EFCO Special Purpose Windows Installation - Manual (Page 18)

EFCO CORPORATION 3/5/2014 PART NO. YW40 Page 1 of 10
Window Installation Instructions - Hung Window Installation Section -
General Installation Instructions for Hung Windows
1.
Install the frame plumb, level, and true. It is critical for the window operation that the jambs are
parallel without bow or twist. The sash may be removed while installing the frame at the installer’s
discretion. All sash removed must go back into the same frame from which it was removed. All
sash that are removed should be marked accordingly to avoid confusion.
2.
All hung windows are to be blocked and anchored at jamb midpoints as detailed on the project
shop drawings in order to prevent the jambs from bowing or twisting. The window dimension at
the midpoint shall be within 1/16” of the window dimension at the head and\or sill.
3.
Some hung windows are shipped with temporary spring locks attached at the sash handle rail to
prevent shipping damage. When not required for the project, these locks must be removed before
installing the window into the opening.
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.
Critical
Hold dimension for full
height of window +/- 1/16”
Frame Elevation
Square Critical
Straight edge check,
hold bow to +/- 1/16”
Level
Plumb
Frame