CarbonCast Double Tees
CarbonCast Double Tees: less weight, more durability
CarbonCast® Double Tees from AltusGroup® replace conventional steel mesh reinforcing in the flange with C-GRID carbon fiber grid. Because C-GRID does not corrode, you don’t have to worry about the potential for concrete degradation, cracking or spalling.
- Up to 8% lighter, reducing superstructure and foundation requirements
- Eliminate the need for chemical sealers and corrosion inhibitors
- Reduce the carbon footprint of parking garages
- Offer superior durability, strength and crack control
See potential LEED® point contributions for CarbonCast Double Tees
CarbonCast Double Tees can use 1/2″ less concrete cover in their flanges—reducing weight up to 8%, or 6 lbs/sf, which reduces embodied energy and associated greenhouse gas emissions. Using lighter weight components can be an important strategy in achieving energy efficiency in sustainable projects, particularly for open air structures such as parking structures that typically have few if any conditioned spaces.
With non-corrosive C-GRID® reinforcing in CarbonCast® Double Tees, you can forego epoxy or sacrificial barrier coatings on the steel and eliminate the need to add corrosion-inhibiting admixtures to the concrete or apply sealers to the deck surface. Best of all, you can eliminate the cost and hassle of re-applying these sealers every five years.
George Mason University Parking Structure, Fairfax, VA, is 606,000 sq. ft. structure with 1,552 pieces of structural and architectural precast.
Laboratory testing affirms a number of CarbonCast’s performance characteristics. Fire tests show that they can meet ASTM E119 requirements for a one-hour fire rating. Calculations based on ICC codes and accepted design criteria show that, just like steel mesh reinforced tees, they can provide a two-hour fire rating with 4-3⁄4″ thick flanges.
