simple ties. Unless there is some shear resistance mechanism between the
brace points, the unbraced length for lateral buckling is not reduced and
the ladder simply behaves like 2 tied beams (e.g. Iy1 + Iy2) and they just
displace in unison.
Regards
Paul
--
Paul Ransom, P.Eng.
ph 905 639-9628
fax 905 639-3866
ad026@hwcn.org
> From: "Conrad Harrison" <sch.tectonic@bigpond.com>
> Have you considered providing short bridging members between the two beams:
> to create a kind of ladder, or otherwise similar to battened column. The
> displacement of one beam then becomes tied to the displacement of the other
> and the effective length for lateral buckling is reduced. Could still use
> plywood top and bottom for the bridging/bracing it just doesn't have to be
> continuous box section: unless have an aesthetic reason.
******* ****** ******* ******** ******* ******* ******* ***
* Read list FAQ at: http://www.seaint.org/list_FAQ.asp
*
* This email was sent to you via Structural Engineers
* Association of Southern California (SEAOSC) server. To
* subscribe (no fee) or UnSubscribe, please go to:
*
* http://www.seaint.org/sealist1.asp
*
* Questions to seaint-ad@seaint.org. Remember, any email you
* send to the list is public domain and may be re-posted
* without your permission. Make sure you visit our web
* site at: http://www.seaint.org
******* ****** ****** ****** ******* ****** ****** ********