Unitized Curtain Wall System

YCU 750 TU Unitized Curtain Wall System
ASSEMBLY INSTRUCTIONS
Assembly Manual
2009 YKK AP America Inc. is a subsidiary of
YKK Corporation of America.
TABLE OF CONTENTS
Installation Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page ii
PARTS DESCRIPTION
YCU 750 TU Framing Members . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1
YCU 750 TU Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 to 4
FRAME ASSEMBLY
Attach Verticals Mullions to Horizontals Mullions . . . . . . . . . . . . . . . .
Outside Corner Mullion Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside Corner Mullion Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Apply Sealant to Frame Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Mullion Clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Mullion Splice Sleeves and Leveling Brackets . . . . . . . . . . . . .
Install Setting Block Chairs and Setting Blocks . . . . . . . . . . . . . . . . .
Install Gaskets to Vertical Mullions . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Jamb Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page 5 & 6
Page 7
Page 8
Page 9
Page 10
Page 11
Page 12
Page 13 & 14
Page 15
GLAZING
Install Glazing Adaptors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Interior Glazing Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Insert Side Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Apply Sealant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attach Stacking Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Apply Sealant to Frame Connections . . . . . . . . . . . . . . . . . . . . . . . . .
Install Glass Stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Exterior Glazing Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page 16
Page 17
Page 18
Page 19 & 20
Page 21
Page 22 & 23
Page 24
Page 25
Page 26
FRAME ASSEMBLY
Install Stacking Tray Gasket and Spacer . . . . . . . . . . . . . . . . . . . . . .
Install End Dam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install End Caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Horizontal Thermal Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assemble Sill Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page 27 & 28
Page 29
Page 30
Page 31
Page 32 & 33
Effective Date: November 11, 2009 | 04-4012-00
Page-i
Installation Notes
1. Do not drop, roll or drag boxes of aluminum framing. Move and stack boxes with proper support
to prevent distortion. If fork lifts are used, be especially careful about striking the boxes when lifting
or moving.
2. Store in a dry, out of the way area. If rain exposure, condensation or any water contact is likely,
then all packaging material should be removed. Wet packaging materials will discolor and may stain
aluminum finishes and paints.
3. All materials should be checked for quality and quantity upon receipt, YKK AP must be notified
immediately of any discrepancies in shipment. Check to make sure that you have the required shims,
sealants, supplies and tools necessary for the installation.
4. Carefully check the openings and surrounding conditions that will receive your material.
Remember, if the construction is not per the construction documents, it is your responsibility to notify
the general contractor in writing. Any discrepancies must be brought to the general contractor's
attention before you proceed with the installation.
5. Gather your shop drawings, materials, packing list, and this installation manual. Carefully review
parts location, the sequence it goes therein, when you glaze it and how you seal it. Installation
instructions are of a general nature and may not cover every condition you will encounter. The shop
drawings and/or installation manuals were prepared specifically for the product.
6. Any material substitutions must be of equal or greater quality.
7. Make certain that material samples have been sent for compatibility testing for all manufacturer's
sealants involved. Make certain sealants have been installed in strict accordance with the
manufacturer's recommendations and specifications.
8. Remember to isolate, in an approved manner, all aluminum from uncured masonry or other
incompatible materials.
9. System-to-structure fasteners are not supplied by YKK AP. Fasteners called out on shop drawings
are to indicate minimum sizes for design loading.
10. If any questions arise concerning YKK AP products or their installation, contact YKK AP for
clarification before proceeding.
11. YKK AP storefront and/or curtain wall framing is typically completed before drywall, flooring and
other products which may still be in process. Take the extra time to wrap and protect the work that
you have proudly produced, because no one else will.
12. Cutting tolerances are plus zero, minus one thirty second unless otherwise noted.
13. Check our website, www.ykkap.com, for the latest installation manual update prior to
commencing work.
Page-ii
04-4012-00 | Effective Date: November 11, 2009

FRAMING MEMBERS
Intermediate
Horizontal
Head
BE9-3806
E9-3803
Inside Corner Mullion

Male

Female
E9-3817
E9-3818
BE9-3804
Glass Stop
E9-3807
BE9-3801
Head Glass Stop
E9-3808
BE9-3802
Horizontal Glass Stop
E9-3809
Heavy Duty
Sill Starter
BE9-3834
Male Mullion Adaptor
E9-3819
Sill
BE9-3805
Inside Corner Adaptor
BE9-3820
Jamb
BE9-3810
Inside Corner
Glazing Adaptor
E9-3821
BE9-3811
Outside Corner
Glass Stop
E9-3816
Stacking Tray
Vertical Mullion
Male
Vertical Mullion
Female
Jamb Trim
Use with BE9-3810
Jamb Interior Cover
Outside Corner Mullion

