Tensile Fabric Structures

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Tensile Fabric Structures

  1. 1. TENSIONED FABRIC STRUCTURES THE COLUMBUS CENTER Inner Harbor Baltimore, Maryland CLOSED TENSIONED FABRIC STRUCTURE
  2. 2. 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
  3. 3. PIER SIX PAVILION Baltimore, Maryland OPEN STRUCTURE
  4. 4. CHICAGO’S NAVY PIER
  5. 5. <ul><li>Unique designs </li></ul><ul><li>Lightweight and flexible </li></ul><ul><li>Environmentally sensitive </li></ul><ul><li>High strength weight ratio </li></ul><ul><li>Little to no rigidity </li></ul><ul><li>Loss of tension is dangerous for stability </li></ul><ul><li>Thermal values limit use </li></ul>DISADVANTAGES ADVANTAGES <ul><li>FABRIC STRUCTURES CANNOT TAKE HEAVY WEATHER CONDITIONS FALSE </li></ul><ul><li>FABRIC IS ELASTIC AND STRETCHES Fabric has a strong tensile strength and </li></ul><ul><li>will creep (stretch very slightly) only a few percent over 20 years of use. </li></ul>COMMON MISCONCEPTIONS
  6. 6. TYPES OF FABRIC STRUCTURES <ul><li>Saddle roof </li></ul><ul><li>Mast supported </li></ul><ul><li>Arch supported </li></ul><ul><li>Point supported </li></ul><ul><li>Combinations </li></ul>
  7. 7. SADDLE ROOF <ul><li>Four or more point system when the fabric is stretched between a set of alternating high and low points </li></ul>
  8. 8. MAST SUPPORTED <ul><li>Tent - like structures containing one or more peaks supported by poles (masts) or a compression ring that connects the fabric to the central support. </li></ul>
  9. 9. ARCH SUPPORTED <ul><li>Curved compression members are used as the main supporting elements and cross arches are used for lateral stability. </li></ul>
  10. 10. ALUMINUM FRAME SUPPORT
  11. 11. COMBINATIONS <ul><li>Combination of several support types. </li></ul>
  12. 12. COMPONENTS
  13. 13. BASE PLATE <ul><li>Connection to concrete foundation pillar </li></ul><ul><li>MAST SUPPORTED </li></ul>
  14. 14. <ul><li>BALE RING / MEMBRANE PLATE </li></ul><ul><li>Provide a link between the membrane and structural elements.. </li></ul><ul><ul><li>Bale rings are used at the top of conical shapes. </li></ul></ul><ul><ul><li>Membrane plates accept centenary cables and pin connection hardware. </li></ul></ul>
  15. 15. MEMBRANE Forms the enclosure of the structure. Connections can be glued or heat welded.
  16. 16. MEMBRANES <ul><li>PVC coated polyester (polyvinylchloride) </li></ul><ul><li>Silicon coated glass </li></ul><ul><li>Teflon coated glass P.T.F.E (polytetrafluroethylene) </li></ul>
  17. 17. <ul><li>PVC </li></ul><ul><ul><ul><li>Less expensive </li></ul></ul></ul><ul><ul><ul><li>15 to 20 year life span </li></ul></ul></ul><ul><ul><ul><li>Easy to erect </li></ul></ul></ul><ul><li>SILICON GLASS </li></ul><ul><ul><ul><li>Higher tensile strength </li></ul></ul></ul><ul><ul><ul><li>Brittle, subject to damage from flexing </li></ul></ul></ul><ul><ul><ul><li>30+ year life span </li></ul></ul></ul><ul><li>TEFLON GLASS </li></ul><ul><ul><ul><li>Similar to silicon glass, less brittle. </li></ul></ul></ul>TYPES OF FABRIC MEMBRANES
  18. 18. SPECIALIZED HARDWARE Tensioner Extruded section with membrane plate and centenary cables Tripod head with centenary cables Centenary cables at a side connection SPECIALIZED HARDWARE
  19. 19. SPECIALIZED HARDWARE <ul><li>CABLE CLAMPS </li></ul>
  20. 20. WATER DRAINAGE VIA MEMBRANE PLATES OPEN STRUCTURE
  21. 21. WATER DRAINAGE CLOSED STRUCTURE
  22. 22. SOLAR BEHAVIOR
  23. 23. ENVIRONMENTAL IMPACT <ul><li>Longer life cycles of materials. </li></ul><ul><li>Materials can be re-used in form. </li></ul><ul><li>Most materials are completely recyclable. </li></ul><ul><li>Less impact on site. </li></ul><ul><li>Less construction debris after demolition. </li></ul>
  24. 24. LINKS………………. <ul><li>BIRDAIR, INC. - </li></ul><ul><ul><li>www.birdair.com </li></ul></ul><ul><li>SPRUNG INSTANT STRUCTURES LTD. </li></ul><ul><ul><li>www.sprung.com </li></ul></ul><ul><li>FABRIC ARCHITECTURE </li></ul><ul><ul><li>www.fabricarchitecture.co.uk </li></ul></ul><ul><li>FABRITEC STRUCTURES </li></ul><ul><ul><li>www.shadeconcepts.com </li></ul></ul>end

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