EFCO Special Purpose Windows Installation - Manual (Page 38)

EFCO CORPORATION 3/5/2014 PART NO. YW40 Page 5 of 6
Window Installation Instructions - Panning Installation Section -
Mullion Installation in Panning
1. First complete steps 1 to 9 on Typical Panning Installation pages 1 and 2 of this Section.
2. Refer to the shop drawing for the correct position of the mullions.
3. Set the mullion into the panning frame. Plumb the mullion to the opening. Fasten the mullion to the
opening by use of two EFCO supplied mullion anchor clips (KA20). Locate one mullion anchor at
the masonry head and one at the masonry sill. Attach the anchors to the opening with erector
furnished fasteners, then attach the mullion to the clips with EFCO furnished fasteners.
4. Now follow steps 11 to 14 of the Typical Panning Installation page 2 of this Section.
5. Attach the mullion pressure clips to the mullion as close to the top end as possible, and then 16” on
center with EFCO supplied fasteners. Spacing may need to be reduced depending on design
pressure and anchorage conditions. Refer to the approved shop drawings or consult the project
design professional.
6. Attach the mullion clip to each window jamb with EFCO supplied fasteners. Make sure that the
window jamb remains square and plumb. The drilling of the window jambs is Not by EFCO.
7. Field cut the vertical mullion cover to fit between the horizontal trim covers and snap over the
mullion clips.
Completely read the General Installation Instructions and all other sections which pertain
to your project before starting work. These recommendations are for general erection
procedures only. For actual job conditions, see the details on the shop drawings. For
perimeter anchor types and spacing, refer to the approved shop drawings or consult the
project design professional.
Clip screw by EFCO
(see step 6)
Back bed the window to
mullion contact area with
silicone sealant before
installing the window, or
cap seal after the window
is installed.
Distance varies, refer
to shop drawings.
Mullion anchors
Mullion cover
Typical
Mullion clip
as fabricated
by EFCO