Male

Female
E9-3812
Outside Corner Adaptor
BE9-3815
E9-3813
E9-3814
Page-1

ACCESSORIES
Page-2
Mullion Clip
E1-3901
Jamb
End Dam
E1-3913
Setting Block Chair
E1-3902
Mullion Splice Sleeve

For Left Outside Corner
Mullion
E1-3914

Left
E1-3903

For Right Outside
Corner Mullion
E1-3915

Right
E1-3904
Outside Corner
Leveling Bracket
E1-3916
Leveling Bracket
E1-3905
L Anchor
For Outside Corner
E1-3917
Bracket Sleeve
E1-3906
Mullion End Cap

For Outside Corner
E1-3918
L Anchor
E1-3907
Inside Corner
Leveling Bracket
E1-3919
Lock Washer
E1-3908
Reinforcement Adaptor
E1-3920
Stopper
E1-3909
Reinforcement Adaptor
For Outside Corner
E1-3921
Mullion End Cap
E1-3910
Slab Edge Anchor
E1-3922
Mullion End Cap

For Inside Corner
E1-3911
Slab Edge
Anchor Spacer
E1-3923
Mullion End Cap

For Jamb
E1-3912
Heavy Duty Sill Starter

Reinforcement Clip
E1-3924

ACCESSORIES
Top Unit Lift Bracket
For Left Mullion
E1-3925
Side Block
EPDM
E2-3903

For Right Mullion
E1-3926
Side Block
Silicone
E2-3913

For Left
E1-3927
Side Block
EPDM
E2-3914

For Right
E1-3928
Side Block
Silicone
E2-3915
Vertical Air Tight

Gasket
E2-3901
Setting Block
EPDM
E2-3907
Vertical Thermal
Gasket
E2-3902
Setting Block
Silicone
E2-3917
Exterior Gasket
E2-3904
Side Block for 1/4

Glass at Inside Corner
E2-9907
Stacking Tray Gasket
E2-3905
Silicone Splice Sleeve
E2-0070
Stacking Tray Spacer
E2-3906
For Attachment of Stacking

Tray to Head E9-3803
Interior Gasket for

E2-3910
For Attachment of Mullion

Splice Sleeve and Leveling
Bracket to Vertical
Horizontal Thermal
Gasket
E2-3911
Interior Gasket
E2-3912
#12 x 1" FHSMS

FS-1216-SS
3/8" x 2 1/4" HWHMS
#12 x 1 1/4" HWHS

For Frame Assembly
#10 x 5/8" PHSMS

For End Cap Attachment
HM-3836
HC-1220-SS
PC-1010-SS
Page-3

ACCESSORIES
#10 x 3/4" TEKPHS
For Attachment of Corner
Adaptor Assembly
PS-1012SS
#10 x 1" TEKPHS

For Inside Corner Adaptor
Assembly
PS-1216SS
3/8" Lock Washer

#12 x 1 1/4" HWHS
For Frame Assembly
#12 x 1 3/4" HWHS

For Corner Mullion Assembly
HC-1220SS

Bracket to Vertical
HC-1228SS
For Anchor Attachment
HM-3800
1/2" x 2 1/2" HWHMS
3/8" - 13 Nut HHMS
WS-3800
HM-5000
3/8" - 16 Nut HHMS

Bracket to Vertical
1/2"-13 x 1/2" Set Screw

For Leveling Bracket
Page-4
YM-5008
1/2" Lock Washer

HM-5040
WS-5000

FRAME ASSEMBLY
STEP 1
ATTACH VERTICAL MULLIONS TO HORIZONTAL MULLIONS
-Apply medium modulus silicone sealant to each end of the horizontal members prior to attaching
to the vertical members.
-Wipe away excess sealant from area indicated in BE9-3805.
See Detail 1.
Sealant
Sealant
Detail 1
E9-3803
Sealant
BE9-3806
BE9-3805
-Assemble horizontal members using #12 screws.

