lecture 22- exterior cladding systems a.k.a skins
DESCRIPTION
Lecture 22- Exterior Cladding Systems a.k.a skins. ARCH 330 Materials & Methods Fall 2008. Cladding/ Curtain Wall. Constructed in Place Prefabricated. Cladding. A.K.A Skin Curtain Wall – glass + metal systems. Cladding. Non-load bearing exterior wall enclosure. - PowerPoint PPT PresentationTRANSCRIPT
Lecture 22- Exterior Cladding Systems a.k.a skins
ARCH 330
Materials & MethodsFall 2008
Cladding/ Curtain Wall
• Constructed in Place• Prefabricated
CladdingA.K.A
SkinCurtain Wall – glass + metal systems
Cladding• Non-load bearing exterior wall enclosure.• Most visible, most subject to attack by
natural forces.
• Separates indoor environment from outdoors in such a way that the indoor environment can be maintained at a level suitable for the building's intended use.
Primary Functions of Cladding• Keep Water Out• Prevent Air Leakage• Control Light (heat, glare, ultraviolet)• Control Radiation of Heat • Control Conduction of Heat• Control Water Vapor • Control Sound
Secondary Functions of Cladding• Resist Wind Forces: • Adjust to Movement:
Thermal expansion and contraction, Moisture expansion and contraction, Structural deflections.
• Resist Fire• Weather Gracefully
Forces that Move Water
• Gravity• Momentum • Surface Tension • Capillary Action • Wind/ Air Currents
Rainscreen Principle
• Let wind pressure differences between the outside and inside neutralize themselves
PECPressure Equalization Chamber• Pressure equalized wall design • Airtight barrier at the internal side• Rainscreen - loose fitting jointed layer • Current of air can pass back and forth
through the unsealed joints.
Sealant Joints in Cladding
• Fill/seal the joints • Prevent flow of air and/or water • Permit assembly tolerance• Permit movement
Design Process - Prefabricated (a) Curtain wall manufacturer selected and
made a part of the building design team from the first stages of the project.
(b) The architect prepares a rough design and
performance specification and submit these to several manufacturers for proposals.
STICK
1. Anchor2. Mullion3. Horz rail4. Spandrel panel5. Horz rail6. Glass
Constructed in PlaceStiffening Method• Steel Sub Frame• Back-up Wall of Masonry• Back-up Wall of Light Gauge
Studs
PrefabricatedMethod of Assembly• Stick• Unit• Unit + Mullion• Panel• Column Cover + Sprandrel
Masonry
• Constructed in place• Prefabricated
Metal + Glass
• Prefabricated
Structural Glass
Gehry - Guggenheim
Nicholas Grimshaw and Partners Ludwig Erhard Haus Financial Centre