tensile fabric structures
DESCRIPTION
TRANSCRIPT
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TENSIONED TENSIONED FABRIC FABRIC
STRUCTURESSTRUCTURES
THE COLUMBUS CENTERInner HarborBaltimore, Maryland
CLOSED TENSIONED FABRIC STRUCTURE
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Tensioned Fabric Structure: A structure where the exterior shell is a fabric material spread over a framework. The fabric is maintained in tension in all directions to provide stability.
DENVER INTERNATIONAL AIRPORT
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PIER SIX PAVILIONBaltimore, Maryland
OPEN STRUCTURE
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CHICAGO’S NAVY PIER
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• Unique designsUnique designs
• Lightweight and flexibleLightweight and flexible
• Environmentally sensitiveEnvironmentally sensitive
• High strength weight ratioHigh strength weight ratio
• Little to no rigidityLittle to no rigidity
• Loss of tension is dangerous for Loss of tension is dangerous for stabilitystability
• Thermal values limit useThermal values limit use
DISADVANTAGESDISADVANTAGESADVANTAGESADVANTAGES
• FABRIC STRUCTURES CANNOT TAKE HEAVY WEATHER CONDITIONS FABRIC STRUCTURES CANNOT TAKE HEAVY WEATHER CONDITIONS FALSEFALSE
• FABRIC IS ELASTIC AND STRETCHES Fabric has a strong tensile strength and FABRIC IS ELASTIC AND STRETCHES Fabric has a strong tensile strength and will creep (stretch very slightly) only a few percent over 20 years of use.will creep (stretch very slightly) only a few percent over 20 years of use.
COMMON MISCONCEPTIONSCOMMON MISCONCEPTIONS
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TYPES OF FABRIC STRUCTURES
Saddle roof Mast supported Arch supported Point supported Combinations
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SADDLE ROOF
Four or more point system when the fabric is stretched between a set of alternating high and low points
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MAST SUPPORTED
Tent - like structures containing one or more peaks supported by poles (masts) or a compression ring that connects the fabric to the central support.
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ARCH SUPPORTED
Curved compression members are used as the main supporting elements and cross arches are used for lateral stability.
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ALUMINUM FRAME SUPPORT
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COMBINATIONS
Combination of several support types.
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COMPONENTS
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BASE PLATE
• Connection to concrete foundation pillar
• MAST SUPPORTED
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BALE RING / MEMBRANE PLATE Provide a link between the membrane and structural elements..
Bale rings are used at the top of conical shapes. Membrane plates accept centenary cables and pin connection
hardware.
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MEMBRANEForms the enclosure of the structure. Connections can
be glued or heat welded.
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MEMBRANES
PVC coated polyester (polyvinylchloride)
Silicon coated glass
Teflon coated glass P.T.F.E (polytetrafluroethylene)
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PVC Less expensive 15 to 20 year life span Easy to erect
SILICON GLASS
Higher tensile strength Brittle, subject to damage from flexing 30+ year life span
TEFLON GLASS
Similar to silicon glass, less brittle.
TYPES OF FABRIC MEMBRANES
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SPECIALIZED HARDWARE
Tensioner
Extruded section with membrane plate and centenary cables
Tripod head with centenary cables
Centenary cables at a side connection
SPECIALIZED HARDWARE
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SPECIALIZED HARDWARE
CABLE CLAMPS
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WATER DRAINAGE VIA MEMBRANE PLATESOPEN STRUCTURE
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WATER DRAINAGECLOSED STRUCTURE
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SOLAR BEHAVIOR
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ENVIRONMENTAL IMPACT
Longer life cycles of materials.
Materials can be re-used in form.
Most materials are completely recyclable.
Less impact on site.
Less construction debris after demolition.
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LINKS………………. BIRDAIR, INC. -
www.birdair.com SPRUNG INSTANT STRUCTURES LTD.
www.sprung.com FABRIC ARCHITECTURE
www.fabricarchitecture.co.uk FABRITEC STRUCTURES
www.shadeconcepts.com
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