HC-1220-SS for Typical Mullion.
HC-1228-SS for Corner Mullion.
-Torque to 50 inch-pounds.
Wipe Excess Sealant
Detail 2
See Detail 2.
HC-1220-SS
Page-5

FRAME ASSEMBLY
STEP 2
APPLY SEALANT TO SCREW HEADS ON VERTICAL MULLION
-Apply and tool medium modulus silicone sealant to screw heads at areas shown in Detail 3.
Sealant
Sealant
Sealant
Detail 3
Page-6

CORNER FRAME ASSEMBLY
STEP 3
OUTSIDE CORNER MULLION ASSEMBLY
-Attach the outside corner adaptor, BE9-3815, to outside corner mullions E9-3813 and E9-3814
using PS-1012-SS screws.
See Detail 4.
BE9-3815
E9-3814
E9-3813 (Male) Shown,
E9-3814 (Female) Similar
Detail 4
PS-1012-SS
-Attach the inside corner adaptor,

BE9-3820, to inside corner mullions
E9-3817 and E9-3818 with PS-1012-SS scews.
See Detail 5.
PS-1012-SS
BE9-3820
E9-3818
E9-3817 (Male) Shown,
E9-3818 (Female) Similar
Detail 5
Page-7

STEP 4
INSIDE CORNER MULLION ASSEMBLY
-Apply a medium modulus silicone sealant continuously to the groove on the inside corner male
mullion, E9-3817, prior to attaching the male mullion adaptor E9-3819 as shown in Detail 6.
E9-3817
Continuous
Sealant
Detail 6
BE9-3820
-Install the male mullion adaptor, E9-3819, using PS-1216-SS screws.

-PS-1216-SS screw should be located 1-1/2 for each end, and 12 on center thereafter.
-Wipe away excess sealant as shown in Detail 7.
-Apply a medium modulus silicone sealant to each screw point location.
See Detail 7.
E9-3817
Sealant
Wipe Away
Excess Sealant
E9-3819
PS-1216-SS
Page-8
Detail 7

FRAME ASSEMBLY
STEP 5
APPLY SEALANT TO FRAME JOINTS
-Apply and tool a medium modulus silicone sealant to areas indicated in Detail 8.
E9-3803
Apply and
Tool Sealant
Apply and
Tool Sealant
BE9-3806
Apply and
Tool Sealant
Apply and
Tool Sealant
BE9-3805
Apply and
Tool Sealant
Apply and
Tool Sealant
Detail 8
Front View
Page-9

FRAME ASSEMBLY
STEP 6
SLIDE MULLION CLIPS INTO FEMALE MULLION
-Reference shop drawings for correct spacing, quantity, and location of mullion clip E1-3901.
See Detail 9.
-Crimp the leg of the female mullion
above and below each mullion clip to
prevent the mullion clip from sliding out
of place.
See Detail 10.
Crimp This Leg

E1-3901
E1-3901
Crimp This Leg
Detail 9
Slide in From
Bottom
Detail 10
Page-10

FRAME ASSEMBLY
STEP 7
INSTALL MULLION SPLICE SLEEVES AND LEVELING BRACKETS
-Install the mullion splice sleeves and leveling brackets using two (2) HM-3800 nuts, four (4)
WS-3800 washers, and two (2) HM-3836 bolts as shown in Detail 11.
-Location A for typical conditions.
-Location B for cantilever locations, refer to shop drawings.
Mullion Splice
Sleeves
Mullion Splice
Sleeve
WS-3800
HM-3836
HM-3800
Leveling
Brackets
A
Left Mullion
B
Leveling
Bracket
Right Mullion
Detail 11
Mullion Splice Sleeve and Leveling Bracket Chart

Typical
Mullion
Outside Corner
Mullion
Inside Corner
Mullion
LEFT
RIGHT
LEFT
RIGHT
LEFT
RIGHT
TYPICAL FLOOR
Mullion Splice
Leveling Bracket
E1-3903
E1-3905
E1-3904
E1-3914
E1-3916
E1-3915
E1-3903
E1-3919
E1-3904
TOP FLOOR
Lift Bracket
Leveling Bracket
E1-3925
E1-3905
E1-3926
E1-3927
E1-3916
E1-3928
E1-3925
E1-3919
E1-3926
Page-11

FRAME ASSEMBLY
STEP 8
INSTALL SETTING BLOCK CHAIRS AND SETTING BLOCKS
-Install the setting block chair, E1-3902 at 1/4 points as shown in Detail 12.
-Crimp the area indicated on both sides of the setting block chair shown in Detail 13.
-Apply a small amount of medium modulus silicone sealant to the topside of the setting block
chair as shown in Detail 13.
-Adhere setting block E2-3907 to the topside of the setting block chair as shown in Detail 14.
Setting Block Chair

