I have the Rohn Chart that shows RH-25 can self support 1.5 sq.ft of windload at 70 MPH with no ice. For 90 MPH is self supports 1.7 sq. ft 30 feet of height (no ICE). The specs are for 3 - 5/8 feedl
Hmm...that's interesting, thanks for the file. Given that Steve has maintained that 25G isn't self-supporting at any height literally dozens of times on this reflector, I wonder if that document from
Rohn's data regarding the self-supporting capabilities of 25G (RH-25) is based on well-established structural engineering calculations with a significant safety factor thrown in. I wouldn't be surpri
I downloaded the Rohn chart, dwg # A871266, date 9/24/87 and agree with Dan. The chart even shows that a 40 ft self support height will withstand 1.5 sq.ft. wind load, no ice at 70 mph! Amazing! Dave
Given that Steve has maintained that 25G isn't self-supporting at any height literally dozens of times on this reflector, I wonder if that document from 1987 has been superceded. Umm, really? Doesn't
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Fri, 12 May 2006 23:56:53 -0400
My 1990 catalog states "Guyed ROHN towers are not self supporting at any height". OTOH it seems like I have an older catalog that gives information for self supporting installations. Unfortunately I
I believe the older catalog did not show guy wires or specific guying at all until 40 feet. While you could order, buy and install a 30 foot tower, there were not any engineered solutions for guy wir
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Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Sat, 13 May 2006 12:48:24 -0400
I don't think that's quite what they meant<:-)) Roger Halstead (K8RI and ARRL 40 year Life Member) N833R - World's oldest Debonair CD-2 www.rogerhalstead.com ________________________________________
I think what they meant is if you construct it as a guyed tower it is not self supporting at any height. That is what it says. A bracketed tower is neither guyed nor free standing so the comment does
Un-guyed 25 .. I have yet to see one fall over with nothing on it! 1.5 sq ft is next to nothing, on 2ØM .. HIHIHI I've been .. on a7Ø' stick of 25 un-guyed .. `course, I only went up ab
My catalog (from 2000, I think), clearly states "As a guyed structure, [Rohn] 25G can rise to a maximum height of 190 feet. Selfsupporting and bracketed heights depend on loading are also specified i