On 8 February 2011 07:52, William Wilson wrote: > ________________________________________ >>From: piclist-bounces@MIT.EDU [piclist-bounces@MIT.EDU] On Behalf Of cdb = [colin@btech-online.co.uk] >>Sent: Monday, February 07, 2011 5:28 AM >>To: PICLIST@MIT.EDU >>Subject: [OT] Windy Gusts and buildings question. > > 3. Opening the doors and windows does relieve the air pressure in the dwe= lling; however, > it also allows all of the debris to go flying through the dwelling and do= a lot of damage > and anything inside of dwelling can become a projectile. > The houses that I've seen implode due to tornados were doomed any way and= I don't think > that opening the doors and windows would have helped. I've also seen draf= ty barns with > plenty of air leaks have their roofs ripped off too. I've also seen torna= dos tear through > neighborhoods leaving some houses alone and destroying others. My persona= l feeling is that > if mother nature is out to get you then no amount of tape, boards, window= opening, or whatever > is going to save you. > -- IIRC Mythbusters did a scale test of this & found that while opening all doors and windows had an advantage in the ideal case, in most real world cases there is insufficient door and window area to make much difference. Not to mention the flying debris effect. RP --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .