Search String: Display: Description: Sort:

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+comparing\s+top\s+section\s+of\s+crankup\s+to\s+unsupported\s*$/: 4 ]

Total 4 documents matching your query.

1. Re: [TowerTalk] comparing top section of crankup to unsupported (score: 1)
Author: "Steve, W3AHL" <w3ahl@att.net>
Date: Sat, 20 Mar 2010 13:45:41 -0400
I'll just respond to the pipe grade portion for now: ASTM A53 Type E Grade B may have a TENSILE strength of 50-60k, but not a YIELD strength -- that would be 35K typically. Big difference. The issue
/archives//html/Towertalk/2010-03/msg00411.html (9,653 bytes)

2. Re: [TowerTalk] comparing top section of crankup to unsupported (score: 1)
Author: "Steve, W3AHL" <w3ahl@att.net>
Date: Sat, 20 Mar 2010 20:24:51 -0400
Kevin, Based upon your assumptions and rough estimates, you are correct that the top section in your example would be operating near its max stress limit with the rated load at the top of the tower a
/archives//html/Towertalk/2010-03/msg00433.html (11,784 bytes)

3. Re: [TowerTalk] comparing top section of crankup to unsupported (score: 1)
Author: Kevin Normoyle <knormoyle@surfnetusa.com>
Date: Sat, 20 Mar 2010 19:02:58 -0700
Steve: Also: I've never seen anyone describe how to migrate a manufacturers' spec on windload at 1' above the tower, to something distributed across a 10' mast, given moment limits for each section.
/archives//html/Towertalk/2010-03/msg00437.html (11,855 bytes)

4. Re: [TowerTalk] comparing top section of crankup to unsupported (score: 1)
Author: Dan <n5ar@air-pipe.com>
Date: Sat, 20 Mar 2010 19:23:05 -0700
When I lived in Dallas some 15 years ago I was given a damaged TX472 tower by a friend who was moving to another state. It was folded over in the 2nd section from the top. I believe it had supported
/archives//html/Towertalk/2010-03/msg00439.html (14,716 bytes)

Current List: 1 - 4
Page: [1]
This search system is powered by Namazu