TM 55-5811-188-14 Table 7-2.  Continued Item No.  Required Application wire rope (detail 1, fig 7-3).  Tension the wire rope and tighten the clamps to 95 foot-pounds.  Use one clamp to secure each thimble to the wire rope at the stake pocket and shackle (fig 7-3). K 8 Thimbles.  Place one thimble on the wire rope at each stake pocket and shackle. L 4 Same as item H. M 4 Wheel blocks.  Each consists of six 2- x 6- x 16-inch lumber.  Cut and assemble each block as shown in detail 1, figure 7-3.  Place the blocks between the road wheels (two on each track). GENERAL INSTRUCTIONS 1. The load, as shown, is based on a flatcar with a width of 10 feet 6 inches. 2. Handbrakes must not be set. 3. Tensioning of wire rope can be accomplished with an applicable sized come-along mechanical hoist or equal tensioning device. 4. For  further  details,  see  General  Rules  1,  2,  3,  4,  5,  9,  14,  15,  19A,  and  19B,  Section  No.    1,  General  Rules Governing the Loading of Commodities On Open Top Cars, published by the Association of American Railroads. Table 7-3.  Bill of Materials for Blocking and Tiedown of CUCV on Wood-Deck Flatcar (Fig 7-2) Approximate Item Description Quantity Lumber Douglas-fir, or comparable, straight-grain, free from material defects; Fed Spec MM-L-751: 6- x 8-inch 8 linear feet 2- x 6-inch 8 linear feet 2- x 4-inch 16 linear feet Nails Common, steel, flathead; bright or cement-coated; Fed Spec FF-N-105: 12d 12 20d 24 40d 40 Clamps Wire rope, U-bolt clamps, saddled, single-grip, steel, Crosby heavy-duty, or equal; Fed Spec FF-C-450: 3/8-inch 16 Wire rope 6 x 19, IWRC; improved plow steel; preformed, regular-lay; table X, Fed Spec RR-W-410: 3/8-inch 34 feet Cushioning waterproof paper, burlap, or other suitable material as required material Table 7-4.  Application of Materials for Blocking and Tiedown of CUCV on Wood-Deck Flatcar (Fig 7-2) Item No.  Required Application A - Brake wheel clearance.  Minimum clearance required is 6 inches above, in back of, and on both  sides  of  and  4  inches  underneath  the  wheel.    Also  required  is  a  12-inch  minimum clearance from end of car to load, from center of brake wheel to side of car, and 6 feet above car floor (fig 7-2). B 8 Chock block (detail 1, fig 7-3).  Place 45°  portion of block against front and rear of each wheel as shown in figure 7-2.  Nail heel of block to car floor with two 40d nails. C as required Cushioning material (detail 2, fig 7-3).  Locate so that material is under item D and extends 2 inches above item D, between tires and item D. D 4 Side blocks (detail 2, fig 7-3).  Each consists of one piece of 2- x 6- x 24-inch lumber and two pieces of item H, 2- x 4- x 24-inch lumber.  Nail 2- x 6- x 24-inch piece to edge of lower 2- x 4-  x  24-inch  piece  with  four  12d  nail.    Place  2-  x  6-  x.18-inch  piece  against  cushioning material and tire, and nail to car floor in a staggered pattern through 2- x 4- x 18 inch piece with four 20d nails.  Nail upper 2- x 4- x 24-inch piece to lower piece with four 20d nails. E 4 Tiedowns (detail 3, fig 7-3).  Each consists of one piece of 3/8-inch 6 x 19, IWRC wire rope, length   as   required   (about   15   feet).      Form   a   complete   loop   between   truck   tiedown   and appropriate  stake  pocket  at  a  maximum  angle  of  45°.    Wire  rope  should  overlap  about  20 inches. 7-6