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curtain wall -skin of building

curtain wall system

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curtain wall -skin of building

  1. 1. CURTAIN WALL SYSTEM Submitted by, ABIDHA KARTHU.E.K SYANECE002 Under the guidance of, Mrs. RAMYA.K.M Asst. Prof. of Civil Engg SIMAT,Vavanoor 1
  2. 2. CONTENT CURTAIN WALL SYSTEM  Introduction  History  What is curtain wall?  Components of curtain wall  Functions  Types of Installation systems  Loads  Rain screen Principle  Maintanance and Repair  Expectations  Case studies  Conclusion  References 2
  3. 3. INTRODUCTION CURTAIN WALL SYSTEM  A curtain wall system is an outer covering of a building  Also called Hanging wall  Influential developments in the history of modern architecture.  Wide usage today 3
  4. 4. HISTORY CURTAIN WALL SYSTEM  Exterior walls of the building take load of entire structure  wide spread use of structural steel and later reinforced concrete  It made use of small columns to support large loads  No requirement of exterior walls  Made it as much as lighter  Wide use of light materials like glass  Curtain walls are born 4
  5. 5. WHAT IS CURTAIN WALL? CURTAIN WALL SYSTEM  Definition “A curtain wall system is an outer covering of a building in which the outer walls are non-structural, but merely keep the weather out and the occupants in.” Fig 1:Curtain wall 5
  6. 6. CURTAIN WALL SYSTEM  Light weight wall systems installed outside of building structure  The name derives from the idea that the wall is thin and hangs like a curtain on the structural frame  Design to resist wind and rain  Also accommodate building drift and seismic movements  Skin of the building  Seperator between interior and outdoor environments 6
  7. 7. CURTAIN WALL SYSTEM Fig 2:Concept of Curtain wall 7
  8. 8. COMPONENTS OF CURTAIN WALL CURTAIN WALL SYSTEM Fig 3:Components 8
  9. 9. CURTAIN WALL SYSTEM  Curtain wall mullion-Vertical component  Curtain wall transom-Horizontal component  Glass  Transparent  Wide spread usage  Light weight 9
  10. 10. OTHER MATERIALS CURTAIN WALL SYSTEM  Fabric veneer • Less expensive • Faster to install • Easy to modify • Low density • Light weight Fig 4: Fabric veneer 10
  11. 11. CURTAIN WALL SYSTEM  Stone veneer Fig 5:Stone veneer • Thin blocks of 3-4 inches • Should have proper shape and size • Aesthetic appearance 11
  12. 12. CURTAIN WALL SYSTEM  Panel CURTAIN WALL SYSTEM12 • It may be aluminium, aluminium composite or copper Fig 6:Panels 12
  13. 13. CURTAIN WALL SYSTEM  Louvers CURTAIN WALL SYSTEM13 • Installed at ventilation and fresh air required area • Allow to filter outside air Fig 7:Louvers 13
  14. 14. CURTAIN WALL SYSTEM  Windows and Vents CURTAIN WALL SYSTEM14 • It gives both glaze and ventilation to the building Fig 8:Windows and Vents 14
  15. 15. FUNCTIONS CURTAIN WALL SYSTEM  Protecting the interior from environmental effects  Natural lighting  Provide occupant comfort  Keeps water out  They are expected to perform acceptably when exposed to natural disasters 15
  16. 16. TYPES OF INSTALLATION SYSTEMS Stick-built curtain wall system Unitized curtain wall system CURTAIN WALL SYSTEM  Installed piece by piece at site  Thermal expansion and contraction of mullions are accomodated by expansion joints  System components are shop fabricated and shipped  Units are shop fabricated and pre- assembled  Units are designed so that the horizontal and vertical members in adjacent units interlock to form common mullions and rails16
  17. 17. CURTAIN WALL SYSTEM  Greater degree of on site adjustments  Low shipping cost  Lower degree of site adjustments  Have greater degree of quality control resulting from shop fabrication  Lower field installation cost  Ensure progress of project  Shorter construction period 17
