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RE: patented steel tower bracing connections[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "'seaoc '" <seaoc(--nospam--at)seaoc.org>
- Subject: RE: patented steel tower bracing connections
- From: "Sprague, Harold O." <SpragueHO(--nospam--at)bv.com>
- Date: Tue, 28 Oct 1997 16:13:00 -0600
Dave, This is probably a Rohn tower if it under 300' and on the West Coast, but if it is 1000' it could likely be a Stainless tower. Rohn focuses more on microwave towers while Stainless focuses on broadcast towers. They both use the pinched round tubes as bracing elements. You may wish to call: Norm Kouba or Duane Haug at Tower Technology, Inc. 816-358-0003 Kansas City, Missouri They are telecommunication tower structural specialists. Good luck, Harold Sprague Black & Veatch ---------- From: Dave Evans To: seaoc(--nospam--at)seaoc.org Subject: patented steel tower bracing connections Date: Thursday, October 23, 1997 9:33PM We recently inspected a self-supporting radio tower suffering from extensive corrosion damage. The diagonal braces were three to four inch diameter steel pipes, galvanized and painted. The pipe ends appeared to be (hot or cold) formed into cones about four inches long, pinched down to a diameter of 3/4 inch or so, with an ID of 3/8". Tear-drop shaped tabs were welded to each side of the cone, for a very compact single-bolt, double-shear connection to the leg knife plates. Apparently, the lower ends eventually plugged (insect debris?) , allowing water to accumulate, leading to severe corrosion and, in some cases, large holes in the braces. Interestingly, some of the holes are at the top end of the braces. I'm guessing that this end connection may be a patented design. Does anyone have any information about who the manufacturer/supplier may have been? Thanks, Dave Evans, P.E. TNH, Inc.
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