or formed into each side of the body.
on the chassis rails, and provisions shall
Front head sheet shall be formed or
be made to prevent lateral shifting of the
reinforced for rigidity. Front head and
breaker strips. When additional holes are
tailgate shall be not less than 150 mm (6
required to secure the mounting brackets
inches) for class C and 200 mm (8 inches)
to the chassis frame rails, they must be
for class D, E, F, and G higher than the
located within the area of the rail, which is
sides. Sides shall have pockets provided
designated as being safe for drilling in
at each end for insertion of sideboards.
accordance
with
the
chassis
The interior of the body shell and the side
manufacturer's body builders layouts.
reinforcements shall be welded with
Attachments shall neither interfere with
continuous welds. The top rail, sides and
nor obstruct chassis components.
tailgate shall be completely boxed and
3.5.4
TYPE IV (DUMP).
continuously welded.
The body shall
Type IV vehicles shall have a hydraulic
have sloping running boards and sloping
hoist operated dump body.
A rear
horizontal tailgate braces to minimize the
bumper is not required. Unless otherwise
buildup of dirt. Wiring harness across the
specified, the body shall have dimensions
rear apron shall be enclosed in conduit or
and level capacity of not less than that
polyethylene loom except at terminal ends
specified for the Standard Item Number.
and shall be secured by hangers to the
under body floor, on not more than 12
3.5.4.1
DUMP BODY CONSTRUCTION.
inch centers.
Body sides and front head shall be
constructed from not less than 8 gage
3.5.4.2
CAB PROTECTOR.
(4.176 mm) (0.1644 inch) A570 (50,000
A cab protector shall be attached to the
pounds psi yield strength) steel). Body
front end of the body. The cab protector
floor shall be no less than ¼ inch AR235,
shall extend the full width of the cab. The
(100,000 psi yield strength) steel. The
cab protector shall extend not less than
front head shall be capable of
580 mm (23 inches) forward from the front
withstanding a horizontal static load equal
of the dump body. The cab protector shall
to one-half the payload capacity of the
be not less than 10 gage (3.416 mm) for
vehicle without permanent distortion.
class C and 8 gage (4.176 mm) (0.1644
When body floor is constructed in two or
inch) steel for class D, E, F, G or 12 gage
more pieces, a continuous seam weld
(2.657 mm) for class C and 10 gage
having full penetration shall be provided.
(3.416 mm) (0.1345 inch) high tensile,
Full length, formed rub rails of minimum
345 MPa (50,000 psi) yield strength steel.
width to cover rear dual tire treads shall
The cab protector shall be capable of
be provided. Triangular or box-section
supporting an evenly distributed load of
vertical side braces constructed of not
not less than 680 kg (1,500 pounds). The
less than 10 gage (3.416 mm) (0.1345
cab protector is not intended to be used
inch) steel shall be equally spaced
for additional payload capacity.
Cab
between body front head and full box type
protectors for vehicles with overseas
rear corner posts and continuously
destinations shall be removable and shall
welded to side plates. Not less than two
be secured in the dump body for
vertical braces per side on Class C and D
shipment. Fasteners and components
and not less than three vertical braces per
shall be packaged, boxed, marked and
side on Class F, and G,
shall be
secured in the vehicle. When code CP is
provided. One horizontal brace (per side)
specified, and extended cab protector of
running the entire length of the body, tied
not less than 100 cm (40 inches) from the
into the front and rear corner pillars is
front of the dump body shall be provided.
acceptable in lieu of vertical braces. They
shall be sloped and continuously welded
Page 25 of 79
to verify that this 7 4Y
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