• Advanced Composite Design• U Values as low as 0.21• CRF (frame) up to 90• 20 PSF Water Tested/Certified• 60 PSF Design Pressure
The Fusion Of Strength And Efficiency
Curtain Wall Systems
Finally, a curtain wall framing system that equals the thermal performance of glass.
FM Graham’s GThurm™ curtain wall provides unsurpassed thermal resistance in an engineered composite
design using continuous strand glass reinforcement to match the strength of aluminum.
TYPE TEST SIZEAIR
(cfm/ft2)at 50 mph
WATER(psf)
DESIGN PRES-SURE(psf)
UNIFORM LOAD
STRUCTURAL(psf)
U-VALUECRF
FrameDbl IGGlass
TripleIG Glass
GThurm Curtain Wall 80 x 80 0.01 20 60 90 0.34 0.21 90
GThurm HIGHLIGHTS• U values as low as 0.21• CRF (frame) up to 90• Low embodied energy• Installs using the same anchorage designs
as our aluminum systems• Engineered profiles use continuous strand
glass reinforced composite to equal alumi-num structural performance
STANDARD FEATURES• 10 - Year limited warranty• Fully captured or vertically butt glazed• Split finish
Exterior finish - 2605 or anodizedInterior finish 624*
• Stainless steel fasteners• Isolator gasket installed at factory• GThurm pressure plate pre-drilled and
weeped to reduce field labor• EPDM glazing gaskets• Factory fabricated and assembled frames• Snap covers available in various depths
and profiles
OPTIONAL FEATURES• Sunshades• Light shelves• Zero sight line vent
GLAZING OPTIONS• Single, double, or triple insulated glass• Insulating glass units up to 11/2” thick
* AAMA 624 finish for fiberglass is comparable to AAMA 2604 for aluminum
AluminumSnap Covers
Glazing PocketsAccommodate
Infill Thicknesses up to 1-1/2”
High Strength GThurm Composite
Tubular Framing Profiles
Split Mullion Design to Accommodate Factory
Assembled Frames, Setting Tolerances, and Field
Movements
7-1/2”(with 1-1/2” glazing)
5”
2-1/2”
GThurm VERTICAL STACK(shown with triple glazing)
Using our decades of combined engineering experience with aluminum curtain wall, we designed our GThurm fiberglass composite curtain wall to match aluminum’s strength while far surpassing it in thermal performance.
GThurm curtain wall uses the same sound principles of weathering and anchorage proven in our aluminum products.
We pultrude GThurm curtain wall using our revolutionary G2RP process, featuring continuous stranded glass fiber embedded in polyurethane. G2RP exhibits extraordinarily high thermal resistance, high strength, and it’s highly resistant to condensation.
Our GThurm curtain wall was designed to equal the structural performance of our aluminum products.
The G2RP framing components virtually eliminate the thermal conductivity issues experienced with aluminum framing. Our 80% glass G2RP framing creates a homogenous relationship with the glass it encases.
“G2RP has 700 times less thermal conductivity than aluminum”
G2RP is an advanced fiberglasscomposite consisting of 80% continuous glass fiber thermally set with
20% Bayer® Baydur® polyurethane resin. G2RP exhibits a flexural strength of nearly 300% higherthan typical polyester and vinyl ester fiberglass.
GThurm framing is essentially all thermal break. Aluminum framing must compromise the structure by incorporating supplemental thermal breaks to separate warm and cold surfaces.
GThurm curtain wall is nearly immune from typical aluminum system problems like thermal “short circuits” and thermal expansion in the “warm side” of systems. GThurm is 700 times less conductive than aluminum, virtually eliminating the cold spots that can lead to damaging condensation problems.
Thermal Performance Modeling
StressKPSI
Strain - in/in
GThurm Modulus of elasticity 8000 KPSI
6061 T6 Aluminum Modulus of elasticity
10,000 KPSI
GThurm6061 T6 aluminum
Aluminum deformsat 40 KPSI
Modulus of elasticity comparisons of GThurm and aluminum show that while the initial strength of aluminum is greater, GThurm continues to exhibit high strength long after aluminum deflects.
Actual Therm 6.3 thermal modeling results showing a comparison between conventional aluminum and GThurm.
