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Page Title: Figure 7-1. Blocking and tiedown of the RTCC superstructure on a wood-deck flatcar (sheet 4 of 8).
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TM 55-3810-306-15
NOTES:
1.
Build and bolt the laminated block assembly to the bottom surface of the
turntable bearing.  Locate the holes in the laminated block by means of a
cardboard template of the hole spacing in the bearing. Bolts, nuts and washers
removed during demount of the superstructure may be used for bolting the
superstructure to the laminated block assembly. Install the stakes, crossbeams,
and slide plates to the railcar deck. Lower the superstructure onto the railcar so
that the laminated blocking contacts the slide plates.  Position the load
longitudinally as shown, and center it laterally. Support the boom so that the top
surface of the boom is level with the railcar deck.  Build and install the
counterweight and boom support structures as shown to fit the leveled load.
Install the tiedowns as shown (see note 5 below).
2.
Engage positive swing lock.
3.
Latch and tape closed all hinged and sliding openings: cab door, skylight, cab
sliding glass, and valve compartment lid.
4.
Shallow notches are permitted in braces to allow passage of tiedown cables.
5.
Each tiedown shown is a single length of .62-inchdiameter wire rope looped
through a railcar stake pocket and crane lug. Ends are joined as shown in detail
A. Tension all ropes to 3,000 pounds and torque rope clamp nuts to 95-Eoot-
pounds.
6.
Wood joints in structures, planking, beams and supports, shall be assembled
using nails as follows: Nail through turntable block laminations using sixteen
20d nails. Nail slide plate members through into railcar deck using 20d nails.
Where toenailing is required to assemble 4 by 4, 4 by 6, 4 by 8, and 6 by 8
beams, stakes, blocks, or to join beams or blocks or stakes to planking, bracing,
railcar deck, and so forth, use 30d nails and pre-drill top members of joint to
.156-inch diameter.
Figure 7-1. Continued (sheet 4 of 8).
7-5

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