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Re: Shielding[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: Re: Shielding
- From: "Fountain Conner" <fconner(--nospam--at)gulf.net>
- Date: Wed, 9 Sep 1998 21:46:38 -0500
Don't forget the quartering wind. Any sailors out there? Your maximum speed (wind force) is not with a following wind (perpendicular to the sail), but with a wind which gives pressure to the windward and suction on the leeward. I think your client may be leading you down a slippery slope. The wind can blow from any direction, and you can't turn your building complex so that the wind only blows in a structurally favorable direction. Ever wonder why many large sailing vessels are multi-masted? If the sails "shielded" one-another, you'd only have pressure on the aft sail and suction on the forward one (rear and front or flat end and pointed end to you land lubbers). I can just hear your client having you design a sailing vessel, "All those extra masts and sails cost money, and they're of no value; the sails shield each other. Get rid of 'em". Regards, Fountain E. Conner, P.E. Gulf Breeze, Fl. 32561 ---------- > From: Bohm, Gabriel <GBohm(--nospam--at)kticorp.com> > To: 'seaint(--nospam--at)seaint.org' > Cc: Riddick, Gene <GRiddick(--nospam--at)kticorp.com> > Subject: Shielding > Date: Wednesday, September 09, 1998 7:16 PM > > I have five identical buildings, spaced 16 feet apart. Building height > is 120 feet. Building width is 60 feet - this is the dimension > perpendicular to the wind direction. The dimension parallel to the wind > direction is 20 feet. The buildings are in perfect alignment, such that > the first one effectively shields the other four. > > Normally, we would design one of the five buildings treated as a > self-supporting entity subjected to full wind loading, then simply build > five such structures, with or without interconnecting struts. The > client, of course, understands the cost implications of this approach. > > This time, it's different - the client insists that we take advantage of > wind load reduction due to shielding, and wants the five buildings to be > interconnected and treated as one large structure. > Many thanks, > > Gabe Bohm > San Dimas, California
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