Mark Johnson wrote:
Drew, This probably isn't a simple problem. Is this a SCBF? If so, strengthening the brace will mean recalculating many of the other members (columns, beams and braces). The same may be true of other lateral force resisting systems. MJ --- On Mon, 8/10/09, Glenn Otto <ggator1256@cox.net> wrote:From: Glenn Otto <ggator1256@cox.net> Subject: RE: A53 pipe substitution for HSS pipe brace To: seaint@seaint.org Date: Monday, August 10, 2009, 7:11 PM Drew, I don't know what members are doing what and what the symmetry problem is, but is it possible in your case to calculate what stresses the eccentricity(?) introduce to the members and sum those with the intended ones? A Structural Engineer, P.C. Glenn C. Otto, P.E. Virginia Beach, VA -----Original Message----- From: Drew Morris [mailto:dmorris@bbfm.com] Sent: Monday, August 10, 2009 9:47 PM To: SEAINT Subject: A53 pipe substitution for HSS pipe brace I have a case where a HSS5.00x0.250 round brace was cut 12" too short. The contractor/fabricator cannot apparently find another piece that is easily available. The piece is only about 14 feet long and is part of a 2-story X braced bay. They have asked whether they can use a piece of 5" STD A53 pipe instead. For the HSS, RyFyAg = 205.2 k. For the A53, RyFyAg = 292.3k. I can increase the throat of weld of the brace to the gusset plate, but I'll end up with a non-symmetrical brace configuration. Any comments or suggestions?******* ****** ******* ******** ******* ******* ******* *** * 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 ******* ****** ****** ****** ******* ****** ****** ********