Versalift 24, Руководство пользователя

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CONSTRUCTED
PLYWOOD
HEADERS
SECTION
I-JOIST
USE 2" NAILS
or SCREWS
PLACE BLOCK
INTO INSET TO
MARK OFFSET
INSET OFFSET
OFFSET LINE
WOOD
GLUE
USE 2" NAILS
or SCREWS
BLOCK
PLYWOOD HEADER
I-JOIST
2 x 2"
WOOD
GLUE
½ or 3/4"
PLYWOOD
2 x 4" or 2 x 6"
2 x 4" or 2 x 6"
2 x 4" or 2 x 6"
BLOCKING
(OFFSET)
BLOCKING
(OFFSET)
BLOCKING
(SET FLUSH)
2 x 2" TOP & BOTTOM RAILS
GLUE AND NAIL TO PLYWOOD
Fig. 17
2 EACH
CUT 1/4" PLYWOOD TO
PANEL INSIDE OF I-JOISTS
JOIST
58 1/4"
24”
O.C.
30.5"
58.5"
Fig. 19
Optional Framing Technique #4
FOR EXISTING HOMES WITH I-JOISTS:
(How to Fabricate Headers for I-Joists)
The procedure is generally the same as with I-Joists on
the prior page, but when the home is a finished
construction (already built and owned) you may not have
extra I-Joist pieces from which to construct headers. First
you should check with local building supplies, but if you
can’t find the same size I-Joists used to build your home
you may need a way to
construct headers from other
available material.
One way to address this problem is to construct headers
from 3/4” plywood and 2 x 2” rails (Fig. 17). Join the rails
to the plywood with wood glue and nails or screws.
Then attach offset blocking (Fig. 17) as previously
explained on page 9. Headers constructed this way will
have good strength and have the advantage of a smooth
face toward the opening. NOTE: The blocking is attached
flush with the ends of the I-Joist Section when using
constructed headers with a flat inside surface (Fig. 17).
The opening must be framed ½”oversized in only one
dimension (58 ½” x 31”) (Fig. 18), so that 1/4” thick
plywood can be cut (Fig. 19 inset) and used to panel the
two I-Joist faces inside the opening (Fig. 19) to produce a
final opening size of 58 ½” x 30 ½” (Fig. 19). Please note
that any nail heads in the opening must be set flush or
below the surface and decking and sheet rock must not
extend into the opening (Fig. 3).
NOTE: These illustrations show I-Joist on 24” centers, but
this framing procedure can also be used for 16” centers
(page 8). 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: Joist hangers can be used instead of blocking.
Finish opening with 1/4” paneling to cover hangers
and create a smooth-sided opening (Fig. 19, then
install 2 x 2” flashing in every corner (Fig. 2b, pg. 5).
10
Versa Lift
Installation - Framing Techniques Optional
INSIDE FINISHED OPENING
INSTALL 2 x 2” FLASHING
24”
O.C.
31”
58.5"
Fig. 18
I-Joist
Hanger
Depending on location
and code requirements,
web stiffeners may be
required for I-Joist when
using hanger brackets.
Web Stiffener