uniformly distributed load of not less than
intended to be used for additional payload
1800 kg/m2 (370 pounds per square foot)
capacity.
When specified, and for
overseas destinations, even if not
of floor area throughout the full lift range.
specified, the cab protector shall be
Crossmembers shall be welded to the
removable and shall be secured in the
body shell with not less than 100 mm (4-
dump body for shipment. Fasteners and
inch) lengths of weld, front and rear of
components shall be packaged, boxed,
both ends of each crossmember and with
marked and secured in the vehicle.
staggered, intermittent welds of not less
than 100 mm (4-inch) lengths, on not
3.5.4.3
DUMP BODY TAILGATE.
more than 300 mm (12-inch) centers.
The tailgate panel shall be not less than 8
Contact edges of crossmembers with
gage (4.176 mm) (0.1644 inch) A570 steel
longitudinal sills, and contact edges of
(50,000 pounds psi yield strength). The
welded reinforcements shall be welded for
tailgate shall be double acting, opening
not less than 50 percent of the edge
from top and bottom. The tailgate shall
length. Crossmembers shall be welded to
include hardware, support chains, and
the sloped outer rub rail to limit twisting.
tailgate latch. The latch shall be operable
Gussets, 3/16 inches thick, shall be
by a control at the left front corner of the
welded to every other crossmember and
vehicle body. All pivot points on the
each
longitudinal
to
provide
tailgate release shall be furnished with
reinforcement.
grease fittings, including top pivot pin.
The tailgate shall be reinforced to prevent
3.5.4.5 HYDRAULIC HOIST.
deformation under load.
The hoist class shall be as specified in the
item minimums, and shall be in
3.5.4.4
DUMP BODY
accordance with the National Truck
UNDERSTRUCTURE.
Equipment Association Dump Body Hoist
The dump body understructure shall
Chart. The hoist shall be a telescopic
conform to 3.5.4.4.1 or option code UN, at
type. Hoist hydraulic cylinders shall be
the manufacturer's option except when
chrome plated. The hoist shall lift the
specified by customer.
body to a minimum dumping angle of 50
degrees from the top of the truck chassis
3.5.4.4.1 CHANNEL OR I-BEAM
frame. The hoist shall be capable of
UNDERSTRUCTURE.
lowering the raised body by gravity when
Body longitudinal sills each having a
the pump is disabled. The pump shall be
minimum section modulus equivalent to
the direct mount type. The power take off,
that provided by a 150 mm (6 inches),
and valve shall be the manufacturer's
12.2 kg/m (8.2 pounds-per-foot) structural
standard for the hoist model furnished.
channel for Class B; 175 mm (7 in.), 14.6
The valve and power takeoff controls shall
kg/m (9.8 lb/ft.) for Class C, D, and E,
be located in the cab. A two-position
shall be provided to support hoist load.
lever or a two-speed hoist lowering valve
The minimum number of crossmembers
to provide "feather down" capability shall
specified in Figure VII for respective body
be provided.
sizes shall be provided.
Each
crossmember shall have a minimum
3.5.4.6 SAFETY LOCK.
section modulus equivalent to that
A mechanical safety lock permanently
provided by a 100 mm (4 inch) 11.5 kg/m
affixed to the dump body or hoist shall be
(7.7
pounds-per-foot)
I-beam.
furnished. The safety lock shall provide
Construction shall provide a body
positive retention of the dump body with
structure capable of supporting a
the body in the up position for servicing or
Federal Standard 807M
Page 27 of 65
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