02-4001-09 | Effective Date: May 29, 2018
Page-24
YES 45 FS/FI Storefront System
FRAME INSTALLATION
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.
3/32” Nominal Gap
Sealant at
Sill Flashing
& Head Receptor
1/8” Nominal Gap
Sealant at
Sill Flashing
& Head Receptor
Male
Expansion
Mullion
Female
Expansion
Mullion
Male
Expansion
Mullion
Female
Expansion
Mullion
1-3/4”
Nominal
Width
1-7/8”
K2-2441 (Typ.)
YES 45 FS
YES 45 FI
K2-2441 (Typ.)
Maximum
Width @ Lowest
Temperature
2”
Nominal
Width
2”
Maximum
Width @ Lowest
Temperature
Detail 26
Summary of Contents for YES 45 FS
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