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 I was also going to take a look at that option and, depending on the difference of the wind pressures, use one or the other.   Doug Mayer, SE Structural Engineer   From: Drew Morris [mailto:dmorris(--nospam--at)bbfm.com] Sent: Wednesday, August 26, 2009 10:55 AM To: seaint(--nospam--at)seaint.org Subject: Re: Wind Load Question   Couldn't you also look at the canopy as a partially enclosed building, 3 sides open with 1 side solid? Doug Mayer wrote: `Conrad,`` ``Thanks for the input.  Your recommendation is basically where I was``heading, so I feel better about that approach now.`` ``Doug Mayer, SE``Structural Engineer`` `` ``-----Original Message-----``From: Conrad Harrison [mailto:sch.tectonic(--nospam--at)bigpond.com] ``Sent: Monday, August 24, 2009 5:14 PM``To: seaint(--nospam--at)seaint.org``Subject: RE: Wind Load Question`` `` ``Doug,`` ``Not sure about ASCE7-05, but AS1170.2 has coefficients for attached``canopies. I recollect the commentary to ASCE7-05 indicating canopy/free``roof``pressure coefficients were derived from AS1170.2 and new research.`` ``If no attached canopy coefficients in ASCE7-05, then the coefficients``are``similar order of magnitude to those for free roof blocked under.`` ``Alternatively can derive by combination of roof pressure coefficient for``enclosed building and adjacent wall pressure coefficient. For example``overhang coefficient is approximately windward wall coefficient +0.7``combined with windward edge roof coefficient -0.9, both acting upwards``gives``-1.6 (upwards away from roof surface). (sorry +0.8 to ASCE7)`` `` `` ``Regards``Conrad Harrison``B.Tech (mfg & mech), MIIE, gradTIEAust``mailto:sch.tectonic(--nospam--at)bigpond.com``Adelaide``South Australia`` `` `` `` `` ``******* ****** ******* ******** ******* ******* ******* ***``*   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(--nospam--at)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 ``******* ****** ****** ****** ******* ****** ****** ******** `` ``No virus found in this incoming message.``Checked by AVG - www.avg.com ``Version: 8.5.409 / Virus Database: 270.13.66/2325 - Release Date:``08/25/09 06:08:00`` ``******* ****** ******* ******** ******* ******* ******* ***``*   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(--nospam--at)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 ``******* ****** ****** ****** ******* ****** ****** ******** `` ``  ` No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.66/2325 - Release Date: 08/26/09 12:16:00