  18. 18. CURTAIN WALL SYSTEM18 DISADVANTAGES  Too many loss parts and components on site  Poor acoustics and thermal insulation  Requires different trade men  More onsite labours required  Longer onsite assembly time DISADVANTAGES  High skilled labours required  High shipping cost  Need higher degree of protection of units when transportation  Requirement of expensive lifting equipments on site
  19. 19. CURTAIN WALL SYSTEM19
  20. 20. CURTAIN WALL SYSTEM20
  21. 21. LOADS CURTAIN WALL SYSTEM  Dead load  Wind load  Seismic load  Snow load  Thermal load  Blast load 21
  22. 22. RAINSCREEN PRINCIPLE CURTAIN WALL SYSTEM  Equilibrium of air pressure between exterior and interior of the curtain wall  Minimizes the force which drives moisture through outer wall  External cladding must be able to perform structurally against wind loads when pressure equalization occurs 22
  23. 23. CURTAIN WALL SYSTEM  PROBLEM Differences in air pressure push water into cladding  SOLUTION Pressure equalization chamber 23
  24. 24. CURTAIN WALL SYSTEM24 Fig 9:Equalization chamber
  25. 25. MAINTANANCE AND REPAIR CURTAIN WALL SYSTEM  Aluminum frames are generally painted or anodized  Care must be taken when cleaning areas around anodized material  Application of fluoropolymer thermoset  Anodized aluminum frames cannot be ”re- anodized” in place, but can be cleaned and protected by proprietary clear coatings  Use of specially textured matte stainless steel surface finishes  Use of Stainless steel curtain walls 25
  26. 26. EXPECTATIONS CURTAIN WALL SYSTEM  Use of transparent elements  Use architectural glass or other glazing products  Conserve energy  Provide occupant comfort  Innovation of self cleaning glass 26
  27. 27. CASE STUDIES CURTAIN WALL SYSTEM27
  28. 28. 1)BURJ KHALIFA,DUBAI CURTAIN WALL SYSTEM28  Unitized panels  With a surface area of 1.2 million square feet  Comprises roughly 28,000 prefabricated panels  Double-layer glass set within extruded aluminum frames Fig 10:Burj Khalifa,Dubai
  29. 29. 2) OTERPRISE SQUARE, 26 NATHAN ROAD, HONG KONG, CHINA CURTAIN WALL SYSTEM29  27-storey office tower  Semiunitized curtain wall  Operatable windows  Louvres  Curved feature covers  splayed glass skin  Contract value:$1,400,000 Fig 11: Oterprise Square
  30. 30. 3) CALAKMUL, SANTA FE, MEXICO CURTAIN WALL SYSTEM30  Four-sided Structural Stick System Curtain Wall  Aluminium panels for 6-storey office  Ornate office building and exhibition centre with award-winning design.  Contract value:$1,600,000 Fig 12: Calakmul, Santa Fe
  31. 31. 4) CHENG LOONG PLAZA, TAIPEI,TAIWAN CURTAIN WALL SYSTEM31  Unitized Curtain Wall  29-storey office building  full curtain wall envelope  High performance glass and aluminium panels.  Contract value:$3,000,000 Fig 13: Cheng Loong Plaza
  32. 32. 5)LIPPO CENTRE,HONG KONG,CHINA CURTAIN WALL SYSTEM32  Twin 46 and 44 storey office towers  Stick curtain wall with vents  Contract value:$4,500,000 Fig 14:Lippo Centre, Hong Kong
  33. 33. CONCLUSION CURTAIN WALL SYSTEM  Curtain wall is an essential part of building today,because of its functions,light weight,rapid constructions and also signicant aesthetic freedom  It is a major and unique invention in Civil Engineering field 33
  34. 34. REFERENCES CURTAIN WALL SYSTEM34  Light weight curtain walls- Problems&recent treands ,Richard L. Hess S.E. and Aswin Rangaswamy,ASCE 2004  Numerical Simulation and Verification of CurtainWall Systems under Shock Pressure M. Nawar; H. Salim, A.M.ASCE, B. Lusk; and S .Kiger, F.ASCE  Curtain Wall Designs for Wind and Blast:Three Case Studies Charles D. Clift, F.ASCE
  35. 35. CURTAIN WALL SYSTEM35

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