Install Expansion Mullions Where Required - Ykk ap YES 45 FS Installation Manual

STEP 13 (Continued)

INSTALL EXPANSION MULLIONS WHERE REQUIRED

-Expanion mullions require the K2-2441 weathering gasket in both front and rear reglets.
-During installation , the current air temperature should be taken into account to detemine the
proper spacing between the mullion halves such that the expansion mullion stays within its
allowable width limits during its servie in hot and cold weather conditions.
-Fill the interior gap between the mullion halves with sealant at the sill flashing and head receptor.
See Detail 26.
Female
Expansion
Mullion
Female
Expansion
Mullion
Page-24
FRAME INSTALLATION
3/32" Nominal Gap
Sealant at
Sill Flashing
& Head Receptor
Male
Expansion
Mullion
YES 45 FS
1-3/4"
Detail 26
Nominal
Width
1/8" Nominal Gap
Sealant at
Sill Flashing
& Head Receptor
Male
Expansion
Mullion
YES 45 FI
2"
Nominal
Width
YES 45 FS/FI Storefront System
K2-2441 (Typ.)
1-7/8"
Maximum
Width @ Lowest
Temperature
K2-2441 (Typ.)
2"
Maximum
Width @ Lowest
Temperature
02-4001-09 | Effective Date: May 29, 2018