Construction Specifications - Genie Z-45/25 Operator's Manual

Cribbing Instructions

Construction Specifications

The specifications on this page are for cribbing
under machines with wheels. For machines with
tracks, see the specifications on the following
page.
• Cribbing is to be constructed of APA certified
plywood sheets.
• Each plywood sheet must be a minimum of
3
/ inch thick.
4
• Each plywood sheet must be a minimum of
24 inches by 24 inches.
• Plywood sheets must be layered together with a
minimum of 24 inches of overlap for joints.
• Layers are to be secured with 6D ring shank
nails, placed a minimum of 8 inches OC edge
and 12 inches OC face. Use 8d ring shank nails
1
for plywood over 1
• Each end of the cribbing is to have a ramp or a
chock that extends the full width of the cribbing.
The chock must be a minimum of 6 inches by 6
inches.
2
/ inches thick.
8
Added illustration.
• Ramps are to be constructed in a series of
steps. Each step shall be a minimum of 12
inches long.
• The maximum total ramp height shall not
exceed 8 inches.
• Make sure that machine wheels have a 24 inch
long surface to rest on when the platform is
raised.
• Cribbing must not be constructed to accomodate
turns or curves.
• Cribbing must be constructed so that no
machine tire is more than 8 inches off the
ground at any time.
• Do not drive both front and rear wheels onto the
cribbing. Only one set of wheels should rest on
the cribbing. The other set of wheels needs to
remain on solid ground.
6° (10%) max.
Added info. spec.
unchanged.
First Edition • Fifth Printing
Added info. spec.
unchanged.
Part No. 82943