RE: 125' long steel truss, connection question[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: 125' long steel truss, connection question
- From: Paul Meyer <PMeyer(--nospam--at)HASimons.com>
- Date: Wed, 23 Jun 1999 17:37:26 -0700
You would be being conservative if you assumed all connections were pinned. Using a K factor of 0.9 is reasonable for each panel of the top chords.
Similarly, you could use a K factor of 0.75 for the web pieces instead of 1.0 to take advantage of the end fixity.
The REALLY important thing is to ensure that the detailing results in the centres of all of the pipes intersecting properly to avoid induced moments in the chords.
I highly recommend a text to you. "Hollow Structural Section Connections and Trusses" 2nd ed.. by Jeff Packer and J.E. Henderson, published 1997 by the Canadian Institute of Steel Construction. ISBN 0-88811-086-3 http://www.cisc-icca.ca. There is information on calculating the fixity of all members, even for cases with different top and bottom chord sizes, etc. References are made to Canadian, USA and international codes.
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