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f.
Repeat steps 3.a. through 3.e. for the opposite
side of the door frame.
g.
Clamp one inside door frame board constructed
in steps 3.a. through 3.f. in place so that its
inside edge is aligned with the outer marks on
the bow and baseboard. Using a large framing
square, check to ensure they are at right angles
to the baseboard. Adjust as necessary. At the
top of the board, pre-drill and secure the board
to
the bow using a 5/16"-18 x 4" lag bolt and to
the
baseboard with a 5/16"-18 x 6" carriage bolt,
5/16" washer, and 5/16" nut. Repeat for the
opposite side.
h.
Rest a 2" x 4" x 12' board vertically on top of the
baseboard, outside one of the door frame
boards
installed above with the wide edge facing
outward from the end of the tunnel. Make a mark
just below the bow and cut to length (see
diagram on previous page). Clamp this new
outside door frame board to the inside door
frame board and secure with several 3" bugle
head wood screws.
"
Toe-nail
"
one of the screws
at a 45 degree angle at the bottom from the
outside into the top of the baseboard. You can
also add a metal gusset corner brace as we did
(shown above right) using 1.25" drywall screws.
Pre-drill from the top and secure to the bow
using a 5/16"-18 x 4" lag bolt. Repeat for the
opposite side.
3.a.
3.d.
3.g.
3.h.
3.h.
3.i.
3.h.
3.h.
3.j.
3.k.
3.l.
3.l.
3.l.
7617.999 Rev 06/21/2021 | AL, JG, ms