EFCO 8800 Series Assembly Instructions Vol.2 - Manual (Page 6)

EFCO 2009 Page 6
Series 8700 / 8800 Unitized Curtain Wall Assembly Instructions - Volume 2
1. Using an approved solvent or cleaner, clean the surfaces of the mullions to receive the WC18 spacer gasket and sealant of all oils and other
contaminants. The sealant manufacturer’s preparation and application instructions should be followed exactly.
2. If sealant primer is required, apply it per the primer/sealant manufacturer’s instructions. See the note in Figure 1 below.
3. Frames must be true and square before being structurally glazed. Improperly squared units will cause significant problems during the erection process.
Check the frame for squareness by comparing the difference between the two diagonal measurements of the frame by measuring from corner to opposing
corner for the two diagonal dimensions. The maximum out of square tolerance for a 10’-0” unit frame dimension is a diagonal dimension difference of 1/16”.
If frames are found to exceed this tolerance limit, the frame must be squared using bar clamps. Additionally, individual D.L.O. squareness should be checked
using the procedure above. If bar clamps or other methods are used to square the frame, the device may need to remain on the frame until the sealant is
cured (8 hours minimum).
4. Inspect the I.G. units for the frame. Any excessive sealant or irregularities in the dual seal or glass edge should be cleaned and trimmed. Check for glass
damage, particularly along the glass edges and discard any unacceptable units. At this time, the secondary sealant joints of the insulated glass units should
be checked for proper size. The approved shop drawings will indicate the required secondary sealant joint size on the general information page. Check the
alignment of each pane making up the I.G. unit to ensure they are within acceptable limits. The I.G. unit overall dimensions should be verified for proper size.
Section 4 - Unit Glazing Preparation : SSG and Captured
Note: After cleaning and priming the glazing substrates
(priming when required), the glazing must be set
immediately and the structural silicone applied. The time
between cleaning, priming and applying the structural
silicone should be less than two hours. Otherwise, the
substrates may become contaminated, and the primer will
oxidize. If units have been prepared for glazing at the end
of the day, and sealant has not yet been applied, cleaning
and priming must be redone prior to glazing the next day.
Apply the WC18 spacer
gasket to the mullions.
Figure 1