Page 1
One Piece Corner Unit Assembly Instructions Volume 3 of 6 - Sections 7 - 10
Unit Corner
Mullion
July 2011
PART NO. Y803
Page 2
EFCO 2009 Page 2
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Table of Contents
Volume 1 of 6
1. General Notes and Guidelines
2. Parts Identification
3. Frame Assembly
Volume 2 of 6
4. Unit Glazing Preparation : SSG and Captured
5. SSG Unit Glazing
6. Captured Unit Glazing
Volume 3 of 6
SECTION PAGE
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
7. Outside 90° Corner Frame Assembly
A. Mullion Subassembly…………………………………………..…………………
B. Unit Frame Assembly……………………………………………………………..
8. Inside 90° Corner Frame Assembly
A. Mullion Subassembly…………………………………………..…………………
B. Unit Frame Assembly……………………………………………………………..
9. Outside 90° Corner Unit Glazing Preparation : SSG and Captured……………….
10. Inside 90° Corner Unit Glazing Preparation : SSG and Captured………………...
Volume 4 of 6
11. Outside 90° Corner SSG Unit Glazing
12. Inside 90° Corner SSG Unit Glazing
13. Outside 90° Corner Captured Unit Glazing
14. Inside 90° Corner Captured Unit Glazing
4 - 7
8 - 12
13 - 16
17 - 23
24 - 25
26 - 27
Note: Assembly Instructions are provided as a supplement, and should be used in conjunction with
the approved shop drawings.
EFCO 2009 Page 2
Page 3
EFCO 2009 Page 3
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Table of Contents
Volume 5 of 6
15. General Notes and Guidelines
16. Size Limitations
17. Standard Hardware Identification
18. Frame Assembly - Vent at Fixed Horizontal
19. Frame Assembly - Vent at Stack Sill
20. Unit Glazing Preparation - Vent at Fixed Horizontal
21. Unit Glazing Preparation - Vent at Stack Sill
22. SSG Vent Unit Glazing at Fixed Horizontal
23. SSG Vent Unit Glazing at Stack Sill
24. Captured Vent Unit Glazing at Fixed Sill
25. Captured Vent Unit Glazing at Stack Sill
26. Assembly and Glazing - SSG Vent at Fixed Horizontal
27. Assembly and Glazing - SSG Vent at Stack Sill
28. Assembly and Glazing - Captured Vent at Fixed Horizontal
29. Assembly and Glazing - Captured Vent at Stack Horizontal
30. Hardware Mounting On Unit Assembly
31. Hardware Mounting On Sash
32. Mounting Vent Assembly Into Unit Assembly
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Note: Assembly Instructions are provided as a supplement, and should be used in conjunction with
the approved shop drawings.
EFCO 2009 Page 3
Page 4
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume
Table of Contents
Volume 6 of 6
33. Shadow Box Assembly
34. Shadow Box Installation
35. Shadow Box Insulation Installation
36. Back Panel Installation
37. Back Panel Insulation Installation
38. Final Cleaning
Minimizing Condensation
Note: Please reference EFCO's "Understanding Condensation" brochure which can be obtained through your EFCO
representative.
Condensation will form on any surface when unfavorable conditions (interior temperature and relative humidity and
exterior temperature) are present. When the formation of excessive condensation is a concern, it is highly recommend ed that a
design professional is utilized to perform an analysis of the shop drawings to recommend the best possible installation methods.
Please contact your EFCO representative for information on EFCO's Thermal Analysis Services.
Many current installation practices lead to an increase in the possibility of the formation of condensation. Though not all
inclusive, the list of examples below illustrates conditions under which condensation is lik ely to occur:
1. Bridging system thermal break with non-thermally broken metal flashing or lintels th at are exposed to the exterior
2. System exposure to cold air cavities
3. Interior relative humidity levels not maintained at recommended levels, see EFCO’s “Understanding
Condensation” brochure
4. Inadequate separation between system and surrounding condition at perimeter
5. Product combinations during the shop drawing stage that result in bridging thermal breaks
of one or all products involved
Note: Assembly Instructions are provided as a supplement, and should be used in conjunction with
the approved shop drawings.
