Hi Steve,
It is the ratio of the section modii of each mast. The 3"OD x .25 wall
is 2.54 times stronger than a 2"OD x .25 wall tube of the same material. 154%
more.
73,
Dick, K5IU
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From: K7LXC@aol.com[SMTP:K7LXC@aol.com]
Sent: Wednesday, April 30, 1997 1:21 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Mast strengths
TowerTalkians --
My question for y'all (I'm from South Snohomish County) has to do with
the relative yield strength of a 3 inch mast versus a 2 inch mast. Let's
assume that they are the same material (4130 - 75,000 psi yield) and the same
wall thickness (0.250"). How much more load will the 3 inch take over the 2
inch at the same windspeed? I'm not looking for a paper on this, I just want
an idea of the relative approximate difference. Is it 20% more, 30% or what?
Thanks!
73, Steve K7LXC
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