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Figure 3-8.  Top Rail Sectioning
Top Rail - cont - TM-55-8115-203-23P_55

TM-55-8115-203-23P Container General Cargo: MILVAN Container W/Mechanical Load Bracing System; MILVAN Manual
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TM 55-8115-203-23 & P (7) Continuously weld the J-bar in place. (8) Paint the repaired area according to paragraph 2-4. (9) Replace door according to paragraph 2-7. 3-5.  Top Rail.  Use repair procedures in the following order of preference: Filling with weld metal, welding repair with inserts, sectioning, and replacing the top rail. CAUTION: Direct oxygen acetylene torch away from corner castings, side and end rails, and side and end panels to prevent damage to any of these parts. a. Repair of small cracks and tears. Small cracks and tears less than two inches in length should be filled with weld metal. (1) Carefully smooth ragged edges of tear with file or hammer before welding. (2) Grind along length of crack.  Grind crack to depth of 3/16 in.  (5 mm or 5/6 of metal thickness) to ensure full weld penetration. (3) Continuously weld along length of crack. (4) Paint according to paragraph 2-4. b. Inserting.    If  the  damaged  top  rail  cannot  be  repaired  by  gouging  and  welding  the  top  rail  may  be  repaired  by inserting. NOTE: All patches, inserts, sections and replacements for panels, rails and crossmembers should be steel  conforming  to  the  AISI-409  standard.    AISI  stands  for  the  American  Iron  and  Steel Institute.    This  steel  is  corrosion  resistant  and  has  a  minimum  tensile  strength  of  65KSI (thousand pounds per square inch). (1) Restrictions for insert repair of top rails are as follows. (a)    The insert must be at least six inches long.  See figure 3-7, example A. (b) New inserts must end at least six inches from existing inserts or other vertical welded seams.  If the area  to  be  repaired  is  closer  than  six  inches  to  an  existing  vertical  welded  seam,  the  insert  must extend to meet the existing vertical welded seam.  See figure 3-7, example B. 3-19







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