Conventional aluminum curtain wall
GThurmPressure Plate
TYPE TEST SIZEAIR
(cfm/ft2)at 50 mph
WATER(psf)
DESIGN PRES-SURE(psf)
UNIFORM LOAD
STRUCTURAL(psf)
U-VALUECRF
FrameDbl IGGlass
TripleIG Glass
GThurm Curtain Wall 80 x 80 0.01 20 60 90 0.34 0.21 90
GThurm HIGHLIGHTS• U values as low as 0.21• CRF (frame) up to 90• Low embodied energy• Installs using the same anchorage designs
as our aluminum systems• Engineered profiles use continuous strand
glass reinforced composite to equal alumi-num structural performance
STANDARD FEATURES• 10 - Year limited warranty• Fully captured or vertically butt glazed• Split finish
Exterior finish - 2605 or anodizedInterior finish 624*
• Stainless steel fasteners• Isolator gasket installed at factory• GThurm pressure plate pre-drilled and
weeped to reduce field labor• EPDM glazing gaskets• Factory fabricated and assembled frames• Snap covers available in various depths
and profiles
OPTIONAL FEATURES• Sunshades• Light shelves• Zero sight line vent
GLAZING OPTIONS• Single, double, or triple insulated glass• Insulating glass units up to 11/2” thick
* AAMA 624 finish for fiberglass is comparable toAAMA 2604 for aluminum
AluminumSnap Covers
Glazing PocketsAccommodate
Infill Thicknesses up to 1-1/2”
High Strength GThurm Composite
Tubular Framing Profiles
Split Mullion Design to Accommodate Factory
Assembled Frames, Setting Tolerances, and Field
Movements
7-1/2”(with 1-1/2” glazing)
5”
2-1/2”
GThurm VERTICAL STACK(shown with triple glazing)
Using our decades of combined engineering experience with aluminum curtain wall, we designed our GThurm fiberglass composite curtain wall to match aluminum’s strength while far surpassing it in thermal performance.
GThurm curtain wall uses the same sound principles of weathering and anchorage proven in our aluminum products.
We pultrude GThurm curtain wall using our revolutionary G2RP process, featuring continuous stranded glass fiber embedded in polyurethane. G2RP exhibits extraordinarily high thermal resistance, high strength, and it’s highly resistant to condensation.
Our GThurm curtain wall was designed to equal the structural performance of our aluminum products.
The G2RP framing components virtually eliminate the thermal conductivity issues experienced with aluminum framing. Our 80% glass G2RP framing creates a homogenous relationship with the glass it encases.
“G2RP has 700 times less thermal conductivity than aluminum”
G2RP is an advanced fiberglasscomposite consisting of 80% continuous glass fiber thermally set with
20% Bayer® Baydur® polyurethane resin. G2RP exhibits a flexural strength of nearly 300% higherthan typical polyester and vinyl ester fiberglass.
GThurm framing is essentially all thermal break. Aluminum framing must compromise the structure by incorporating supplemental thermal breaks to separate warm and cold surfaces.
GThurm curtain wall is nearly immune from typical aluminum system problems like thermal “short circuits” and thermal expansion in the “warm side” of systems. GThurm is 700 times less conductive than aluminum, virtually eliminating the cold spots that can lead to damaging condensation problems.
Thermal Performance Modeling
StressKPSI
Strain - in/in
GThurm Modulus of elasticity 8000 KPSI
6061 T6 Aluminum Modulus of elasticity
10,000 KPSI
GThurm6061 T6 aluminum
Aluminum deformsat 40 KPSI
Modulus of elasticity comparisons of GThurm and aluminum show that while the initial strength of aluminum is greater, GThurm continues to exhibit high strength long after aluminum deflects.
Actual Therm 6.3 thermal modeling results showing a comparison between conventional aluminum and GThurm.
Conventional aluminum curtain wall
GThurmPressure Plate
7/2011 3M TP
1101 North Mill StreetMerrill, WI 54452715.536.4927www.fmgraham.com
Graham Architectural ProductsMade in the USA
F Outside Corner
Vertical StackE
Horizontal @ FloorG
Inside CornerH
Butt Glazed Vertical
J
HeadA
HorizontalB
SillC
D Jamb
A
B
C
D
E
GH
JF
A
B
D
C
E
FM Graham | P.O. Box 506 | 1101 North Mill Street | Merrill, WI 54452
FM GrahamGThurm™ Composite Curtain WallStandard Details, 1/2 ScaleStandard Details
For butt glazed vertical
see detail “J”
A
C
Elevation of Typical Captured Wall
C
D F
H
E
G
E
C
B
E
D
B
B
H
F
A
C
Elevation of Typical Captured Wall
C
D F
H
E
G
E
C
B
E
D
B
B
H
F
J
FM Graham | P.O. Box 506 | 1101 North Mill Street | Merrill, WI 54452
FM GrahamGThurm™ Composite Curtain WallStandard Details, 1/2 Scale
PRIMARY
ROUG
H O
PNG
Varie
s
SECONDARY SEAL SEAL
CONDITIONBUILDING
INTERIOR COSMETIC SEAL
2 1/
2
1/2
GLAS
S BI
TEFRAM
E DI
M
DLO
51 1/23/4
7 1/4
Head
FG100
#14x1" HWHSMS @ 6" O/C
WEEP
3" PVC SPACER,9" O/C.
