EFCO WV410 User Manual
Page 13
EFCO CORPORATION 2/2014 PART NO. Y007
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WV410 WINDOW - INSTALLATION INSTRUCTIONS
Section VIII – Window Installation
B. Dual Window Installation
The procedure for installing the vertical mullion in a dual window application differs from the
ribbon run application. In a dual window application, the WV410 frame side clearances are ample
enough to install the windows after the vertical mullion. In a dual window application the mullion
is always installed first.
Step 1
Establish the mullion center lines in the opening per the approved shop drawings. Refer to the
elevation in Figure 13 to locate the mullion center.
Step 2
Cut the vertical mullion halves 1F10/9837 to the daylight opening height and prep the ends as
detailed in Figure 14 below.
* Drawings on this page are not to scale.