Cut to size, clean and fit replacement insert into position. The insert must fit flush with
original rail. Allow no more than 5/64 in (2 mm) clearance between adjoining surfaces.
Angle edges of insert and rail at 30 for weld groove.
Make sure to prime interior of insert before installing in bottom rail.
Tack weld, check alignment and continuously weld.
Rivet rail (1) to side panels (3) and cross members (4). Install barrier tape to prevent
contact between dissimilar metals. Leave appropriate holes for refoaming.
Clean, mask, prime and top coat the repaired area.
Sectioning or Full Length Replacement.
When installing a replacement section, the entire cross sectional profile of the rail must be
Determine the length of rail (1) to replace. Mark where cuts are to be made.
If necessary, remove the refrigeration unit (para. 4-29). Remove any foam, lining,
and/or other parts which block access to the repair area.
Remove fasteners (2) securing floor lining (5) to the front bottom rail.
Remove enough foam insulation to access the heads of the fasteners securing the
subfloor panel to the front bottom rail. Remove these fasteners.
Remove fasteners securing side panel (3) and cross members (4) to bottom rail (1).
Separate side panel and bottom rail with wedges no more than 5/32 in (4 mm) thick.
Use a disc cutter to free the damaged part of the rail.
Grind all cut areas smooth and clean.
Straighten the remaining rail edges if bent.
Allow no more than 5/64 in (2 mm) clearance between adjoining edges to be butt welded. The
ends of the replacement rail should be chamfered to allow proper weld penetration.
Cut to size, clean and fit replacement section or new rail into position. The section must
fit flush with the remaining rail profile.
Angle edges of insert and rail at 30 for weld groove. Make sure to prime interior of
insert before installing.
Position new rail or section and tack weld.
Check alignment to ensure that dimensional tolerance are maintained. Make any
corrections before installing section.