EFCO 8750XD - Manual (Page 30)

EFCO 2012 Page 30
Series 8750XD Unitized Curtain Wall Installation Instructions
Figure 63
13. Once the unit is approximately 1/2” above the engagement leg of the starter sill, 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 63.
14. Lower the unit the rest of the way down until it sets hard on the static starter sill.
15. Slide the unit laterally to adjust the mullion width to 3”. This will allow 1/8” for expansion at each mullion.
16. Adjust the free end of the unit for plumb, parallel to the plane of the wall, by sliding the slab anchor forward or backward until the unit is plumb.
17. Rotate the serrated washers where the serrations align with the serrations in the anchor and secure the slab anchor’s anchor bolts.
18. Match drill the slab anchors through the hook anchors on both sides of the unit, and install the pinning screws to lock the frame unit into the final position.
See Figures 64 and 65.
19. Repeat steps 10 through 18 until all units on the static starter sill level have been installed.
20. When erecting a long run of units, check overall frame location dimensions at every fifth unit to avoid dimensional buildup and to ensure that units are
properly positioned with regard to established bench marks.
21. Proceed to “Section 9 - Applying Critical Seals and Stack Gasket”.
Section 7 - Setting Units at Static Starter Sills
Wood block
on both sides
of mullion.
Clamp
mullions
and snap
together.
Figure 64 Figure 65
Once final adjustments have
been made, match drill the
hook anchor and install the
pin screw to lock the lateral
position of the frame unit.
Once the units are set and
final adjustments are made,
turn the washer so that the
serrations align and secure
anchor bolts.