boards. The interior of the body shell and
Attachments shall neither interfere with
the side reinforcements shall be welded
nor obstruct chassis components.
with continuous welds. The top rail, sides
3.5.4
TYPE IV (DUMP).
and tailgate shall be completely boxed
Type IV vehicles shall have a hydraulic
and continuously welded. The body shall
hoist operated dump body.
A rear
have sloping running boards and sloping
bumper is not required. Unless otherwise
horizontal tailgate braces to minimize the
specified by option code, the body shall
buildup of dirt. Wiring harness across the
have dimensions and level capacity of not
rear apron shall be enclosed in conduit or
less than that specified per the Standard
polyethylene loom except at terminal ends
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
Figure VII - TYPE IV Dump Truck
constructed from not less than 8 gauge
Requirements
(4.176 mm) (0.1644 in) A570 (50,000 psi
Capacity 6.1/ 8
7.6/ 10 9.2/ 12
yield strength) steel. Body floor shall be
3
(m / cu.
Code
no less than 1/4 inch AR235, (100,000 psi
yd)
B15
yield strength) steel. The front head shall
=11.5/15
be capable of withstanding a horizontal
3960/144 4270/168 4570/180
Body
static loan equal to one-half the payload
Length
capacity of the vehicle without permanent
(mm / in.)
distortion. When body floor is constructed
Number 11
13
14
in two or more pieces, a continuous seam
of cross
weld having full penetration shall be
members
provided. Full length, formed rub rails of
Vertical
4
5
5
minimum width to cover rear dual tire
brace per
treads shall be provided. Triangular or
side,
if
box-section side braces, of the minimum
provided
width quantities specified in Figure VII for
Horizontal 1
1
1
the respective body length and vehicle
braces
classes, shall be constructed of not less
per side
than 8 gauge (4.176 mm) (0.1644 in)
steel. One horizontal brace (per side)
running the entire length of the body, tied
3.5.4.2
CAB PROTECTOR.
into the front and rear corner pillars is
A cab protector shall be attached to the
acceptable in lieu of vertical braces. They
front end of the body. The cab protector
shall be sloped and continuously welded
shall extend the full width of the cab. The
or formed into each side of the body.
cab protector shall extend not less than
Side braces shall be equally spaced on
1020 mm (40 inches) forward from the
each side of the body, between the head
front of the dump body. The cab protector
sheet and full box type rear corner posts,
shall be not less than 8 gage (4.176 mm)
and welded to body side plates. Front
steel or 10 gage (3.416 mm) (0.1345 inch)
head sheet shall be formed or reinforced
high tensile, 345 MPa (50,000 psi) yield
for rigidity. Head sheet and tailgate shall
strength steel. The cab protector shall be
be not less than 200 mm (8 in) higher
capable of supporting an evenly
than the sides. Sides shall have pockets
distributed load of not less than 910 kg
provided at each end for insertion of side
(2,000 pounds). The cab protector is not
Federal Standard 807M
Page 26 of 65
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