Sec. --Fig. 80 (Rev.-10-1968)
TRACTORS, CRAWLER TYPE (WITH OR WITHOUT GROUSERS), CROSSWISE-FLAT CARS
Item
No. of Pcs.
Description
A
Brake wheel clearance. See Fig. 2, Sec. 1.
B
4 each tractor.
Each Item "B" to consist of
(A) One (1) Solid Wedge-shaped block 6 in. x 8 in. x 18 In. OR
(B) Two (2) 3 in. x 8 in. x 18 in. wedge-shaped blocks, nailed together with five (5) 30-D nails to form one 6 in. x 8 in. x 18
in. 'Block Unit'.
Locate each Item "B" (Solid Type, as described in (a) above, or 'Block-Unit' type, as described in (b) above), against each end
of crawler treads and secure to floor with three 40-D nails, and two 60-D nails, driven through top of block, and two 40-D
nails, toe-nailed through the sides of block one per each side.
*C
As required.
Each to consist of two pieces 2 in. x 4 in. x 72 In. Locate against outside face of crawler tread. Nail lower pieces to floor with
30-D nails spaced about 10 in. apart and top pieces to those below in similar manner. The use of three pieces in either top
or bottom section, to obtain full length, is permissible. Substitute if desired, at each location, one piece 3 in. x 4 in. x 72 in.
Nail to floor with ten 60-D nails equally spaced where practicable. Not required when Item "F" is used.
*D
As required.
Each to consist of two pieces 2 in. x 4 in. x 72 in. Locate between adjacent tractors. Nail lower pieces to floor with 30-D nails
spaced about 10 in. apart and top pieces to those below in similar manner. The use of three pieces in either top or bottom
section, to obtain full length, is permissible. Substitute, if desired, at each location, one piece 3 in. x 4 in. x 72 in. Nail to
floor with ten 60-D nails equally spaced where practicable.
*E
3 ea. end tractor.
Wedge-shaped blocks 4 in. wide, 12 in. long, height equal to height of Item "C". Space equally, with ends against Item "C"
and secure each to floor with five 30-D nails in each.
Substitute, if desired:
(A) Two 2 in. x 4 in. x 12 in. pieces at each location. Secure lower pieces to floor with five 20-D nails and top pieces to those
below with five 30-D nails; OR
(B) Solid blocks 3 in. x 4 In. x 12 In. at each location. Secure each block to car floor with four 60-D nails. Authorized only in
conjunction with Item "C" of 3 in. x 4 in. x 72 in. dimension.
F
2 ea. end of load.
4 in. x 5 in. x 12 in., hardwood. Locate in end stake pockets, against crawler treads. Each must be securely wedged in
pockets, or nailed to floor. Not required when Items "C" and "E" are used.
Where wedge shaped wheel or crawler blocking is used, such blocking may be chamfered at ends, provided suitable back-up blocks are used.
Detached parts, boxed material, etc., must be located as far from car sides and ends as practicable and secured to prevent displacement.
*If so equipped, mechanical brakes must be tightly set and levers wired.
See General Rules 4, 5, 9, 10, 14, 15 and 19-A for further details.
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