[TowerTalk] Plumbing a tower

[RICHARD SOLOMON]

But I expect that like most digital instruments it is +/- 1 digit at the last digit, so a
reading of 00.2 degree could actually be from 00.1 to 00.3 and still be in tolerance.
 
And I thought the Timenuts group was A/R.
 
73, Dick, W1KSZ 



> From: BobK8IA at aol.com> Date: Tue, 22 Jan 2008 17:03:20 -0500> To: xdavid at cis-broadband.com; towertalk at contesting.com> Subject: Re: [TowerTalk] Plumbing a tower> > > In a message dated 1/22/2008 2:53:29 P.M. US Mountain Standard Time, > xdavid at cis-broadband.com writes:> > Three inches out of 100 feet also requires an accuracy of 0.3 inches for > a plumb bob string hung from a 10 foot section of tower.> > Three inches out of 100 feet calculates out to be a total angle of 0.14 > degrees. By that criteria, the 0.1 degree resolution of the digital > angle gauge I used doesn't seem like that much overkill. I guess I'm > just one of the particular ones ...> > http://i228.photobucket.com/albums/ee141/xazdave/HD-70_Tower_Leg_Angle_89r1Deg> rees.jpg> > 73,> Dave AB7E> > > > > > Dave;> > Steve was quoting EIA/TIA-222 as it pertains to guyed towers (deviation from > true vertical no more than 1 part in 400 or 3" in 100'). For self supporting > towers, like yours, the spec calls for max deviation to be no more than 1 > part in 250, or roughly 4.8"in 100 ft, i.e. 3.36" for your 70 foot AN Wireless > tower. ;-) > > 73, Bob K8IA> > > > > **************Start the year off right. Easy ways to stay in shape. > http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489> _______________________________________________> > > > _______________________________________________> TowerTalk mailing list> TowerTalk at contesting.com> http://lists.contesting.com/mailman/listinfo/towertalk