E1-3902
Setting Block
Chair
Detail 12
Crimp
Setting Block
Chair
Sealant
Detail 13
Setting Block
E2-3907
Detail 14
Page-12

FRAME ASSEMBLY
STEP 9
INSTALL VERTICAL MULLION GASKETS
-Attach thermal barrier gasket, E2-3902, to BE9-3801
as shown in Detail 15.
-Slide in airtight gasket, E2-3901 to BE9-3802 as BE9-3801
shown in Detail 16.
BE9-3802
E2-3901
E2-3902
Detail 16
Detail 15
-To hold the airtight gasket, E2-3901 in

place, crimp the area indicated on the
female vertical mullion, BE9-3802 as
shown in Detail 17.
Airtight
Gasket
BE9-3802
Crimp
Detail 17
Page-13

STEP 10
INSTALL VERTICAL MULLION GASKETS
-Install gaskets as shown in Detail 18 using the same technique as Step 9.
*NOTE: E2-3902 must be installed to the outside corner mullion glass stop E9-3816 After glazing.
E2-3902
Install After
Glazing
Outside
Corner
E9-3816
E2-3901
E9-3814
Detail 18
E9-3817
E9-3818
E2-3901
Inside
Corner
E2-3902
Page-14

FRAME ASSEMBLY
BE9-3810
STEP 11
INSTALL JAMB GASKETS
-Slide in airtight gasket, E2-3901 to BE9-3810 as
shown in Detail 19.
-Crimp the area indicated on the

jamb, BE9-3810 as shown in Detail 20.
E2-3901
Detail 19
-Attach jamb trim, BE9-3811 to jamb BE9-3810 using

PS-1012-SS screws as shown in Detail 21. Locations
indicated on fabrication drawings.
-At the bottom of the jamb assembly, apply a medium

modulus silicone sealant to the end of the airtight gasket
and run a bead of medium modulus silicone sealant 8
up the seam between the jamb and jamb trim as shown
in Detail 22.
Crimp
Detail 20
BE9-3810
BE9-3811
Sealant
Detail 21
PS-1012-SS
Detail 22
Page-15

GLAZING
STEP 12
INSTALL GLAZING ADAPTORS AS REQUIRED
-Apply medium modulus silicone sealant continuously along gasket reglet as shown in Detail 23.
-Vertical adaptors snap in first, and run through.
-Snap in horizontal adaptors between vertical adaptors.
Apply Sealant
Along Gasket
Reglet
Apply Sealant
Along Gasket
Reglet
Detail 23
Page-16
Apply Sealant
Along Gasket
Reglet

GLAZING
STEP 13
INSTALL GLAZING GASKETS
-Cut interior glazing gaskets to size:
Vertical Gasket = Daylight Opening + 1.
Horizontal Gasket = Daylight Opening + 1/4 per each foot of opening width.
-Install vertical gaskets first, centered along the daylight opening. Notch the lip at both ends of the
vertical gasket as shown in Detail 24.
-Install horizontal glazing gaskets next.
-Insert the glazing gasket into the reglet at each end first.
-Press the rest of the glazing gasket into the reglet starting at the center and work towards each end.
-Pull the last 3 of each gasket away from the reglet.
-With gasket end held out of the way, run a 3 bead of sealant into the reglet at the ends as
shown in Detail 25.
-Apply a medium modulus silicone sealant at the ends of the horizontal gaskets as shown in
Detail 26.
-Reinsert the ends of the gaskets pressing them firmly against the face of the mullions.
-Apply and tool sealant at the intersection of the vertical and horizontal gaskets as
shown in Detail 27.
1/2
1/2
Sealant
Detail 26
1/2
1/2
Detail 24
1/2
Detail 27
3
1/2
Detail 25
Tool Sealant
Flat
Page-17

GLAZING
STEP 14
INSTALL THE GLASS
-Install the glass as shown in Detail 28.
Head
Vertical
Sill
Detail 28
Head
Intermediate
Horizontal
Verticals
Sill
Page-18

GLAZING
STEP 15
INSERT SIDE BLOCKS
-Insert E2-3903 side blocks at 1/4 points of the daylight opening.
-To ensure a tight fit between the glass and side block, the addition of side block E2-3914 may be
used.
See Detail 29.
Vertical Mullion
Side Blocks
Side Blocks
E2-3903
Detail 29
E2-3914
Page-19