EFCO 2011 Page 4
Page 5
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 7 - Outside 90° Corner Unit Frame Assembly : A. Mullion Subassembly
1. Assemble anchor kits by screwing in the M170 set screw into the bottom of the FM07 mullion anchors until the set screw is flush with the bottom of the
anchor. (Left and Right Hand Assemblies Required)
2. Slide the FM05 or FM06 hook anchor into the FM07 mullion anchor as shown in Figure 1 and 2. See END VIEW on page 6 for part orientation.
3. For the dead load anchor, screw a M169 hex head bolt into the top of the FM07 mullion anchor, half way into the anchor so that 1 3/4” of the bolt extends
from it. See Figure 1 below. For the wind load anchor, screw a M170 socket set screw in the top of the anchor, flush with the top of FM07 as shown in
Figure 2, below.
TOP
FM06 Hook
Anchor
FM07 Mullion
Anchor
M170 Socket Set Screw
(Set flush with bottom of FM07)
M170 Socket Set Screw
(Set flush with top of FM07)
FM06 Hook
Anchor
FM07 Mullion
Anchor
M170 Socket Set Screw
(Set flush with bottom of FM07)
TOP
BOTTOM
BOTTOM
M169 Hex
Head Bolt
FM05 Hook
Anchor
FM07 Mullion
Anchor
FM05 Hook
Anchor
FM07 Mullion
Anchor
DEAD LOAD
ANCHOR
Figure 1
WIND LOAD
ANCHOR
Figure 2
RIGHT HAND
ASSEMBLY
KV09
RIGHT HAND
ASSEMBLY
KV15
TOP
LEFT HAND
ASSEMBLY
KV10
BOTTOM
TOP
LEFT HAND
ASSEMBLY
KV16
BOTTOM
EFCO 2009 Page 5
Page 6
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 7 - Outside 90° Corner Unit Frame Assembly : A. Mullion Subassembly
4. Apply the mullion anchor assemblies to the unit
corner mullions (KV09 and KV10). Insert (3) bolts
(3/8”-16 x 4 1/2” HX-MS 18-8) through the
anchors and mullion.
5. Use right and left hand corner anchor assemblies
to orient the tops of the anchors and mullion as
shown and noted in Figures 3, 4 and the END
VIEW, and insert the bolt through the anchors and
mullion.
6. Secure the anchors with (3) 3/8”-16 nylon insert
stop nuts (M172).
Top of
Mullion
Anchor As s embly
(KV10)
3/8”-16 x 4 1/2”
HX-MS 18-8
Figure 3
M172
Anchor As s embly
(KV09)
Unit Corner
Mullion
Anchor
Assembly
Top of
Mullion
Anchor As s embly
(KV10)
Unit Corner
Mullion
Figure 4
Anchor As s embly
(KV09)
END VIEW
EFCO 2009 Page 6
Page 7
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 7 - Outside 90° Corner Unit Frame Assembly : A. Mullion Subassembly
7. Apply shear blocks (KV11) for the intermediate horizontals to the unit corner mullion with (4) SM00 (1/4" -10 X 3/4 SL-HW-SMS ZC A) at each intermediate
horizontal location.
Top of
Mullion
KV11 Shear
Blocks
KV11 Shear
Block
Unit Corner
Mullion
Figure 5
SMOO Shear
Block Screws
STK3
Alignment
Screw
Figure 6
EFCO 2009 Page 7
Page 8
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 7 - Outside 90° Corner Unit Frame Assembly : A. Mullion Subassembly
8. Once the shear blocks have been attached with SM00 fasteners, adjust the shear blocks so that the face of the horizontal aligns with the face of the corner
mullion. Using a mitered, short piece of horizontal as shown in Figure 7 will aid with alignment. The shear blocks have (4) adjustment slots and (1) fixing
hole for adjustment and to lock them into position (see Figure 10).
9. Lock the shear block in place with (1) STK3 alignment screw (#12-14 X 3/4” HW-SMS 410 TEK 3) at each interme diate horizontal location (see Figure 9).
10. Using an approved solvent or cleaner, clean the sealant contact surfaces of the mullions and shear blocks of all oils and other contaminants.
