Versalift 24, Руководство по установке

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8 Versa Lift
Opening Framing Techniques
Optional Framing Technique #3 - for new homes with
I-JOISTS 16” OC:
This procedure is similar to the one for
solid wood joists (see prior page). However, I-Joists are
too narrow on the ends to hold a nail when attaching one
I-Joist perpendicular to the face of another.
I-Joists can be joined perpendicular by using specially
formed metal hanger brackets.
Another way to join I-Joists is to install blocking on the
ends of I-Joist sections and headers (see Fig. 14). The
block provides a thickness to the end of the I-Joist that
can be nailed into. Second, the block is offset so that it fits
into the inset in the face of the perpendicular I-Joist. The
blocking should be attached securely (Fig. 14 inset) and
placed on the side opposite the opening (since the
opening must not have anything projecting inward).
I-Joists have recessed faces that form ledges that can
hang-up the lifting platform as it travels downward from
the attic. To resolve this problem and to cover any metal
hanger brackets,
all I-Joist openings must be framed
½”oversized in each dimension to 47” x 23” (Fig. 15).
Next cut 1/4” thick plywood panels (Fig. 16 inset) and nail
them to the four I-Joists faces inside the opening (Fig. 16).
The final size opening will be 46 ½” x 22 ½” (Fig. 16).
Please note that any nail heads in the opening must be
set flush or below the surface and decking and sheet rock
must be cut or installed flush to the opening (Fig. 2b &
16). Finish the opening by installing the 2 x 2” flashing in
the corners (Fig. 16).
As with solid wood joists, I-Joists that need to be cut must
be supported by some means until they are connected to
headers that tie them to adjacent I-Joists.
NOTE: This technique requires that you have additional
I-Joist material of the same size as that used in you
ceiling. If you do not have access to additional I-Joist,
then see the technique on the following page.
O.C.
CUT 1/4" PLYWOOD TO
PANEL INSIDE OF I-JOISTS
JOIST
22 1/4"
46.5"
22.5"
16"
O.C.
Note: I-Joist hangers can be used instead of blocking.
Finish opening with 1/4” paneling to cover hangers
and create a smooth-sided opening (Fig. 16), then
install 2 x 2” flashing in every corner (Fig. 16 & pg. 5).
I-Joist
Depending on location
and code requirements,
web stiffeners may be
required for I-Joist when
using hanger brackets.
Web Stiffener
Hanger
2 EACH
23"
47"
16"
Fig. 16
46 3/4"
JOIST
2 EACH
Fig. 15
INSTALL 2 x 2” FLASHING (4)
INSIDE FINISHED OPENING
I-JOIST/HEADER
BLOCK BLOCK
PLACE BLOCK
USE 2" NAILS
INTO INSET
or SCREWS
THEN MARK
WOOD
OFFSET LINE
GLUE
INSET OFFSET
OFFSET LINE
I-JOIST
I-JOIST SECTION
HEADERS
2x4" or 2x6"
BLOCKING
Fig. 14