EFCO 5500X Outside Glazed - Manual (Page 38)

EFCO 2012 Page 38
Series 5500 XTherm ™ Curtain Wall Assembly and Installation Instructions
Section 11 - Install Single Span Frame Components
15. Once the first expansion mullion frame is installed as shown on page 37, stack in the other expansion mullion frame, mating the mullions together as shown
below. The mullion clips will snap the mullions together during this process. Use 1/8” shims in the joint at the back of the mullion to set the joint to the nominal
size as required. Blocks of wood used with “C” clamps should be employed to aid in snapping together the mullions. Silicone spray lubricant may be used to
ease mullion assembly, provided the sealant contact surfaces where sealant will later be applied, are not contaminated in this step.
14. Using an approved solvent or cleaner, ensure the joint in the glazing pocket of the verticals are cleaned free of all oils and other contaminants.
15. Apply sealant into the prepared joint, continuously, for the full length of the verticals.
16. Tool the sealant into the joint taking care that the joint is filled and tooled smooth with the face of the glazing pocket as shown. This seal must marry into the
joint plug seals when the joint plugs are later applied.
1/8” shim 1/8” shim
Female Expansion
Mullion
Seal the vertical
joint continuously
with sealant.
Male Expansion
Mullion
Figure 46 Figure 47
Mullion Clip at 48”
o/c max.
(FK34 - 7” system)
(FK35 - 8” system)