11. Apply a generous amount of silicone sealant around the front part of the shear block as shown in Figure 11. Apply a generous bead of silicone sealant
around the front part of the intermediate horizontals as shown in Figure 12. Apply sealant to the mitered end only.
Align face
of mullions.
Unit Corner
Mullion
Scrap Piece
of Horizontal
Figure 7
KV11 Shear
Block
KV11 Shear
Block
Unit Corner
Apply
silicone
sealant.
Mullion
Scrap Piece
of Horizontal
STK3
Alignment
Screw
Unit Corner
Mullion
Figure 8 Figure 9
Intermediate
Horizontal
KV11 Shear
Block
Adjustment
Slots
Fixing Hole
Figure 10 Figure 12 Figure 11
Mitered
end of
horizontal.
Apply
silicone
sealant.
EFCO 2009 Page 8
Page 9
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 7 - B. Outside 90° Corner Unit Frame Assembly
12. Insert the horizontal onto the shear block and attach with (7) STD0 (1/4”-10 x 1” PL-FH-SMS 18-8 AB) fasteners per shear block. Note: The number and
locations of fasteners may vary. Remove all excess sealant from areas that will be exposed to the interior. See Figures 13, 14, and 15.
13. Remove excess sealant from gasket reglets and areas where the isolator clips and adapters will later be inserted. See Figure 15.
14. Cap seal the fastener at the face of the horizontals as shown in Figure 16.
KV11 Shear
Block
Figure 14
Intermediate
Horizontal
Remove excess
sealant from
horizontals.
Top of
Mullion
Cap seal
fastener
heads.
Figure 16
KV11 Shear
Blocks
Intermediate
Horizontal
Unit Corner
Mullion
STDO Shear
Figure 15
Block Screws
Figure 13
EFCO 2009 Page 9
Page 10
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 7 - B. Outside 90° Corner Unit Frame Assembly
16. Assemble the mitered 17H1 stack heads using (4) SFQ5 fasteners and a 2” long piece of the 17J5 corner mullion as a welding fixture. Ensure the assembly
is completely square. Take measures to make certain the surrounding exposed finished surfac es are protected from weld spatter.
17. Apply a continuous fillet weld at the miter of the stack heads as shown in Figure 19, and remove the mullion weld fixture after the weld has cooled and set.
18. Assemble the mitered 17H0 stack sills using (4) SFQ5 fasteners and a 2” long piece of the 17J5 corner mullion as a welding fixture.
19. Apply a continuous square groove at the miter of the stack sills as shown in Figure 22, and remove the mullion weld fixture after the weld has cooled and set.
Stack Heads
2” long piece
of corner
mullion used
as welding
fixture.
Stack Sills
SFQ5 Frame
Screws
Figure 17 Figure 18 Figure 19
SFQ5 Frame
Screws
Corner Mullion
Stack Heads
assembled
for welding.
Corner Mullion
Stack Heads
Corner Mullion
Welding Fixture
Corner Mullion
Welding Fixture
Apply a continuous
square groove weld
as shown.
Apply a continuous
square groove weld
as shown.
2” long piece
of corner
mullion used
as welding
fixture.
Stack Sills
assembled
Figure 20 Figure 21 Figure 22
for welding.
Stack Sills
EFCO 2009 Page 10
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 7 - B. Outside 90° Corner Unit Frame Assembly
20. Using an approved solvent or cleaner, clean the sealant contact surfaces of each end of the corner mullions and of the horizontals.
21. Seal the top of the corner mullion as shown in Figure 24 on page 12.
22. Attach the 17H1 stack head assembly and lifting lug to the top of the corner mullion using (10) SFQ5 frame screws as shown below. See Figure 24 on page
12 for more detail.
23. Seal the bottom of the corner mullion as shown in Figure 26 on page 12.
24. Attach the 17H0 stack sill assembly to the bottom of the corner mullion using (10) SFQ5 frame screws as shown below. See Figure 26 on page 12 for more
detail.