3080 DENSE EPDM GASKET (TYPICAL)
1" INSULATEDGLASS
ALUMINUM COVER
FM Graham | P.O. Box 506 | 1101 North Mill Street | Merrill, WI 54452
FM GrahamGThurm™ Composite Curtain WallStandard Details, 1/2 Scale
2 1/
2
1/2
GLAS
S BI
TE
1/2
GLAS
S BI
TE
5
DLO
1 1/23/4
7 1/4
DLO
Horizontal
FG100
FG101
#14x1" HWHSMS @ 9" O/C
1" INSULATEDGLASS
3080 DENSE EPDMGASKET (TYP.)
WEEP
LINE OFCOVER
ALUMINUM COVER
FM Graham | P.O. Box 506 | 1101 North Mill Street | Merrill, WI 54452
FM GrahamGThurm™ Composite Curtain WallStandard Details, 1/2 Scale
SEALPRIMARY
ROUG
H O
PNG
Varie
s
SEALSECONDARY
BUILDINGCONDITION
INTERIOR COSMETIC
SHIM UNDER VERT'S
SEAL
ERECTOR DEAD LOAD
2 1/
2
1/2
GLAS
S BI
TE
FRAM
E DI
M
DLO
51 1/23/4
7 1/4
Sill
#14x1" HWHSMS @ 6" O/C
1" INSULATEDGLASS
3080 DENSE EPDMGASKET (TYP.)
WEEP
VERTICALCOVER
ALUMINUM COVER
FM Graham | P.O. Box 506 | 1101 North Mill Street | Merrill, WI 54452
FM GrahamGThurm™ Composite Curtain WallStandard Details, 1/2 Scale
ROUGH OPNG
Varies
BUIL
DING
COND
ITIO
NSE
COND
ARY
SEA
L S
EAL
PRIM
ARY
INTE
RIO
R CO
SMET
IC S
EAL
Jamb
HORIZONTAL COVER
#14x1" HWHSMS @ 6" O/C
1" INSULATEDGLASS
3080 DENSE EPDMGASKET (TYP.)
PRIMARYSEAL
3" PVC SPACER@ 9" O/C
2 1/2DLO
FRAME DIM
1/2
GLASS BITE
1 1/
23/
4
7 1/
4
ALUMINUM COVER
FM Graham | P.O. Box 506 | 1101 North Mill Street | Merrill, WI 54452
FM GrahamGThurm™ Composite Curtain WallStandard Details, 1/2 Scale
Vertical Stack
3080 DENSE EPDMGASKET (TYP.)
ERECTOR SEAL
1" INSULATEDGLASS
W'STRIP
ALUMINUM HORIZONTAL COVER#14x1" HWHSMS @ 6" O/C
W'STRIP
ALUMINUM COVER
1 1/4
1/16
1 1/4 DLODLO
FRAME DIMFRAME DIM
1/2
GLASS BITE
1/2
GLASS BITE
51
1/2
3/4
7 1/
4
FM Graham | P.O. Box 506 | 1101 North Mill Street | Merrill, WI 54452
FM GrahamGThurm™ Composite Curtain WallStandard Details, 1/2 Scale
CAVITY WITH BATTERECTOR TO FILL
INSULATION
FORMED ALUM. TRIMWITH END CAPS
#10 SS FH SMS
#10 SS PH SMS
3/4 x 3/4 x 1/16ALUM. ANGLE
6 1/4
6 1/
4
Outside Corner
#14x1" HWHSMS @ 6" O/C
#14x
1" H
WH
SMS
@ 6
" O/C
Aluminum Cover
Aluminum Cover
2 1/2DLO
FRAME DIM
1/2
GLASS BITE
2 1/
2DL
O
FRAM
E DI
M
1/2
GLAS
S BI
TE
FM Graham | P.O. Box 506 | 1101 North Mill Street | Merrill, WI 54452
FM GrahamGThurm™ Composite Curtain WallStandard Details, 1/2 Scale
Horizontal @ Floor
#14x1" HWHSMS @ 6" O/C
1" INSULATEDGLASS
3080 DENSE EPDMGASKET (TYP.)
WEEP
LINE OFCOVER
ANCHOR FROM MULL TOFLOOR SLAB VARIES
2 1/
2
1/2
GLAS
S BI
TE
1/2
GLAS
S BI
TE
5
DLO
1 1/23/4
7 1/4
DLO
Aluminum Cover
FM Graham | P.O. Box 506 | 1101 North Mill Street | Merrill, WI 54452
FM GrahamGThurm™ Composite Curtain WallStandard Details, 1/2 Scale
CAVITY WITH BATTERECTOR TO FILL
INSULATION
DLO
FRAM
E DI
M
2 1/
2
DLO
FRAME DIM
2 1/2
FORMED ALUM. TRIMWITH END CAPS
#10 SS FH SMS
#10 SS FH SMS
#10 SS PH SMS
3/4 x 3/4 x 1/16ALUM. ANGLE
FORMED ALUM. TRIM
Aluminum Cover
Inside Corner
#14x1" HWHSMS @ 6" O/C
FM Graham | P.O. Box 506 | 1101 North Mill Street | Merrill, WI 54452
FM GrahamGThurm™ Composite Curtain WallStandard Details, 1/2 Scale
FG102 FG104
FG104FG103
W'STRIP
W'STRIP
1 1/4
±1/16
1 1/4 DLODLO
WIN. DIM.WIN. DIM.
1 1/32
GLASS BITE
1 1/32
GLASS BITE
1/2
1/16
ROUGH OPG
1 1/4
±1/16
1 1/4 DLODLO
WIN. DIM.WIN. DIM.
1/2 GLASS BITE 1/2 GLASS BITE
J
Butt Glazed Vertical