39.95USD. Please send a PayPal remittance to my PM account with in 5 business days.

Thanks,

LL Consulting

Your one stop center for plumb good solutions!

MEIC, BMOC, PDQ, ESQ, and BMF, Inc.

www.ll.con.com

My experience is that while erecting steel towers, one has to measure face slope and heel slope for verticality, conviniently done by a spirit level gauge which has an adjustable length steel bolt attached at one end.

The length of the steel bolt of this particular spirit level can be adjusted in consideration of the designed slope of face or heel of the angle iron of tower such that the spirit level is perfectly vertical with bottom and bolt of the gauge touching the properly aligned angle iron member.

Practically placing the spirit level with properly adjusted bolt lengths, from the footing upwords, precise measurement of deviations can be charted.

You may cnsider using a steel wire connected from tower top to each footing and using the above described device.

For this type of isssues we can use Rope for Tower verticality test& RTT towers we can use this method (or) By using Digital Theodlite We can check the tower verticality

We measure transmission tower verticality using a laser scanner. I presume the same principals can apply to comms towers as well. This would be much more expensive than the theodolite work, but you can also detect twist at any level, the vertical distortion (verticality) at any level, deformed steel parts and much more.

You can scan from short range (even inside the tower) as well as longer ranges (up to about 200 m).

For older towers with no engineering drawings the laser scan data can be used to derive drawings (reverse engineering).

Please review http://www.laserscanning.co.uk/ power lines

From Peter Merrett

CR4 Admin - email removed

From the Site FAQ: Do not post phone numbers or email addresses. The CR4 Admin will delete all phone numbers posted in threads or comments, and we strongly urge you not to put up email addresses.

Dear, I used to do that, You will need an ''diagonal eyepiece'' for your theodolite or total station.It is a small piece you can add to your theodolite to be able to see at the zenith it can allow you to be next to the tower.If you have more questions don't hesitate