The CarbonCast® Double Tee in 12'-, 15'- and 16'-widths can span up to 65'. The C-GRID carbon fiber mesh used in the flange for crack control requires less concrete cover, allowing the member to be up to 8% lighter in weight and more durable than conventional tee flanges, as carbon fiber is not vulnerable to corrosion. 15'- and 16'-wide double tees easily accommodate 45'–48' bays for open and bright interiors and fewer total members than 12'-wide systems. 16'-wide Mega-TEES are especially efficient for end bays, providing increased space for turning.
Quick Points
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Up to 8% lighter than conventional tees
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Reduce superstructure and foundation requirements
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Eliminate the need for chemical sealers and corrosion inhibitors
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Reduce the carbon footprint of parking garages
- Offer superior durability, strength and crack control
- Produced under license from AltusGroup, Inc.
CarbonCast Double Tees comprise the main traffic and parking surfaces within precast concrete parking garages, and may be used as decking and roofing elements on other structures.
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CarbonCast Double Tees shall be kept free of dirt, debris and chloride-laden water. Snow removal equipment shall use a rubberized blade guard. Total distributed weight of such equipment shall not exceed 50 lbs/sq.ft..
CarbonCast Double Tees will be manufactured in accordance with PCI guidelines in a PCI-certified precast manufacturing facility.
Connections for seismic diaphragm may be welded or field-topped pour strips
- Tee to spandrel – pocket or haunch (corbel) gravity connection
Welded (diagram)
Field-topped pour strip (diagram)
- Tee to wall – lateral connection
Welded (diagram)
Field-topped pour strip (diagram)
- Tee to inverted “T” girder – lateral connection
Welded (diagram)
Field-topped pour strip (diagram)
- Tee to tee – lateral connection, welded, using Vector Connector® or equal connection device
Welded (diagram)
Mix: 50% recycled content (per design requirements)
Water-cement ratio: </=.38
Strength: 7-9,000 psi
Color: structural buff or gray
ASTM E 119
3-1/2” flange: 1 hour
4-3/4” flange: 2 hours
Primary reinforcement – twelve strands 1/2" dia. low relaxation, 270ksi special, A = 0.167 in2
Flange reinforcement - C-GRID® carbon fiber mesh
Certification . . . . . . . . . . . . . . . . . PCI Factory Certification
Design. . . . . . . . . . . . . . . . . . . . . . ACI 318-95
Prestress strand . . . . . . . . . . . . . . ASTM A 416
Reinforcing steel. . . . . . . . . . . . . . ASTM A 615
C-GRID carbon fiber mesh . . . . . . . . . . . . ASTM A 185
Structural steel . . . . . . . . . . . . . . . ASTM A 36
Aggregate. . . . . . . . . . . . . . . . . . . ASTM C 33
Cement. . . . . . . . . . . . . . . . . . . . . ASTM C 150 Materials
Dimensional Tolerances:
Length . . . . . . . . . . . . . . . . . . . . . . ± 1/8 in. per 10 ft. 1 in. max.
Width & Depth . . . . . . . . . . . . . . . .±1/4 in.
Stem width . . . . . . . . . . . . . . . . . . . ±1/8 in.
Flange Thickness . . . . . . . . . . . . . ±1/8 in.
Camber deviation . . . . . . . . . . . . . . ±1 in.
Horizontal alignment:
Under 40 ft., ±1/4 in.
40 to 60 ft., ±1/4 in.
Over 60 ft., ±1/2 in.
Differential Camber, prior to erection, adjacent tees: ±3/4 in.
Position of Blockouts and Inserts: ±1/2 in.
Position of Weld Plates: ±1 in.
Erection
CarbonCast Double Tees may be erected by PCI-certified erection crews. Tees and other parking garage components will be tested by an independent testing firm.
Blockouts – prefabricated plastic forms, fit into stems to facilitate mechanical, electrical and plumbing installations (www.highconcreteaccessories.com)
Burke Lift Covers – prefabricated plastic lifter covers in standard and custom colors
Curbs – prefabricated and mechanically attached curbs for car stoppage
Custom configurations – cuts, penetrations and form alterations including warping according to design requirements
Support
Haunches – haunches or corbels may be used as support in walls. The legs of the Pretopped Double Tees will rest on the haunch.
Ledges – ledges may be used to provide support to double tee ends.
Pockets – in some applications it may be appropriate for double tees to be manufactured to fit into a preformed pocket in a wall providing a cleaner visual.
Cast-in-place diaphragms – field-applied pour strips may be used to attain seismic diaphragm performance. This work is performed by others.
Sealers – pretopped double tee decks may be treated with a field-applied sealer to help control corrosion of mild steel reinforcement.
Sealants – caulking of double tee joints is required to ensure watertight performance of the deck. This work is performed by others.
Following are standard load tables for uniformly loaded simple spans. These tables are for guidance only. Individual designs may be furnished for unusual loading conditions, changes in cross section, low camber requirements, etc.
Notes
1. Load span charts are intended for preliminary design only and are based on:
(a) Horizontal single span with unrestrained ends, no cantilever
(b) Uniform superimposed live load (dead load of tee has been deducted)
(c) f’ci = 3500 PSI min. at transfer
(d) Max. extreme fiber stress in tension under full load = 850 PSI
2. Tees will be manufactured with camber. Amount varies with design requirements and will be shown on shop drawings.
3. Tee widths shown are maximums, flanges may be reduced as required.
4. Standard finishes:
TOP: as per designer’s requirements;
BOTTOM & SIDES: smooth from steel forms.
5. Consult High Concrete Group for further assistance.
6. UL ratings available upon request.
Potential precast point contributions to LEED certification
|
Credit |
Title |
LEED 2009 |
|
Sustainable Sites |
|
|
|
SSc5.1 |
Site Development, Protect or Restore Habitat |
1 |
|
SSc7.1 |
Heat Island Effect, Non-Roof |
1 |
|
Materials & Resources |
|
|
|
MRc4.1 |
Recycled Content, 10% (post-consumer + pre-consumer) |
1 |
|
MRc5.1 |
Regional Materials, 10% Extracted, Processed & Manufactured Region |
1 |
|
MRc5.2 |
Regional Materials, 20% Extracted, Processed & Manufactured Region |
1 |
CarbonCast is a registered trademakr of AltusGroup, Inc.
C-GRID is a registered trademark of Chomarat N.A.
LEED is a registered trademark of US Green Building Council.
