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20 Cards in this Set
- Front
- Back
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Exterior cladding that is supported by the internal structure is called _____________ ________.
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curtain wall
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Name 6 primary functions of cladding.
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1. Keep water out.
2. Prevent air leakage. 3. Control light 4 & 5. Control heat radiation and heat conductivity 6. Control sound |
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What are 3 concepts for making a wall watertight?
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1. Keep water away - deep overhangs
2. Eliminate openings (barrier approach) 3. Eliminate or neutralize forces capable of moving water through wall. |
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What are 5 forces that move water through an opening, and how can path be broken?
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1. Gravity - slanted opening, downward toward outside
2. Momentum - labyrinth 3. Surface tension - provide 'drip' or break in surface 4. Capillary action - provide opening > water drop 5. Air pressure differences - 'rainscreen' pressure equalization chamber |
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Explain rainscreen principle and how it works.
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Create air barrier between backup wall and 'rainscreen' cladding of unsealed labyrinth joints. Air current passes between equalizing pressures. any rain that penetrates is drained.
Compartmentalized for different air pressures across facade. |
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Name 6 secondary functions of cladding.
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1. Resist wind forces.
2. Control water vapor. 3. Adjust to movement; structural, thermal, moisture 4. Resist fire. 5. Weather gracefully. 6. Ease of installation. |
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Masonry veneer is supported on a ________ ___________ _____________.
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steel shelf angle
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Name two types of structural back up wall for masonry veneer and 2 advantages and 1 disadvantage.
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1. CMU (concrete blocks)
Stiff and resistant to water, but heavy. 2. Light-gauge steel frame Lightweight & accommodes wiring, insulation, but deflect in wind and may crack veneer. |
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__________ _________ ________ are used to attach brick veneer to backup wall.
Water between brick wall and backup wall travels to shelf angle and exits through ________ __________. |
Wire brick ties
weep holes |
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How is stone panel cladding installed?
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Stone panels mounted on steel subframe, transferring vertical and lateral loads to bldg frame.
Backer rods and sealant between panels. Non-structural backup wall creates air barrier & carries insulation, wiring, |
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How is stone cladding installed?
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Large sheets of stone are mounted on structural steel trusses.
Attached to bldg structure at brackets, w/ load transferred to structure. Backer rods and sealant between sheets. Also non-structural backup wall. |
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What is the pro and con of pre-cast concrete as a curtain wall?
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PRO: Wide variety of surface finishes
CON: very heavy & add big load to bldg frame |
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What are the pros and cons of aluminium?
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PROS: non-corrosive, variety of finishes, can extrude detailed shapes, highly precise.
CONS: very conductive so requires thermal breaks |
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What are 4 types of assemblies for aluminium systems?
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Stick system
Unit system Panel system Column cover and spandrel system (separate covers for columns and spandrel) |
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A ___________ ________ is used to accommodate thermal expansion in the mullions in the _______ direction.
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telescopic joint
vertical |
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Which of the following is NOT a primary function of cladding?
Keep water out Control light Weathering gracefully Control heat radiation None, all of these are primary functions |
Weathering gracefully
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The force capable of moving water through an opening which can be mitigated by including a properly placed drip is called ______________________.
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surface tension
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A ______________ is a compartmentalised cladding solution that aims to neutralise air pressures through use of an air barrier.
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rainscreen
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In brick veneer cladding systems, water that passes through the porous brick travels down through an air cavity and is purged through "_________ _________", or omitted vertical mortar joints.
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weep holes
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"Stick system" is the mode of assembly of metal and glass cladding systems that is easliy shipped in pieces (low bulk).
TRUE or FALSE |
TRUE
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