FM21 Unit
Lifting Lug
SFQ5 Frame
Screws
Top of
Mullion
Corner Mullion
17H1 Stack
Head Assembly
SFQ5 Frame
Screws
17H0 Stack Sill
Assembly
Figure 23
EFCO 2009 Page 11
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 7 - B. Outside 90° Corner Unit Frame Assembly
25. Once the stack head and sill assemblies have been attached, remove all excess sealant from areas that will be exposed to the interior.
26. Remove excess sealant from gasket reglets and areas where the isolator clips and adapters will later be inserted.
27. Using an approved solvent or cleaner, clean the sealant contact surfaces of the mitered areas of the stack head and sill assemblies.
28. Apply a generous bead of silicone sealant along the miter and at the fastener heads of the stack head and sill assemblies as shown in Figures 25 and 27.
29. Tool the sealant into all voids and reglets to make water tight. Avoid excessive sealant build-up in the stack sill where the units stack together.
FM21 Unit
Lifting Lug
SFQ5 Frame
Screws
Bottom
of Mullion
Butt seal the end of
the corner mullion.
Figure 24
Corner Mullion
Butt seal the end of
the corner mullion.
Top of
Mullion
17H1 Stack
Head Assembly
SFQ5 Frame
Screws
Corner Mullion
Apply a generous bead of
sealant and tool into voids
and reglets. Cap seal fastener
heads where indicated.
Apply a generous bead of
sealant and tool into voids
and reglets. Cap seal fastener
heads where indicated.
17H1 Stack
Head Assembly
Figure 25
17H0 Stack Sill
Assembly
Avoid excessive
sealant build-up
in this area.
17H0 Stack Sill
Assembly
Figure 27 Figure 26
EFCO 2009 Page 12
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 7 - B. Outside 90° Corner Unit Frame Assembly
30. Attach the remaining framing members shown below. Refer to Volume 1 and Volume 2 of the S-8000 Unitized Curtain Wall Assembly Instructions for
assembly detail as noted.
Unit Corner
Mullion
Stack Head
Assembly
Refer to Volume 1, Page 32 - 33
Refer to Volume 1, Page 35 for
Mullion Splice Bar application.
for anchor assembly and
application.
Refer to Volume 1, Page 27- 28
for Frame Pad application.
Figure 28
Intermediate
Horizontals
Refer to Volume 1, Page 26 for
mullion gasket installation.
Refer to Volume 1, Page 34 for
frame assembly.
Refer to Volume 1, Page 29
- 30 “Z” clip installation.
Stack Sill
Assembly
EFCO 2009 Page 13
Page 14
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - Inside 90° Corner Unit Frame Assembly : A. Mullion Subassembly
1. Assemble anchor kits by screwing in the M170 set screw into the bottom of the FM08 mullion anchors until the set screw is flush with the bottom of the
anchor. (Left and Right Hand Assemblies Required)
2. Slide the FM05 or FM06 hook anchor into the FM08 mullion anchor as shown in Figure 1 and 2. See END VIEW on page 15 for part orientation.
3. For the dead load anchor, screw a M169 hex head bolt into the top of the FM08 mullion anchor, half way into the anchor so that 1 3/4” of the bolt extends
from it. See Figure 29 below. For the wind load anchor, screw a M170 socket set screw in the top of the anchor, flush with the top of FM08 as shown in
Figure 30, below.
M169 Hex
TOP
Head Bolt
FM06 Hook
Anchor
FM08 Mullion
Anchor
M170 Socket Set Screw
(Set flush with bottom of FM08)
M170 Socket Set Screw
(Set flush with top of FM08)
FM06 Hook
Anchor
BOTTOM
FM05 Hook
Anchor
FM08 Mullion
Anchor
FM05 Hook
Anchor
DEAD LOAD
ANCHOR
RIGHT HAND
ASSEMBLY
Figure 29
WIND LOAD
ANCHOR
TOP
LEFT HAND
ASSEMBLY
(KV06)
(KV05)
BOTTOM
TOP
LEFT HAND
ASSEMBLY
KV18
RIGHT HAND
FM08 Mullion
Anchor
M170 Socket Set Screw
(Set flush with bottom of FM08)
FM08 Mullion
Anchor
Figure 30
ASSEMBLY
KV17
BOTTOM
EFCO 2009 Page 14
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - Inside 90° Corner Unit Frame Assembly : A. Mullion Subassembly
4. Apply the mullion anchor assemblies to the unit
corner mullions. Insert (3) bolts (3/8”-16 x 4 1/2”
HX-MS 18-8) through the anchors and mullion.
