EFCO 8800 Installation Instructions - Manual (Page 48)

EFCO 2009 Page 48
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions
Section 10 - Setting Typical Intermediate Units
17. Once the unit is approximately 1/2” above the engagement leg of the gutter at the stack joint, use clamps to snap the mullions together. Place one clamp at
the center of the mullion at the bottom of the units. Use wood blocks to protect the finished surfaces of the mullions. Tighten the clamp until the mullion halves
begin to snap together. Place another set of wood blocks and a clamp a couple of feet up the unit mullions and tighten it until the mullions snap together.
Repeat this process up the length of the mullion until the mullion halves are snapped together continuously. 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 106.
Figure 106
Figure 105
Clamp mullions
and snap together.
Mate mullions without snapping them
together before setting on the starter
sill, then lower unit to with 1/2” of the
starter sill engagement leg..
Wood block on
both sides of
mullion.