TM 55-2200-001-12 Change 3 Sec.  6-Fig.  81 (Rev.-9-1984) TANKS AND SIMILAR UNITS OVER 100,000 LBS.-FLAT CARS Item No.  of Pcs.   Description A Brake wheel clearance.  See Fig.  2, Sec.  1. B 2 10 in.  x 18 in.  x 24 ft.  Locate, as shown, along each side of car.  Secure each to car with at least five 1 in.  dia.  bolts passed through Items "B" and "C", wood filler in stake pocket, and 1/2 in.  x 4 In.  x 10 in.  plate underneath stake pocket.  Not required for units loaded on floor of car. C As required.   Metal fillers, length, width and thickness to suit.  Locate between Items "B" and top of stake pockets.  Not required when units are loaded on floor of car. D 4 Each to consist of two pieces of 2 in.  x 6 in.  x 18 in.  Locate against Item "B" as shown. Secure lower piece to floor with four 30-D nails, and top piece to one below in like manner. Not required for units loaded on floor of car. E 2 Blocks, pattern 30.  Locate one against each front crawler tread. F 2 Blocks, pattern 31.  Locate one against each rear crawler tread. G 2 ea.  Item "E" 2 in.  x 3 in.  x 20 in.  Locate, as shown, against each side of Items "E" and "F" and secure to and "F". floor or Item "B" with four 20-D nails in each. H 4 Each to consist of two pieces of 2 in.  x 12 in.  x 18 in.  Locate one against each Item "E" and "F".  Secure lower piece to floor or Item "B" with five 30-D nails and top piece to one below in like manner.  Substitute, if desired, patterns 81. J 6 2 in.  x 8 in.  x 13 in.  Locate, as shown, against Items "B" and crawler, one near each end of unit and one at center.  Secure each to Item "B" with four 30-D nails, and to Item "K" with three 30-D nails.  Not required for units loaded on floor of car, or when patterns 80 are used. K 3 4 in.  x 6 in., length equal to distance between Items "J".  Not required for units loaded on floor of car.  Substitute, if desired, patterns 80. L 2 Each to consist of two pieces of 2 in.  x 4 in.  x 14 ft.  Locate against inside of crawler treads.  Se- cure lower piece to floor with 30-D nails spaced about 12 in.  apart and top piece to one below in like manner.  Required only when units are loaded on floor of car.  Substitute, if desired, tread side cleats, Pattern No.  75, Section No.  6.  Apply three (3) to the inside of each crawler tread.  Locate at ends and center and secure to car floor as specified under Pattern No.  75. M 3 Each to consist of two pieces of 2 in.  x 4 in., length to suit, suitably spaced between Items "L". Secure lower piece to floor with 30-D nails spaced about 12 in.  apart and top piece to one below in like manner.  Required only when units are loaded on floor of car.  Not required when tread side cleats, Pattern No.  75, Section No.  6, are substituted per Item "L". N As required.   Each to consist of two pieces of 6 in.  x 6 in., length to suit, cut to fit contour of bogie wheels. Locate one piece between Inside and outside wheels of each bogie assembly. O 1 ea.  Item "N". 2 in.  x 4 in., length to suit.  Locate on top of Item "N", as shown, and secure with four 20-D nails. P 8 1 1/4 in.  dia.  rods.  Attach to lifting lugs and pass through stake pockets and 1/2 in.  x 4 in.  x 10 in.  plates underneath stake pockets, as shown.  Substitute, if desired, 5/8 in.  x 6 x 7 steel cable, doubled.  Substitute, if desired, 1 1/4 in.  diameter rods, 4130 alloy steel with minimum yield strength of 100,000 lbs.  psi per rod, attaching two per end to lifting lugs and stake pockets. Q 2 3/8 in.  steel cable, doubled.  Locate, as shown, between gun turret and crawler structure. *R 2 ea.  unit. 3/8 in.  steel cable, 6x19 IWRC.  Apply two 3/8 in.  cables in a complete loop securing gun barrel to unit at each side.  Not required when unit is equipped with external built-in gun brace: however, if external gun brace is inoperative, cable will be used.  Substitution of wire or banding is not authorized. *When necessary to extend floor for the application of Items "G" on units loaded on floor of car, use method shown in Figure 1-C, Sec.  1. Turret gun should be In straightforward position, and turret lock handwheel and elevating mechanism handwheel must be wired to prevent rotation. When tie-down rods are found slightly loose in transit, they need not be tightened. Hand brakes must not be set. "NOTICE" *This figure, when applicable, is to be used for the loading of vehicles being shipped under the provisions of ICC Special Permit No. 3498 during a National Emergency when the gross weight for each loaded vehicle is in excess of 100,000 pounds. See General Rules 4, 5, 7, 9, 11, 14, 15, 19 and 19-A for further details. E-105