Anthony Lifgtates, Inc.
16
MRT Models
www.anthonyliftgates.com
800-482-0003
4.6 Installation Of RailTrac Liftgates On
Flatbed Trucks
Described below is the installation requirements for the
diagonal bracing used on fl atbed truck bodies. Two
sets of diagonal braces (two upper and two lower)
are required. Diagonal braces can be made from the
shipping/lift supports or other recommended materials.
42"
(minimum)
A-1046
42"
(minimum)
Diagonal bracing is
required
for
all liftgate installations.
Install upper and lower diagonal
bracing on both sides of the liftgate.
Lower Diagonal Brace
Use the shipping/lift support or a minimum
of 2½" x 2½" x ¼" angle iron or a ¼" thick
steel plate.
Extend this brace at least ½ the distance of
the rail length.
Upper Diagonal Brace
Use the shipping/lift support or
a minimum of 2½" x 2½" x ¼"
angle iron.
1. Weld or bolt the liftgate to the truck bed. Refer to the
normal installation procedure for recommendations
and safety precautions.
2. Weld an upper diagonal brace between the
H-frame rail and the truck bed on each side. The
ends of the diagonal brace should be a minimum of
42” above the truck bed and a minimum of 42” from
the end of the truck bed.
a. Cut two upper diagonal braces from the shipping/
lift support or from
2 1/2 x 2 1/2 x 1/4” thick angle iron.
b. Weld each diagonal brace to the H-frame rail and
to the top of the truck bed.
3. Weld a lower diagonal brace between the
H-frame rail and the truck bed on each side. The
lower diagonal brace or gusset should extend at
least one half the length of the rail. For example, if
the H-frame rail extends 20” below the truck bed, the
ends of the diagonal brace should extend at least 10”
downward and 10” inward from the end of the truck
bed.
c. Cut two lower diagonal braces from the shipping/
lift support or from 2 1/2 x 2 1/2 x 1/4” thick angle
iron. A gusset (support plate) can also be made
from a 1/4” thick steel plate.
d. Weld each diagonal brace or gusset to the liftgate
H-frame rail and to the bottom of the truck bed.
4. If the truck body corner posts are made from
aluminum, six steel mounting brackets must be
fabricated and installed on the corner posts.
WARNING
CRUSH HAZARD
It is the responsibility of the installer(s) to make
sure the steel mounting brackets will safely
hold the liftgate onto the truck. If these brackets fail,
possible injury or death may result.
a. The mounting brackets should be made from at
least 3/16” thick steel plate. The eight mounting
holes should be for 1/4” bolts or larger. Make
the brackets similar to the example shown in the
following drawing.
As required
10"
Approx.
3"
3"
3"
1"
_
2
1"
_
2
3/16"
thickness min.
A-1004
Dimensions for steel mounting plates.
b. Mount the steel brackets to the aluminum corner
posts at the locations shown below. The sill of the
truck bed may also require shims to make sure the
surface of the mounting brackets and the sill are
flush.
Aluminum
Corner Post
45" (61" on above bed
height models)
Bed Height
Rear sill and brackets
must be flush.
A-1005
Mounting locations for steel mounting brackets.
