EFCO 406X Series - Manual (Page 20)

Series 406X Storefront Installation Instructions
EFCO 2014 Page 20
Section 4C. Installation
5. Installing additional Frame Ladders - Make sure that the head and jamb have been shimmed and anchors have
been installed on the previous frame ladder. Apply sealant to the sill flashing as sown in Fig. #21(a) on page 19.
Place the additional ladder onto the sill flashing at approximately 1/4” from previously installed frame ladder and
follow steps 2 and 3 from page 19.
 On screw spline construction make sure ladders snap together when pushed together.
 On shear block construction make sure ladders are together and all shear block screws are installed.
6. Snapping Mullions Together - To snap the mullions together of two ladders, line up the mullion halves as shown in
Fig. #23(a) below. Place one clamp at the sill end of the mullion using wood blocks to protect the extrusions.
Tighten the C-clamp until snap begins to engage. Place additional C-clamps at mid-span and head of mullion.
Tighten all clamps until sightline as shown in Fig. #23(b & c) below is achieved. It may be necessary to move
clamps to ensure even engagement of snap. DO NOT try to hammer the mullion together as this will dent, bend,
scratch, or deform the mullion and may cause it to leak. After correctly snapping mullion together continue to install
ladder per step 3 on page 19.
7. Perimeter Seal - After all units are installed
into the opening and anchored, begin
sealing process. Apply a generous amount
of silicone type sealant to the gap between
the frame and rough opening. Tool off all
excess sealant to ensure a proper seal and
to achieve an appropriate appearance.
(a) (b)
C-clamp or similar
Wood Block
5G51 / 21V3 21U9 / 21V0
Sealant Sealant
(c)
Fig. #23
Fig. #24