ArchitectureWeek Notes No. 398
ArchitectureWeek Editors
editor at architectureweek.com
Fri Sep 26 09:49:05 PDT 2008
Dear ArchitectureWeek Readers,
ArchitectureWeek No. 398 is now available on the Web, with these
new design and building features, and more...
DESIGNING FABRIC STRUCTURES
by Samuel J. Armijos
http://www.ArchitectureWeek.com/today.html
http://www.ArchitectureWeek.com/2008/0924/design_1-1.html
The first step in designing a fabric structure is to
create a form with sufficient pre-stress, or tension, to
prevent it from fluttering like a flag or sail.
Lightweight structures with minimal surfaces optimally
should have double curvature - a surface that possesses
a high-point (positive) curvature along one principal
axis and a low-point (negative) curvature along the other
principal axis.
Anticlastic surface forms have double curvature in
diametrically opposite directions, like a saddle, while
synclastic surface forms have double curvature in the
same direction, like a balloon. The degree of curvature
depends upon the type and weave of the fabric as well as
the type and direction of the loads.
The three basic forms associated with tensioned fabric
structures are the hypar (hyperbolic paraboloid), the
cone, and the barrel vault. The hypar, or simple saddle,
is often a square or rectangular form in plan that in
elevation is a series of high and low points. Mast- and
point-supported structures are cone forms. Arch- and
frame-supported structures, in which the membrane is
supported by a compression member, are barrel vaults.
Determining Boundaries
The second step of the design process is to determine
the boundaries of the tensioned fabric, which is
referred to as the membrane. Boundaries include frames,
walls, beams, columns, and anchor points. The fabric is
either continuously clamped to frames, walls, or beams,
or attached to columns and anchor points with membrane
plates with adjustable tensioning hardware.
... full story continues online (10 images, two free):
http://www.ArchWeek.com/2008/0924/design_1-1.html
Postcard from a Tipping Planet
by Kevin Matthews
http://www.ArchitectureWeek.com/2008/0924/environment_1-1.html
Dear ArchitectureWeek,
Please take a moment to look at this great short
animation from Leo Murray. Just click to play.
... full story continues online (10 images, two free):
http://www.ArchWeek.com/2008/0924/environment_1-1.html
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Shower Design for Aging in Place
by Drue Lawlor and Michael A. Thomas
http://www.ArchitectureWeek.com/2008/0924/building_1-1.html
Customarily, architects, builders, and contractors have
designed, specified, and built curbs at shower entrances
that require users to pick up their feet and step over
and into the shower pan. In some cases, the floor of the
shower pan is lower than the floor of the bathroom.
... full story continues online (10 images, two free):
http://www.ArchWeek.com/2008/0924/building_1-1.html
People and Places
by Nancy Novitski
http://www.ArchitectureWeek.com/2008/0924/news_1-1.html
Thornton Tomasetti in Chicago, Illinois - Leo A Daly in
Los Angeles, California - KMD Architects in Winchester,
Virginia - Creative Resource Associates and Group 70
International in Honolulu, Hawaii - Foster + Partners
in Buenos Aires, Argentina - Hardy McCullah/ MLM
Architects in Fort Worth, Texas - Stephen A. Kliment in
Ebersberg, Germany - Perkins + Will in Los Angeles,
California...
... short stories continue online:
http://www.ArchWeek.com/2008/0924/news_1-1.html
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ES&C Lightweight Concrete in Denver Civic Center Expansion
TXI Expanded Shale & Clay (ES&C) lightweight concrete was
used to help construct a 12-story addition to Denver's Civic
Center. Using structural lightweight concrete offered
significant dead load reduction and created more space per
floor while providing superior fire ratings. Learn more
about this economical expansion at the TXI ES&C website:
http://www.archweek.com/ad.cgi?080924_txi
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Product News - Structural Insulated Roof and Floor Panel from kama
http://www.archweek.com/2008/0924/products_update.html
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Sustaining Infrastructure White Paper from Bentley Systems
Creating a sustainable world through infrastructure requires
addressing three interrelated and complex issues: sustaining
society, sustaining the environment, and sustaining the
infrastructure professions. At stake, says Bentley Senior
Vice President Buddy Cleveland, is our ability to provide an
acceptable quality of life for all of the people on our
planet.
http://www.archweek.com/ad.cgi?080924b_downloads.html
Running Servers in a Tent Outside: It Works - Computer World, 2008.0925
http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleId=9115602&source=NLT_PM&nlid=8
Dassault Systemes Launches "Green" Global Headquarters - Dassault Press Release, 2008.0924
http://www.businesswire.com/portal/site/topix/index.jsp?ndmViewId=news_view&newsId=20080923006415&newsLang=en&ndmConfigId=1000639&vnsId=41
AIA Announces the Release of Six New Documents - AIA Press Release, 2008.0924
http://www.aia.org/release_092408_condocs
Bentley Opens 2009 Student Design Awards Competition - Bentley Press Release, 2008.0924
http://www.bentley.com/en-US/Corporate/News/Quarter+3/2009+Student+Competition.htm
Autodesk Sues SolidWorks - WorldCAD Access, 2008.0923
http://worldcadaccess.typepad.com/blog/2008/09/adsk-vs-sw-battle-moves-to-courtroom.html
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Contents, RSS, and Surface of the Week -
Wood deck beside reflecting pool (FP-011)
http://www.ArchitectureWeek.com/2008/0924/contents.html
This Week's Quiz -
Riverside, Illinois, just outside the city of Chicago,
was one of the first middle-class garden suburbs in the
United States. When was it developed - 1863, 1887,
or 1902?
http://www.ArchitectureWeek.com/2008/0924/quiz.html
Architecture Answer - for last issue's quiz...
There are several forces in nature that work to move
water. Gravity is one force we are familiar with.
Another less familiar one is "capillary action." Please
describe capillary action.
http://www.ArchitectureWeek.com/2008/0924/answer.html
Classic Home 037 - Southwestern bungalow by George W. Repp
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