"A" distance

[guest]

I was wondering as I drove by several of these objects today if there was a way of telling how tall they where by thier paint markings. I noticed that they were sectioned off into red and white paint areas. I have heard about being able to tell how tall they are by the amount of lights used on them. Is there a standard to tell how tall they are by the way they are painted. Just curious.

-e

[guest]

If you go to 321cya.com Jason has a chart that explains the height in relation to lights. I had a hard time using the chart. Im sure if you e-mail him though he would explain it.
bsbd

[bps]

Hello -

Both the red/white painted sections and the lights on most towers vary from tower-to-tower and sometimes even within the tower itself.

For example, the tower I jumped last night has 7 lights. The highest we ever go is light #5 due to the transmitter on top. One would think that each light is evenly spaced, but check out the different altitudes:

Light 1: 150ft
Light 2: 306ft
Light 3: 426ft
Light 4: 527ft
Light 5: 717ft

Not very evenly spaced...

With that being said, I've heard the FAA has certain requirements that lights fall under, but the "window" of altitude for each light is so great that it is not much use if you want to measure it accurately. (i.e. 1st light 100-200ft 2nd light 250-400ft etc)

I think BASE 428's website has some info on this at www.321cya.com

And if all else fails, I recommend the following tried and true method: climb on up, huck yourself off, and when things get really big, wait another second and then pitch.

:-)

Have fun...

Bryan

[imported_mknutson]

The very best way of finding out the height for any object, is to get a range finder and jsut sit at the bottom and shoot!
It is accurate within +-3'.

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Thank You

Mick Knutson :D
[link:www.blincmagazine.com|BLiNC Magazine]

"Everything you ever wanted to know about BASE Jumping, but didn't know who to ask."
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[base311]

The best method (for our purposes) is a laser rangefinder as already mentioned. Second best method (IMHO) is to count rungs of known length and don't lose track - it beats singing "I've been workin' on the railroad".

If you're interested in the regulations controlling airspace obstruction lighting and marking schemes for towers, etc., they may be found in 47CFR Part 17, et seq.

Link to 47 CFR 17 Index:

http://www.access.gpo.gov/nara/cfr/w...7cfr17_00.html

Also, the FAA publishes an Advisory Circular (AC 70/7460-1K) which discusses more clearly the marking guidelines and lighting systems/schemes for the various types of structures. You can get AC 70/7460-1K in *.pdf format in whole (zip file) or in part here:

http://www.faa.gov/ats/ata/ai/index.cfm

Have fun :)

bsbd,
Gardner

[guest]

Towers that use white strobes for daytime do not have to be painted in any particular scheme. Towers that do not use strobes follow the FAA guidelines. Please see:
www.flashtechnology.com

and
http://www.faa.gov/ats/ata/ai/index.cfm

All towers from 150-700' should have seven color bands (Orange,White,O,W,O,W,O).

For each additional 200' above 700', add two bands (one orange one white), so a 2000' tower will have 20 bands.

[guest]

speaking of antenna lighting, there is a website that a drawing demonstrating lights and their placement to indicate height. im trying to get the one that shows white flashing strobes and how high an object is by how many strobes. anyone know that website or this answer?