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Replacement - TM-55-8115-203-23P_57
Figure 3-9.  Bottom Rail Inserts

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 (8) Bevel to a thirty degree angle the rail edges which will butt against the corner fittings. (9) Tack weld the replacement rail in place.  Check standard dimensions according to figure 3.1 and adjust as necessary. (10) Continuously weld the rail to the corner fittings, roof panels and side or end panels. (11) Paint the replacement area according to procedure 2-4. (12) Test for weatherproofness using procedure 2-5.  Caulk if necessary. 3-6.   Bottom  Rail.    Avoid  using  heat  when  repairing  the  bottom  rail.    Use  repair  procedures  in  the  following  order  of preference: Filling with weld metal welding repair with inserts, sectioning and replacement of the rail. 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). 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 procedure 2-4. b.  Inserting.  If the damaged bottom rail cannot be repaired by gouging and welding the bottom rail may be repaired by inserting.  The minimum length of bottom rail inserts is six inches. (1) Restrictions for insert repair of bottom rails are as follows. (a) The insert must be at least six inches long.  See figure 3-9, 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 3-9, example B. 3-23







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