EFCO 403 Series Roto Vent for Storefront - Manual (Page 11)

SHEAR BLOCK ATTACHMENT METHOD
7/8"
STEP 7)
holes 7/8" from the inside surface using a #18 drill (.170 dia.).
Drill through the sill member accurately at 1" from the ends and locating the
STEP 6) Drill through the meeting rail accurately at 1" from the ends and in the locating
groove using a #18 drill (.170 dia.).
STEP 5) Determine the location of the roto-vent. Mark the layout of the shear block
attachment screws using the template provided with these instructions.
CONT.
ATTACHMENT
PART PREPARATION &
SECTION V -
1.000
+.000
-.010
.172 DIA. DRILL
(3 HOLES)
PAGE 10
S100
(4 HOLES)
.136 (NO. 29 DRILL)
S100
the ends of the roto-vent
Use a butyl sealant at both
meeting rail and sill member
as shown in the shaded areas.