5. Use right and left hand corner anchor assemblies
to orient the top of the anchors and mullion as
shown in Figure 32 and the END VIEW, and insert
the anchor over the bolts.
6. Secure the anchors with (3) 3/8”-16 nylon insert
stop nuts (M172).
Top of
Mullion
3/8”-16 x 4 1/2”
HX-MS 18-8
Anchor As s embly
(KV05)
Figure 31
M172
Anchor As s embly
(KV06)
Unit Corner
Mullion
Top of
Mullion
Anchor As s embly
(KV05)
Unit Corner
Mullion
Figure 32
Anchor As s embly
(KV06)
END VIEW
EFCO 2009 Page 15
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - Inside 90° Corner Unit Frame Assembly : A. Mullion Subassembly
7. Apply shear blocks (KV12) for the intermediate horizontals to the unit corner mullion with (4) SM00 (1/4" -10 X 3/4 SL-HW-SMS ZC A) at each intermediate
horizontal location.
8. Attach a 1” x 1” alum. Angle caulk stop x 1” long to each end of the corner mullion with (1) STK4 fastener (#8-18 x 3/4” PL-FH-SMS 410 TEK 2).
Top of
Mullion
STK4
Top of
Mullion
1” x 1” Alum. Angle x 1”
long attached to corner
mullion with (1) STK4
Figure 34
KV12 Shear
Blocks
Unit Corner
Mullion
Figure 33
STK4
KV12 Shear
Block
1” x 1” Alum. Angle x 1”
long attached to corner
mullion with (1) STK4
SMOO Shear
Block Screws
STK3
Alignment
Screw
Figure 35
Figure 36 Figure 37
Bottom of
Mullion
EFCO 2009 Page 16
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - Inside 90° Corner Unit Frame Assembly : A. Mullion Subassembly
9. Use a short piece of 17E9 adapter to align the horizontal and vertical (see Figure 39). Once the shear blocks have been attached with SM00 fasteners,
adjust the shear blocks so that the face of the horizontal aligns with the face of the 17E9 adapter. Using a mitered scrap piece of hori zontal as shown in
Figure 38 will aid with alignment. The shear blocks have (4) adjustment slots and (1) fixing hole for adjustment and locking them into position (see Figure 41).
10. Lock the shear block in place with (1) STK3 alignment screw (#12-14 X 3/4” HW-SMS 410 TEK 3) at each intermediate horizontal location (see Figure 40).
11. Using an approved solvent or cleaner, clean the sealant contact surfaces of the mullions and shear blocks of all oils and other contaminants.
12. Apply a generous amount of silicone sealant around the front part of the shear block as shown in Figure 42. Apply a generous bead of silicone sealant
around the front part of the intermediate horizontals as shown in Figure 43. Apply sealant to the mitered end only.
Scrap Piece
of Horizontal
Unit Corner
Mullion
KV12 Shear
Block
Figure 38
KV12 Shear
Block
Unit Corner
Mullion
Align face of
mullion and
Scrap Piece
of Horizontal
Figure 39
adapter.
Align face of mullion
and adapter.
Scrap piece of 17E9
adapter used to align
shear block.
Apply
silicone
sealant.
Unit Corner
Mullion
KV12 Shear
Blocks
17E9
Adapter
STK3
Alignment
Screw
Figure 40
Apply
silicone
sealant.
Fixing Hole
Adjustment
Slots
Figure 41 Figure 43 Figure 42
Intermediate
Horizontal
Mitered
end of
horizontal.
