or more in thickness. The wythes sandwich a layer of continuous insulation (ci) of 2
Bethlehem, PA (Vocus) April 14, 2010
CarbonCast Insulated Architectural Cladding from AltusGroup precasters ( http://www.altusprecast.com ) offers weight reductions of about 40% compared to solid, 6" thick precast concrete wall panels and is engineered to deliver insulation values of R-8 or more.
CarbonCast Insulated Architectural Cladding is an insulated sandwich-type wall panel with inner and outer concrete wythes of 1.75" or more in thickness. The wythes sandwich a layer of continuous insulation (ci) of 2" or more (usually up to 4") to meet ASHRAE 90.1 2007 requirements. CarbonCast Insulated Architectural Cladding uses C-GRID® carbon fiber grid shear trusses to connect the inner and outer wythes of concrete, creating a strong connection with negligible thermal transfer.
Reducing the amount of concrete lowers the panel weight. Inner and outer wythes of 1.75" result in total concrete thickness of 3.5". That’s 40 percent less concrete than a conventional 6"-thick precast panel, which decreases embodied energy. CarbonCast Insulated Architectural Cladding can also use C-GRID for reinforcement in the panel’s face when concrete cover requirements—for example, deep reveals—limit the use of welded wire mesh.
CarbonCast Insulated Architectural Cladding features edge-to-edge continuous insulation that delivers 100 percent of its rated R-value without thermal bridges or solid zones. The resulting thermally efficient panel provides steady-state R-values of R-8 or more depending on how much insulation is incorporated between the panel’s inner and outer wythes. AltusGroup precasters can use either EPS or XPS insulation depending on design requirements.
Additionally, the physical properties of precast concrete provide a beneficial thermal lag effect that can further reduce HVAC demands.
CarbonCast Insulated Architectural Cladding uses C-GRID® shear trusses to connect the inner and outer wythes of concrete. CarbonCast Insulated Architectural Cladding can also incorporate C-GRID into the exterior face when concrete cover requirements—for example, deep reveals limit the use of welded wire mesh. Reducing the amount of concrete lowers the panel weight. Inner and outer wythes of 1.75" result in total concrete thickness of 3.5".
The design of this CarbonCast system is based on the extensively tested CarbonCast High Performance Insulated Wall Panel. CarbonCast Insulated Architectural Cladding is intended for horizontal or vertical placement as a non-load-bearing spandrel or column cover. The similarity in sandwich design means the CarbonCast Insulated Architectural Cladding is engineered to exhibit the exceptional strength and durability benefits of its load-bearing predecessor.
? Reduced load/substructure: In most cases, lighter panels mean the building’s substructure and foundation can be engineered for less dead load, resulting in cost savings and a lower carbon footprint.
? Lower transportation costs: Precasters can ship more panels on each flatbed truck, lowering costly fuel consumption.
? Smaller cranes: Crane size—and expense— can be reduced with lower-weight panels
? Seismic performance: Lighter panels are generally more desirable in high-seismic areas.
AltusGroup precasters are able to incorporate a variety of architectural finishes into CarbonCast Insulated Architectural Cladding to create a distinct, expressive facade that will meet a wide variety of design needs. An assortment of architectural elements such as cornices, bullnoses and reveals can be cast into the concrete carefully and cost-efficiently. Thin brick can also be used instead of full-depth brick as well as simulated limestone or granite instead of extracted rock to further reduce raw material extraction and the energy associated with processing and shipment.
In addition, CarbonCast Insulated Architectural Cladding can be specified with a prefinished interior wythe. A steel-trowel treatment during manufacturing imparts a smooth, durable, ready-to-paint surface ideal for applications like dormitories and apartments. CarbonCast Insulated Architectural Cladding is ideal for mid- and high-rise office buildings, multi-unit residential, mixed use commercial-residential, healthcare, educational and hotels/dormitories.
The first-ever national partnership of precast companies, AltusGroup was founded to develop, manufacture and market precast innovations such as the breakthrough CarbonCast™ line of products featuring C-GRID carbon fiber grid reinforcing. With more than three dozen structural and architectural locations in the United States, AltusGroup companies have an unparalleled national network of manufacturing plants, technical staff and sales personnel to ensure architects, engineers and contractors that they will get the help they need—and the quality and performance they expect—when they select reinforced CarbonCast products. For more information, visit altusprecast.com or call 866-GO-ALTUS.
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