EFCO 433 Series - Manual (Page 69)

June 2012 PART NO. Y017 Page 69 of 90
Series 433 Triple Set Installation Instructions
SECTION VIII: Installation
(Includes Offset and Center-Set Glazing)
Step 7) Snapping Vertical Mullions Together
To snap vertical mullions together, line up the mullion halves once the 1/4" gap is
achieved between the mullion halves. See Figure 56 on page 64. Place one clamp at
the bottom of the mullions using wood blocks to protect the extrusions. Tighten the
clamp until the mullion halves begin to snap together. Place another set of wood
blocks and a clamp at the middle of the mullions and tighten it. Then repeat the same
process on the top. Tighten the clamps until the mullion halves are pressed together.
The sight line should be 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 59. DO NOT try to hammer the mullion halves together! This will dent,
bend, scratch, or deform the mullions and may cause them to leak. Ensure that the
previous ladder is anchored using the requirements on page 60 before installing the
2nd ladder.
C-CLAMP
OR SIMILAR
WOOD BLOCK
[FIG. 58]
[FIG. 59]
2" REF.
8358
8355
8358/8355 SHOWN,
OTHERS SIMILAR