EFCO 2009 Page 17
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - B. Inside 90° Corner Unit Frame Assembly
13. Insert the horizontal onto the shear block and attach with (7) STD0 (1/4”-10 x 1” PL-FH-SMS 18-8 AB) fasteners per shear block. Note: The number and
locations of fasteners may vary. See Figures 44, 45, and 46
14. Seal the end of the horizontals where they project above the corner mullion as shown in Figure 47.
15. Remove all excess sealant from areas that will be exposed to the interior. See Figure 47.
16. Remove excess sealant from gasket reglets and areas where the isolator clips and adapters will later be inserted.
17. Cap seal the fastener at the face of the horizontals as shown in Figure 47.
KV12 Shear
Blocks
Top of
Mullion
Intermediate
Horizontal
Intermediate
Horizontal
Figure 45
Figure 46
STDO Shear
Block Screws
Cap seal
fastener
heads.
Remove excess
sealant from
horizontals.
Seal the ends of
horizontals to
the vertical.
Figure 47
KV12 Shear
Block
Unit Corner
Mullion
Figure 44
EFCO 2009 Page 18
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - B. Inside 90° Corner Unit Frame Assembly
18. Assemble the mitered 17H1 stack heads using (4) SFQ5 fasteners and a 2” long piece of the 17J4 corner mullion as a welding fixture. Ensure the assembly
is completely square. Take measures to make certain the surrounding exposed finished surfac es are protected from weld spatter.
19. Apply a continuous fillet weld at the miter of the stack heads as shown in Figure 50, and remove the mullion weld fixture after the weld has cooled and set.
20. Assemble the mitered 17H0 stack sills using (4) SFQ5 fasteners and a 2” long piece of the 17J4 corner mullion as a welding fixture.
21. Apply a continuous fillet weld at the miter of the stack sills as shown in Figure 53, and remove the mullion weld fixture after the weld has cooled and set.
SFQ5 Frame
Screws
Stack Heads
2” long piece
of corner
mullion used
as welding
fixture.
SFQ5 Frame
Screws
Figure 48 Figure 49
Corner Mullion
Corner Mullion
Stack Heads
assembled
for welding.
Corner Mullion
Welding Fixture
Stack Heads
Apply a continuous
square groove weld
as shown.
Figure 50
Corner Mullion
Welding Fixture
Stack Sills
Stack Sills
2” long piece
of corner
mullion used
as welding
fixture.
Stack Sills
assembled
for welding.
Figure 51 Figure 52 Figure 53
Apply a continuous
square groove weld
as shown.
EFCO 2009 Page 19
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - B. Inside 90° Corner Unit Frame Assembly
22. Using an approved solvent or cleaner, clean the sealant contact surfaces of each end of the corner mullions and of the horizontals.
23. Seal the top of the corner mullion as shown in Figure 55 on page 21.
24. Attach the 17H1 stack head assembly and lifting lug to the top of the corner mullion using (10) SFQ5 frame screws as shown below. See Figure 55 on page
21 for more detail.
25. Seal the bottom of the corner mullion as shown in Figure 57 on page 21.
26. Attach the 17H0 stack sill assembly to the bottom of the corner mullion using (10) SFQ5 frame screws as shown below. See Figure 57 on page 21 for more
detail.
17H1 Stack
Head Assembly
FM20 Unit
Lifting Lug
SFQ5 Frame
Screws
Top of
Mullion
Figure 54
Corner Mullion
17H0 Stack Sill
Assembly
SFQ5 Frame
Screws
EFCO 2009 Page 20
Page 21
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - B. Inside 90° Corner Unit Frame Assembly
27. Once the stack head and sill assemblies have been attached, remove all excess sealant from areas that will be exposed to the interior.
28. Remove excess sealant from gasket reglets and areas where the isolator clips and adapters will later be inserted.
29. Using an approved solvent or cleaner, clean the sealant contact surfaces of the mitered areas of the stack head and sill assemblies.
30. Apply a generous bead of silicone sealant along the miter and at the fastener heads of the stack head and sill assemblies as shown in Figures 56 and 58.
31. Tool the sealant into all voids and reglets to make water tight. Avoid excessive sealant build-up in the stack sill where the units stack together.
Cap seal
fastener head
at angle.
Top of
Mullion
Butt seal the end of
the corner mullion and
the top of the angle.
