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Curtainwall Systems

A Curtain wall system is an outer covering of a building in which the outer walls are typically non-structural, but merely keep out the weather. As the curtain wall is non-structural it can be made of a lightweight material reducing construction costs. When glass is used as the curtain wall, a great advantage is that natural light can penetrate deeper within the building. The curtain wall façade does not carry any dead load weight from the building other than its own dead load weight. The wall transfers horizontal wind loads that are incident upon it to the main building structure through connections at floors or columns of the building. A curtain wall is designed to resist air and water infiltration, sway induced by wind and seismic forces acting on the building, and its own dead load weight forces.

Curtain wall systems come in four types; Unitized, Stick-Built, 2-Sided Structural and 4-Sided Structural. Curtain wall Systems are typically designed with extruded aluminum members, although the first curtain walls were made of steel. The aluminum frame is typically infilled with glass, which provides an architecturally pleasing building, as well as benefits such as day lighting. However, parameters related to solar gain control such as thermal comfort and visual comfort are more difficult to control when using highly-glazed curtain walls. Other common infills include: stone veneer, metal panels, louvers, and operable windows or vents are often used in conjunction with glass compliment the overall system design.

Curtain walls differ from store-front systems in that they are designed to span multiple floors, and take into consideration design requirements such as: thermal expansion and contraction; building sway and movement; water diversion; and thermal efficiency for cost-effective heating, cooling, and lighting in the building. Store front systems are often referred to as Window wall systems and they can also be designed to be unitized for utmost efficiency during the construction process.

Rainscreen principle: A common feature in curtain wall technology, the rainscreen principle theorizes that equilibrium of air pressure between the outside and inside of the "rainscreen" prevents water penetration into the building itself. For example the glass is captured between an inner and an outer gasket in a space called the glazing rebate. The glazing rebate is ventilated to the exterior so that the pressure on the inner and outer sides of the exterior gasket is the same. When the pressure is equal across this gasket water cannot be drawn through joints or defects in the gasket.

 





Four Seasons Hotel
Miami, Florida

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System Components

• Stainless Steel Cladded Systems
• Aluminum Extrusions with Thermal Breaks
• Insulating Laminated Low E Glass
• 1” Vertical Movement Stack Joints
• Slab Line Feature Band

Applications

• Exterior & Interior Curtainwalls
Small and Large Missile Impact Tested

Options

• Vision or Spandrel Glass
• Sunshade Louvers of Various Shapes
• Laminated, Insulated & Fritted Laminated Glass
• Multiple Finishes Available




Miami Dade College - Culinary Arts Building
Miami, Florida

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GALLERY



System Components

• Aluminum Extrusions with Thermal Breaks
• Insulating Laminated Glass
• 1” Vertical Movement Stack Joints
• Slab Line Feature Band

Applications

• Exterior Curtainwalls
Small and Large Missile Impact Tested

Options

• Vision or Spandrel Glass
• Sunshade Louvers of Various Shapes
• Laminated or Insulating Laminated Glass
• Multiple Finishes Available






Lynden Pindling International Airport
Nassau, Bahamas

 

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GALLERY

 

 

System Components

• Aluminum Extrusions with Thermal Breaks
• Insulating Laminated Glass
• Sunshade Louvers
• Operable Windows

Applications

• Exterior Curtainwalls
Small and Large Missile Impact Tested

Options

• Multiple Standard Colors Available
• Vision or Spandrel Glass
• Sunshade Louvers (can be fabricated to various shapes and sizes)

 




NR Group Bahamas Int'l Airport

MDC PMU LM Impact GL 4B 8 10
   

MDC PMU LM Impact 1A 04 9 10

MDC PMU LM IMPACT MUL 4 04 9 10
   

Unitized Curtainwall Install #1

Unitized Curtainwall Install #2


Miami-Dade Notice Of Approval (NOA) Documents

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