EFCO 433 Series - Manual (Page 71)

June 2012 PART NO. Y017 Page 71 of 90
Series 433 Triple Set Installation Instructions
SECTION VIII: Installation
(Includes Offset and Center-Set Glazing)
Step 9) Snapping the Expansion Mullion (Center-Set Mullion)
To snap the expansion mullion together, line up the mullion halves and gaskets. See
Figure 62. Place one clamp at the bottom of the expansion mullion using wood blocks
to protect the extrusions. Tighten the C-clamp until the expansion mullion halves begin
to snap together. Place another set of wood blocks and a C-clamp at the middle of the
expansion mullion and tighten it. Then repeat the same process on the top. Tighten
the C-clamps until the sight line becomes 2". It may be necessary to work from one
clamp to the next several times, or move the clamps, to ensure the mullions are
snapped together evenly. See Figure 63. DO NOT try to hammer the expansion
mullion together! This will dent, bend, scratch, or deform the expansion mullion and
may cause it to leak. Anchor the head using the requirements shown on page 64
before installing the next ladder. If this is the last ladder, anchor the jambs as required
on page 65 and proceed to the perimeter sealing process, Step 11 on page 72.
[FIG. 62]
8397 8396
2.000"
8396 8397
WOOD BLOCK
C-CLAMP
OR SIMILAR
[FIG. 63]