TM 55-2200-001-12
Change 3
Sec. 6-Fig. 65-A (Rev.-10-1981) (Concluded)
SEMI-TRAILER 12,000-15,000-18,000 LBS.-FLAT CARS
Pc.
Nos.
Forward Blocking Detail
1
2
2 in. x 6 in. x 92 in. Nail to car floor with one 30-D nail every 8 inches.
2
2
4 in. x 4 In., length to suit. Toenail to pc. 1 with four 16-D nails.
3
4
4 in. x 4 in., length to suit, per Sketch 3. Cut to insure full bearing for pc. 7. Toenail to pcs. 1
and 2 with two 16-D nails at each end.
4
2
2 In. x 4 in. x 30 in. Nail to pcs. 2 and 3 with three 12-D nails at each joint.
5
2
4 in. x 4 in., length to suit, per Sketch 3. Cut to insure full bearing for pc. 7. Toenail to pc. 2
and to car floor with two 16-D nails each end.
6
1
2 in. x 4 in. x 62 in. Nail to pcs. 2 and 5 with three 12-D nails at each joint.
7
2
Each to consist of one piece of 2 in. x 4 in. x 37 in., and one piece of 2 in. x 6 in. x 87 in. Nail
lower pieces to pcs. 2, 3 and 5 with two 12-D nails at each joint. Offset vertical joints as
shown in Sketch 2, view A and laminate top pieces to lower with six 12-D nails.
8
1
2 in. x 6 in. x 24 in. Nail to pc. 7 with six 12-D nails.
9
4
Each to consist of two pieces of 2 in. x 4 in. x 18 in. Nail first piece to pc. I with four 80-D nails,
Nail second piece on top In a like manner.
10
2
Each to consist of two pieces of 2 in. x 4 in. x 12 in. Nail first piece to car floor, against pc.5.
with three 30-D nails. Nail second piece on top of first piece in a like manner.
NOTES:
1.
All nails shall be cement coated.
2.
Wire rope tie-downs shall be tensioned sufficiently to cause slight vehicle body spring deflection.
3.
Forward blocking Item "G" may be preassembled with the exception of pcs. 9 and 10. Position pc. 7 six inches
behind king pin of trailer.
See General Rules 4, 5, 7, 9, 14, 15 and 19B for further details.
E-84
