46.5"
22.5"
DOUBLE JOISTS WITH
SIMILAR SIZE BOARDS
16"
O.C.
Fig. 8
46.5"
24"
O.C.
22.5"
DOUBLE JOISTS WITH
SIMILAR SIZE BOARDS
Fig. 7
24"
O.C.
46.5"
22.5"
Fig. 5
NOTICE: The general framing illustrations & techniques
(pages 6-9) are provided for illustrative purposes only
and are not intended as specific directions for you to
follow in your individual installation.
Use them to help you
plan your installation with a professional engineer, architect, or
contractor, according to local codes and building practices.
BPG does not warrant this product to be suitable for your
intended purpose, location, structure, installation or use. You
are responsible for choosing the appropriate location, method
of installation and determining suitability of this product.
ALIGNED OPENING VS TRANSVERSE OPENINGS:
In general, transverse openings should be avoided
because more joists will have to be cut which will weaken
the ceiling more than an aligned opening.
An aligned
opening with joists 24” OC can be framed
without the need to cut a ceiling joist (Fig. 5).
An aligned
opening with joists 16” OC requires one joist
to be cut (Fig.6).
A transverse
opening with joists 16” or 24” OC will
require more joists to be cut (Fig. 7 & Fig. 8).
Please consult a professional to evaluate the strength ceiling
construction and determine if transverse mounting is advisable
and to determine if you will need to double the adjacent joists
to compensate for the joist(s) you cut (see Figs. 7 & 8). This
will depend on a number of factors, including the size and span
of the existing joists, whether or not there are roof trusses
involved, and where roof supports are located.
16"
O.C.
46.5"
22.5"
Fig. 6
MAY NEED TO
BE DOUBLED
6
Versa Lift
ATTIC OPENING PREPARATION
Note: Joist hangers can be used instead of blocking.
Joist hangers must be covered with 2 x 2” “L” flashing
(provided) to prevent the lift platform from hanging in
the opening, causing lift malfunction or damage (see
Fig. 2a, 2b, & 3 pg. 5 for details).
Joist Hanger for
Solid Wood Joists