good to have more confidence in a design approach.
why not head it off? i suppose i was trying to save concrete ...
never brought it up...
still not too late ... but i think there is also an architectural
feat involved. .
2007/4/18, Jake Watson <jake.watson1@gmail.com>:
> I'm sure it can be done, but I haven't done it. The torsion translates into
> simple bolt shear at the wall. Each bolt will have shear in a different
> direction. The AISC manual has a similar treatment for bolts in a
> shear-tab. All that said, why not simply header off the span? Run a beam
> from wall wall 2 to wall 3. And then one from wall 1 to the previous beam.
> You can then cantilever over the second beam (see below).
>
> __________________________<wall 1
> > | | |
> > | _______|_____________|
> > | | | ^cantilever |
> > | | | < wall 1 to beam1
> > |____ |_______|____________ |
> > | ^beam 1 (wall 2 to 3) |
> > ^wall 2 ^wall 3
>
> You didn't give dimensions, this may not be practical.
>
> Good luck,
>
> Jake Watson, S.E.
> Salt Lake City, UT
>
>
>
> On 4/15/07, refugio rochin <fugeeo@gmail.com> wrote:
> > I have a scenario that I am losing sleep over.
> > So, I think I would like some opinions from the "been there done that"
> peoples.
> >
> > Between two perpendicular wall segments, sketch below
> >
> > __________________________<wall 1
> > | | |
> > | _______| |
> > | | ^ |
> > | | < cranked beam |
> > |____ | |
> > | |
> > ^wall 2 ^wall 3
> >
> > there is a cranked beam (torsion beam). Between the cranked beam and
> > wall 3 is a floor, suspended by the cranked beam and the wall. In
> > between the cranked beam and wall 2 is a stair. which lands at the
> > portion of the cranked beam terminating into wall1. total length of
> > wall 1 is about 28 feet. the stair lands about midway.
> >
> > the floor uses office live loading 50 psf, and is a joist and deck floor.
> >
> > Now, wall 2 ends just past the beam and also has a beam landing on it
> > supporting one wall of load and a roof and one floor length. of the
> > same joist and deck floor. It is a 12" solid grouted block wall below
> > into an 8" block wall above. The wall 1 is an 8" block wall solid
> > grouted below, into an 8" block wall above.
> >
> > Now, I can design a beam internally to the walls which takes the
> > cranked beam ends and the torsion loads. However, my main concern is
> > what the blockwalls can take. I can provide the beam loads tomorrow
> > morning. My calculations show it can be done, but perhaps I am
> > missing some elements of surprise... I am happy to share my calcs
> > with an engineer that would be so happy to gander and give me their
> > thoughts.
> >
> > cranked beam size: 10"x 24" with 4 #5 bars top and bott, and 4
> > intermediate #5 bars spaced in pairs... wall 1 beam is 8"x 48"beam w/
> > 14 #5 bars and #3@3"o.c. stirrups. wall 2 beam is a conjoined beam
> > 12"x 26" beam + 8"x 16" beam. The 12x 26 beam has 4 #5 bars top and
> > bott and 4 intermediate #5 bars and the 8x16 portion has 8 #5 bars
> > which round it out. there are two sets of #3@3"o.c . stirrups which
> > are overlapped about 8 inches.
> >
> > Best Regards,
> > Refugio Rochin
> >
> > ******* ****** ******* ******** ******* ******* ******* ***
> > * 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
> > ******* ****** ****** ****** ******* ****** ****** ********
> >
>
>
******* ****** ******* ******** ******* ******* ******* ***
* 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
******* ****** ****** ****** ******* ****** ****** ********