GLAZING
STEP 15 Continued
INSERT SIDE BLOCKS
-Insert
-Insert
-Insert
of the
E2-3903 side blocks at 1/4 points of the D.L.O. to jamb mullion BE9-3810.
E2-3903 side blocks at 1/4 points of the D.L.O. to outside corner mullion E9-3814.
E2-3903 side blocks for 1 glazing, and E2-9907 side blocks for 1/4 glazing at 1/4 points
D.L.O. to inside corner mullion E9-3817.
See Detail 30.
Outside
Corner Mullion
Jamb Mullion
E2-3903
E2-3903
Detail 30
Inside
Corner Mullion
1/4 Glazing
Inside
Corner Mullion
E9-3821
E2-3903
Page-20
E2-9907

GLAZING
STEP 16
APPLY SEALANT
-Apply a medium modulus silicone sealant to the edge of the glass and mullions at the head and
intermediate horizontal locations as shown in Detail 31.
Head
Intermediate
Horizontal
Detail 31
Page-21

GLAZING
STEP 17
ATTACH STACKING TRAY
-Apply a medium modulus silicone sealant continuously to the top edge of the vertical mullions
prior to head attachment.
See Detail 32.
-Attach head using FS-1216-SS screws.
See Detail 33.
Sealant
Sealant
BE9-3801
BE9-3802
Detail 32
FS-1216-SS
BE9-3804
Detail 33
E9-3803
Continuous
Sealant
Page-22

GLAZING
STEP 17 Continued
ATTACH STACKING TRAY
-Wipe away excess sealant at areas indicated in Detail 34 for glass stop installation.
Sealant
Sealant
Remove
Sealant
Remove
Sealant
Detail 34
-Seal all screw heads with a medium

modulus silicone sealant as shown in
Detail 35.
Sealant
Detail 35
Page-23

GLAZING
STEP 18
APPLY SEALANT TO THE FRAME CONNECTIONS
-The spaces at the ends of the head attachment and verticals need to be sealed with a
medium modulus silicone sealant as shown in Detail 36.
Sealant
Detail 36
Page-24

GLAZING
STEP 19
INSTALL GLASS STOPS
-Install glass stops. Use a piece of gasket E2-3904 temporarily to hold glass stop in place.
See Detail 37.
Glass Stop
E2-3904
Head
Glass Stop
E2-3904
Intermediate
Horizontal
Detail 37
Sill
Page-25

GLAZING
STEP 20
INSTALL EXTERIOR GLAZING GASKETS
-Cut exterior vertical glazing gaskets, E2-3904 to the same length as the daylight opening plus
1/4 per foot of daylight opening height.
-Cut exterior horizontal glazing gaskets, E2-3904 to the same length as the daylight opening plus
1/4 per foot of daylight opening width.
Caution: Do not stretch the gaskets.
E2-3904
Daylight opening
Daylight opening
See Detail 38.
Detail 38
Daylight opening
Page-26

FRAME ASSEMBLY
STEP 21
INSTALL STACKING TRAY GASKET AND SPACER
Sealant
-To hold the gaskets in place, apply a small amount

of medium modulus silicone sealant to the stacking
tray gasket reglet and the stacking tray spacer reglet.
See Details 39 & 40.
Detail 39
Sealant
Detail 40
Page-27

FRAME ASSEMBLY
STEP 21 Continued
INSTALL STACKING TRAY GASKET AND SPACER
-For typical conditions, cut the stacking tray gasket
E2-3905 to the stacking tray length plus 1/2.
-For jamb conditions, cut the stacking tray gasket
E2-3905 to the stacking tray length plus 1/4.
-Cut stacking tray spacer E2-3906 to the stacking
tray length.
-For typical conditions, install stacking tray gasket
E2-3905 to the stacking tray leaving 1/4 protruding off
each end of the stacking tray as shown in Detail 41.
-For jamb conditions, install stacking tray gasket
E2-3905 to the stacking tray leaving 1/4 protruding
off the non-jamb end of the stacking tray as shown
in Detail 42.
-Install stacking tray spacer E2-3906 flush with the
ends of the stacking tray.
1/4
Sealant
E2-3905
E2-3906
1/4
E2-3905
(Only)
Typical Condition
Detail 41
1/4
Sealant
E2-3905
(Only)
Jamb Condition
Detail 42
Page-28

