Figure 5-2. Blocking and tiedown of the RTCC carrier on the M747 semitrailer (sheet 4 of 5).

TM 55-3810-306-15

NOTES:

1. Loading sequence: Install the track layering, crossbeams, and frame supports. Lower the crane carrier to contact

with the frame supports. Center the load laterally and position longitudinally as shown. The wheels of the carrier

should just touch the track layering. If not, nail shims to the top of the frame supports at either end as required.

First apply tiedowns 2, 3, 5, 6, 11, 12, 15, and 16 to seat the carrier against the O/R box supports, then apply

other restraints and chocks.

2. RTS75CC carrier load consisting of components below the turntable bearing equals 49,370 pounds, plus blocking

and tiedowns .

3. Suspension and fifth wheel loads are from actual weighing of loaded RTCC carrier on MS52162 semitrailer.

Weights may vary slightly because of variations in blocking materials and components.

4. Each tiedown shown is a single length of .62-inch diameter wire rope looped through a semitrailer stake pocket or

ring and carrier attachment point and are joined as shown in detail A. Tension all ropes to 3,000 pounds and

torque rope clamp nuts to 95-foot-pounds.

5. Latch and tape closed all hinged openings, engine access doors, tool compartment, and battery box. Cushion

mirrors and tape against frame.

6. Set parking brake.

7. Wood joints in structures, planking, beams, and supports, where bolting is not specified, shall be assembled

using nails as follows: Nail through wheel chock bottom plates into track layering using sixteen 20d nails. Nail 2-

inch-thick blocking and bracing with 20d nails. Where toenailing is required to assemble 4 by 4, 4 by 6, 4 by 8,

and 6 by 8 beans, blocks or to join beams, to join beams or blocks to planking, bracing, or track layering, use 30d

nails and predrill top member of joint to .156-inch diameter.

Figure 5-2. Continued (sheet 4 of 5).

5-13