OO-S-2822
3.6 Design. The mobile saw assembly shall be designed to withstand the
strains, jars, and vibrations incident to shipping, storage, and the conditions
of mobile operation specified herein. Design of components and accessories
covered by referenced specifications, and OSHA standards in effect at time of
manufacture shall be as specified therein. The detailed design of such
components as the storage box, control panel, and sawdust shield shall be the
responsibility of the contractor, subject to the applicable requirements of this
specification and approval by the contracting officer of the first article
sample, when required. Installation and location of components and accessories
shall be such as to permit normal maintenance and servicing of equipment.
Safety requirements for the saw shall be in accordance with provisions of the
applicable referenced specification. No portion of the equipment shall extend
beyond the bumper in transit. The specified components and accessories shall be
so located and installed on the chassis by the contractor so that the resultant
weight distribution shall impose a static loading of not greater than 500 pounds
(lb) (226.8 kilograms (kg)) on the lunette to assure proper handling of the saw
while being towed. A weather resistant caution sign shall be placed on the
front of the saw table. The sign shall read: CAUTION - EYE AND EAR PROTECTION
IS REQUIRED WHILE OPERATING. The word "CAUTION" shall be the heading in
3/4-inch (19.1 mm) or larger letters. The balance of the sign shall be in
letters of not less than 1/2-inch (12.7 mm). Color of the lettering shall be
black on yellow background.
3.6.1 Chassis. The wheelmounted undercarriage shall be of the two-wheel,
pneumatic tired type designed to support the complete saw assembly, and all
accessories. Suspension, axles, and tires shall have rated capacities not less
than the actual load imposed by the components. The tongue shall be designed to
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permit the chassis to turn about the lunette not less than 60 degrees ( ) from
either side of the longitudinal centerline of the chassis. The undercarriage
shall be furnished complete with springs, wheels, tires, landing leg, leveling
jacks, drawbar ring, and safety chains. The dry weight of the saw, with all
components and accessories mounted thereon, shall be not greater than 6,000 lb
(2721.6 kg), Unless otherwise specified (see 6.2.1), the overall dimensions of
the assembled saw shall be not greater than 96 inches (243.8 mm) in height by 96
inches (243.8 mm) in width by 180 inches (45.7 mm) in length. The undercarriage
shall be furnished with fenders covering both wheels. The fenders shall be flat
on the top and shall be capable of withstanding a 150-lb (6.8 kg) load placed on
the fender. When a breakaway brake system is incorporated as a part of the
manufacturer's standard package, a positive mechanical lockout shall be provided
to prevent the brakes from locking when the saw is pushed rearward. The towing
tongue shall be adjustable ±2 inches (50.8 mm) from centerline of the tongue.
3.6.1.1 Mobility. The saw, components, and accessories installed and in
place shall be capable of being towed at speeds up to 50 miles per hour (mph)
(80.5 kilometers per hour (km/h)) on smooth, hard-surfaced highways and at
speeds up to 20 mph (32.2 km/h) over unimproved roads and open, rolling, and
hilly terrain.
3.6.1.2 Wheels. Wheels shall be remountable at the hub and shall be
equipped with standard ball or roller bearings. The components shall be mounted
on the undercarriage in a manner to insure that each wheel supports, to the
maximum practicable extent, an equal load. A lug wrench shall be provided for
the removal of wheels.
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