FRAME ASSEMBLY
STEP 22
SEAL AND ATTACH END DAM TO THE STACKING TRAY AT PERIMETER END JAM
Note: Apply medium modulus silicone sealant to the profile of the stacking tray. Attach the end
dam to the stacking tray, and tool sealant.
-Use two (2) HC-1220-SS screws to
fasten E1-3913 end dam to BE9-3804
stacking tray.
See Detail 43.
E1-3913
Sealant
HC-1220-SS
BE9-3810
Detail 43
Page-29

FRAME ASSEMBLY
STEP 23
ATTACH MULLION END CAPS
-Attach mullion end caps using PC-1010-SS screws.
See Detail 44.
BE9-3810
BE9-3801
E1-3910
E1-3912
Typical
Mullion
Jamb
E9-3817
E9-3814
E1-3911
E1-3918
Outside
Corner
Page-30
Detail 44
Inside
Corner

FRAME ASSEMBLY
STEP 24
INSTALL HORIZONTAL THERMAL GASKET
-Cut and Notch horizontal thermal gasket E2-3911, per condition, as shown in Detail 45.
Detail 45
E2-3911
Sill
E2-3911
1-1/4
E2-3911
Notch at Typical
Male and Female Vertical Mullion
2-1/2
E2-3911
Notch at Jamb
1-1/2
E2-3911
2-1/2
Notch at
Outside Corner
E2-3911
Notch at
Inside Corner
Page-31

FRAME ASSEMBLY
STEP 25
ASSEMBLE SILL STARTER
-Sill starter reinforcement clip E1-3924 must be placed at all vertical mullion locations.
See Detail 46.
Note: If the vertical mullion is located directly on top of the sill starter splice, then two reinforcement clips must be used located 1/2 of each side of splice joint.
E1-3924
E1-3924
1/2
E1-3924
E1-3924
1/2
E1-3924
Inside
Corner
Typical
Condition
Detail 46
BE9-3834
E1-3924
E1-3924
Jamb
Page-32
Outside
Corner

FRAME ASSEMBLY
STEP 25 Continued
ASSEMBLE SILL STARTER
-Slide in sill starter reinforcement clip E1-3924 from the end of sill starter BE9-3834.
See Detail 47.
-Tape the reinforcement
clip to the sill starter to
hold in place.
E1-3924
See Detail 48.

Cut
Len
gth
Detail 47
BE9-3834
1/2
Tape
Detail 48
Page-33
YKK AP America Inc.

7680 The Bluffs
Suite 100
Austell, Georgia 30168
www.ykkap.com

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YCU 750 TU Unitized Curtain Wall System

YKK Corporation of America.

YCU 750 TU Unitized Curtain Wall System

Effective Date: November 11, 2009 | 04-4012-00

YCU 750 TU Unitized Curtain Wall System

04-4012-00 | Effective Date: November 11, 2009

YCU 750 TU Unitized Curtain Wall System

Inside Corner Mullion

Inside Corner Mullion

Head Glass Stop

Horizontal Glass Stop

Male Mullion Adaptor

Inside Corner Adaptor

Jamb Interior Cover

Outside Corner Mullion

Outside Corner Mullion

Effective Date: November 11, 2009 | 04-4012-00

Outside Corner Adaptor

YCU 750 TU Unitized Curtain Wall System

Setting Block Chair

Mullion Splice Sleeve

Mullion Splice Sleeve

Mullion Splice Sleeve

Mullion Splice Sleeve

Mullion End Cap

Mullion End Cap

Slab Edge Anchor

Mullion End Cap

Mullion End Cap

Heavy Duty Sill Starter

04-4012-00 | Effective Date: November 11, 2009

YCU 750 TU Unitized Curtain Wall System

Top Unit Lift Bracket

Top Unit Lift Bracket

Top Unit Lift Bracket

Vertical Air Tight

Side Block for 1/4

Stacking Tray Gasket

Silicone Splice Sleeve

Stacking Tray Spacer

For Attachment of Stacking

Interior Gasket for

For Attachment of Mullion

#12 x 1" FHSMS

3/8" x 2 1/4" HWHMS

Effective Date: November 11, 2009 | 04-4012-00

#12 x 1 1/4" HWHS

#10 x 5/8" PHSMS

YCU 750 TU Unitized Curtain Wall System

#10 x 1" TEKPHS

3/8" Lock Washer

#12 x 1 3/4" HWHS

For Attachment of Mullion

For Anchor Attachment

1/2" x 2 1/2" HWHMS

3/8" - 13 Nut HHMS

3/8" - 16 Nut HHMS

1/2"-13 x 1/2" Set Screw

For Anchor Attachment

1/2" Lock Washer