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and turns up to 60 degrees for truck-dolly semitrailer combination as measured from
straight-ahead to the right and to the left shall not cause damage to or interference between the
prime mover, dolly, or unit. Braking ability. The combined service brakes of the prime mover and unit shall
control, decelerate, and stop the combination in accordance with ICC Regulations, except that
the brake application and stopping distance shall be accurately measured from initial movement
of the brake pedal to the stopping point. The emergency breakaway system shall provide a
controlled, emergency brake application that shall stop and hold the unit without hazardous
unbalance when actuated by disconnect, breakage, or leakage of the emergency line. With the
brake system of the unit stabilized at a maximum working pressure of 100 psi, air leakage within
the dolly-semitrailer brake system tested in accordance with TTMA3-1-12 shall not exceed
0.5 psi per minute with the brakes released, nor exceed 1.0 psi per minute with the brakes
applied. Suspension system. The suspension system of dolly and unit shall withstand the
imposed loads without evidence of overload, wear, malfunction, or permanent deformation when
subjected to the loadings and the operating conditions specified herein. When the dolly is
coupled to the semitrailer, the articulation shall provide not less than 6 inches difference in
elevation between opposite wheels on each axle without loss of tire-to-ground contact. In
addition, not less than 6 inches articulation shall be required between all combinations of
diagonally opposite wheels on multiple axle suspensions without loss of tire-to-ground contact.
The 6 inches of articulation shall be 3 inches up and 3 inches down.
3.17.2 Railroad. Sectionalization for rail transportation shall be within the dimensional
limits shown on figure 4, except that item length shall be not more than 38 feet 10 inches.
Sectionalization and reassembly shall each be accomplished in not more than 6 hours without
cutting or welding.
3.17.3 Air Transport. Sectionalization for air transport shall be within the dimensional limits
shown on figure 5. Sectionalization and reassembly shall be accomplished as specified in 3.17.2.
3.17.4 Lifting and tiedown attachments. All sections separated to meet the requirements of
3.17.2 and 3.17.3 shall be provided with lifting and tiedown attachments conforming to 3.22 and
3.23, respectively.
3.18 Feeder assembly. The feeder assembly shall consist of a surge hopper with removable
grizzly, and an electric-motor-driven reciprocating plate feeder with adjustable gate.

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