Screw spline fabrication, Shear block fabrication, Step 2) step 3) step 4) – EFCO 960 Series User Manual
Page 20: Step 1)

PAGE 18
NOTE: Door jambs run to the floor and are cut longer than other verticals.
NOTE: Allow extra clearances, if necessary, to accommodate building
NOTE: Verticals must run through. If the opening has an entrance,
STEP 2)
STEP 3)
STEP 4)
see the appropriate frame and door fabrication and
Cut the verticals and vertical face caps to the frame size.
Drill holes for the assembly screws on the vertical members.
See the drilling template on page 19 or the drill jig guide on
Cut the horizontal members to the day lite openings (between the
Cut the horizontal face caps to day lite openings minus 1/16".
page 20.
vertical mullions).
(D.L.O. - 1/16")
installation sheets.
tolerances.
The screw spline system is a fabrication and erection method that permits
the preassembly of single units in the shop or at the job site. These
units are then erected by mating the male mullion with the female mullion
counterparts.
When an entrance is required, shear block joinery must be used to attach
the side lite horizontals to the immediate door frame. The other side of
NOTE: Allow a minimum 1/
2
" shim and caulk space around the perimeter.
the side lite will be fabricated for screw spline joinery as usual.
STEP 1)
Measure the opening to determine the cut length of the frame
components.
SECTION III - SCREW SPLINE FABRICATION
MDM 04
/200
8
ASSEMBLY SCREWS TO PREVENT GALLING AND BREAKAGE.
INSTALLATION, IT WILL BE NECESSARY TO ’WAX’ THE FRAME
DUE TO THE SCREW TENSIONS REQUIRED FOR CORRECT
NOTE: