Acceptable Flooring Repairs.

TM 9-3990-206-14&P

9-11. ADDITIONAL INSPECTION CRITERIA (CONT).

Wood waterproofing is hazardous and flammable. Do not breath vapors and only apply

waterproofing in a well-ventilated area. Keep away from open flames. Wear protective

gloves and eye protection when applying waterproofing. Failure to comply may result in

injury or death to personnel.

NOTE

Notify direct support maintenance or supervisor if welding or repair is required.

(3) Acceptable Flooring Repairs. See Figure 9-11. Only one partial length repair board section per

container length and no more than three partial length repair board sections throughout the entire flatrack floor are

permissible. Partial length repair board sections must span at least four crossmembers and be a material of similar

size and configuration as the rest of the flooring. Laterally adjacent repair board sections must not have joints on the

same crossmember. Both sides of each joint must be adequately supported by and securely fastened to the top

surface of a crossmember. If the top surface of the crossmember, such as a "Z" shaped type crossmember, is too

narrow a structural angle must be welded to it to provide an adequate support surface. The added angle must be

sized to extend beyond the adjacent floor board on each side of the repair section joint.

(4) Acceptable Floor Gaps. A flatrack is unacceptable if there is any excessive gap around the perimeter of

the flooring or between the floor boards. If a 1 in. (2.54 cm) wide by 1/16 in. (1.59 mm) thick feeler gage can be

easily inserted "vertically" through a gap to the underside of the flatrack, the gap is considered excessive. Narrow

gaps less than 1/2 in. (12.7 mm) wide, however, are permissible if sealed with caulking.

(5) Structural Integrity of Floor Structure. If the strength of the floor is in doubt, the dynamic floor weight

(concentrated load) test specified in Annex II (see Para 9-11j) of the International CSC should be conducted to

ascertain that: the understructure will not deflect more than 9/32 in. (7 mm) below the bottom surfaces of the bottom

corner fittings, no component will be permanently deformed and no component or weld will fail.

9-20