17H0 Stack Sill
Assembly
Corner Mullion
FM20 Unit
Lifting Lug
Figure 55
fastener head
17H1 Stack
Head Assembly
Cap seal
at angle.
SFQ5 Frame
Screws
Corner Mullion
Bottom
of Mullion
Apply a generous bead of
sealant and tool into voids
and reglets. Cap seal fastener
heads where indicated.
17H1 Stack
Head Assembly
Figure 56
17H0 Stack Sill
Assembly
Avoid excessive
sealant build-up
in this area.
Apply a generous bead of
sealant and tool into voids
and reglets. Cap seal fastener
heads where indicated.
Figure 58 Figure 57
SFQ5 Frame
Screws
Butt seal the end of
the corner mullion and
the top of the angle.
EFCO 2009 Page 21
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - B. Inside 90° Corner Unit Frame Assembly
32. Using an approved solvent or cleaner, clean the sealant contact surfaces of the corner mullion and 17E9 adapter.
33. Apply continuous 1/8” diameter beads of sealant in the adapter reglets for the full height of each D.L.O. at the corner mullion. Seal across the corner mullion
at each end of where the adapters will be placed as shown in Figure 59. Butt seal the ends of the adapters with sealant prior to setting them into the opening.
34. Insert the 17E9 adapters into the reglets at the corner mullion and match drill the corner mullion through the holes provided in the adapter. Use a #33 drill
(.113 diameter.)
35. Attach the adapters with SFC7 (#6—18 x 3/8” PL-FH-SMS 18-8 A).
Apply continuous beads
of sealant in the adapter
reglets as shown.
Seal across the corner
mullion at the horizontal
locations at each end of
the adapter as shown.
Intermediate
Horizontal
Figure 59
Apply continuous beads
of sealant in the adapter
reglets as shown.
Sealed ends of
horizontal (see
Figure 47 on page
Unit Corner
Mullion
Insert adapters into the
reglets in the corner
mullion and match drill.
Butt seal each end of
the adapters prior to
setting into opening.
Figure 61
Attach adapters with
SFC7 fasteners.
Figure 60
Figure 62
EFCO 2009 Page 22
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Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - B. Inside 90° Corner Unit Frame Assembly
36. Seal each end of the 17E9 adapters and tool water tight.
37. Cap seal the heads of SFC7.
38. Remove all excess sealant from areas of the frame exposed to view.
17H0 Stack Sill
Assembly
Intermediate
Horizontal
17H1 Stack
Head Assembly
Attach adapters with
SFC7 fasteners.
Insert adapters into the
reglets in the corner
mullion and match drill.
Unit Corner
Mullion
adapters and tool water tight
Butt seal each end of
the adapters prior to
setting into opening.
Seal each end of 17E9
Cap seal
SFC7 heads.
Figure 63
Figure 64
EFCO 2009 Page 23
Page 24
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - B. Inside 90° Corner Unit Frame Assembly
39. Attach the remaining framing members shown below. Refer to Volume 1 and Volume 2 of the S-8000 Unitized Curtain Wall Assembly Instructions for
assembly detail as noted.
Refer to Volume 1, Page 26 for
mullion gasket installation.
Stack Sill
Assembly
Stack Head
Assembly
Unit Corner
Intermediate
Horizontals
Mullion
Refer to Volume 1, Page 27 - 28
for Frame Pad application.
Refer to Volume 1, Page
29 - 30 for “Z” clip installation.
Refer to Volume 1, Page 34 for
frame assembly.
Refer to Volume 1, Page 32 - 33
for anchor assembly and
Refer to Volume 1, Page 35 for
Mullion Splice Bar application.
Figure 65
application.
EFCO 2009 Page 24
Page 25
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 9 - Outside 90° Corner Unit Glazing Preparation : SSG and Captured
1. Thoroughly clean all debris from the shadow box and back panel areas if the project has shadow boxes or back panels.
2. Using an approved solvent or cleaner, clean the surfaces of the mullions to receive the WC18 spacer gasket and sealant of all oils and other
contaminants. The sealant manufacturer’s preparation and application instructions should be followed exactly.
3. If sealant primer is required, apply it per the primer/sealant manufacturer’s instructions. See Figures 68 - 70 of page 26 for more detail.
