16
WARNING / AVERTISSEMENT / AVISO
A0800100-0011
Make sure that
support surface
under jacks
has sufficient
bearing capacity.
Veiller à ce que
la capacité de
charge de la
surface d’appui
sous les vérins
soit adéquate.
Asegúrese que la
capacidad de carga
de la superficie de
apoyo bajo los
gatos sea la
adecuada.
fi g. 1.20
fi g. 1.21
fi g. 1.22
fi g. 1.23
1
2
1
2
2
1 - M
OTORIZED
U
NIT
Suggested Cribbing
40" x 40" x 6"
(102 cm x 102 cm x 15,2 cm)
Plywood
40" x 40" x 3/4"
(102 cm x 102 cm x 1,9 cm)
2
2"x 10" x 40"
(5 cm x 25 cm x 102 cm)
12
Suggested cribbing for most bearing surfaces
The plywood and lumber used as cribbing should be secured together to prevent slipping.
Using screws instead of nails for securing will prolong the service life of lumber and plywood
used as cribbing.
Positioning the Motorized Unit
40" (102 cm)
40" (102 cm)
6" (15,2 cm)
Values shown in the above table
are for reference only. Any cribbing
equivalent to or larger than these
values can be used.
The type of cribbing chosen may vary according
to the bearing surface where the setup must be
installed.
For example, a setup installed on a concrete slab that
is covering the bearing surface would require cribbing
consisting of only one plywood panel under each mudsill
while a setup installed on a concrete slab that is covering
an indoor garage would require shoring in addition to
plywood cribbing.
A setup installed on a bearing surface composed of
gravel, sand or any such type of surface would require
stronger cribbing under the mudsills.
In cases where shoring is required, it is recommended
to contact an engineer for assistance.
Plywood
3/4" (1,9 cm)
Lumber
1 1/2" (3,8 cm)
Plywood
3/4” (1,9 cm)
Lumber
1 1/2" (3,8 cm)
Lumber
1 1/2" (3,8 cm)
1
2
