EFCO WV410 User Manual
Page 16
EFCO CORPORATION 2/2014 PART NO. Y007
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WV410 WINDOW - INSTALLATION INSTRUCTIONS
Section VIII – Window Installation
C. Ribbon Window Installation
The legs of the window engage the tracks of the vertical mullions, allowing a positive location
situation for the windows. The ribbon run installation is the same as the dual window installation
where the first mullion is installed prior to the WV410 frames. After the first mullion is installed,
the remaining window and mullions will be sequentially stacked. See Figure 18.
The mullion center lines must be laid out before the first window can be installed. Take into
account the 3/16” shim at the extreme jambs and the leg engagement at the vertical mullion.
The vertical mullion is designed to be set flush with the interior side of the storefront frame. This
is necessary to position the vent glass in the same plane as the storefront glass.
* Drawings on this page are not to scale.
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