4. Refer to Volume 2, pages 6 and 7 of the S-8000 Unitized Curtain Wall Assembly Instructions for more information.
Apply the WC18 spacer
gasket to the mullions.
Figure 65
EFCO 2009 Page 25
Page 26
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 9 - Outside 90° Corner Unit Glazing Preparation : SSG and Captured
5. Apply the WC18 spacer gasket to the mullions as shown below and on the previous page. The gaskets will run through as shown below. Butt the gaskets
together at the corners (see Figures 68, 69 and 70). “Crowd” in extra gasket, (approximately 4% to 5% extra) where it runs between the gaskets to ensure a
snug butt joint at the corners. It is important that there are no gaps in the gaskets where they meet in the corners. Note that the gasket is not symmetrical,
and must be installed so that it is flush with the side of the mullions (see Figure 66).
6. A 3/8” backer rod should be applied into the isolator reglet to prevent sealant from getting into the reglet. Remove the backer rod immediately after the
sealant is applied, and before the sealant begins to cure and skin over (See Figure 67).
Apply gaskets
flush with the side
of the mullions.
Figure 65
Figure 66
Butt gaskets at
D.L.O. corners.
Horizontal gaskets
run through.
Insert a 3/8” backer rod into isolator reglets to
Isolator
Reglet
keep free of sealant. Remove the backer rod
immediately, before sealant begins to skin over.
Refer to Volume 2, page 7 for spacer
gasket configuration at the jamb mullions.
Vertical gaskets
run through.
Figure 67
Horizontal gaskets
run through.
HEAD
Figure 68
Butt gaskets at
D.L.O. corners.
Figure 69 Figure 70
Butt gaskets at
D.L.O. corners.
SILL INTERMEDIATE
EFCO 2009 Page 26
Page 27
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 10 - Inside 90° Corner Unit Glazing Preparation : SSG and Captured
1. Thoroughly clean all debris from the shadow box and back panel areas if the project has shadow boxes or back panels.
2. Using an approved solvent or cleaner, clean the surfaces of the mullions to receive the WC18 spacer gasket and sealant of all oils and other
contaminants. The sealant manufacturer’s preparation and application instructions should be followed exactly.
3. If sealant primer is required, apply it per the primer/sealant manufacturer’s instructions. See Figures 72 - 76 on page 28 for more detail.
4. Refer to Volume 2, pages 6 and 7 of the S-8000 Unitized Curtain Wall Assembly Instructions for more information.
Apply the WC18 spacer
gasket to the mullions.
Figure 71
EFCO 2009 Page 27
Page 28
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 10 - Inside 90° Corner Unit Glazing Preparation : SSG and Captured
5. Apply the WC18 spacer gasket to the mullions as shown below and on the previous page. The gasket will run through as shown below. Butt the gaskets
together at the corners (see Figures 68, 69 and 70). “Crowd” in extra gasket, (approximately 4% to 5% extra) where it runs between the gaskets to ensure a
snug butt joint at the corners. It is important that there are no gaps in the gaskets where they meet in the corners. Note that the gasket is not symmetrical,
and must be installed so that it is flush with the side of the mullions (see Figure 66).
6. A 3/8” backer rod should be applied into the isolator reglet to prevent sealant from getting into the reglet. Remove the backer rod immediately after the
sealant is applied, and before the sealant begins to cure and skin over (See Figure 76).
Apply gaskets
flush with the side
of the mullions.
Butt gaskets at
D.L.O. corners.
Figure 65
Figure 72
Horizontal gaskets
run through.
Insert a 3/8” backer rod into isolator reglets to
Isolator
Reglet
keep free of sealant. Remove the backer rod
immediately, before sealant begins to skin over.
Refer to Volume 2, page 7 for spacer
gasket configuration at the jamb mullions.
Horizontal gaskets
run through.
Figure 73
Horizontal gaskets
run through.
Butt gaskets at
D.L.O. corners.
Butt gaskets at
D.L.O. corners.
HEAD
Figure 74
Figure 75 Figure 76
SILL INTERMEDIATE
EFCO 2009 Page 28
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