3-8. General (cont).
d. Welding is required.
e. Damage to a structural member is severe enough to cause distortion of a wall, especially in edge or corner
f. Lift, tow or tiedown fittings or corner castings are damaged severely enough to indicate possible damage to
the underlying structural member.
If nature of damage warrants it, print a caution notice using 4-inch high letters on all
outside walls of the shelter as follows: CAUTION: DAMAGED SHELTER. DO NOT
Coat threads of all screws and bolts with sealer before installing. Fill rivet and rivnut
holes with sealer before using.
Unless otherwise noted, procedures described apply to all three configurations of shelter
covered by this technical manual.
Unless otherwise noted, all procedures can be performed by one person, using standard
tools listed in Appendix B, Section Ill.
3-9. General Repair Procedures. The procedures described in this paragraph are general procedures
that may be needed during repair or replacement of many of the shelter components. Wherever these general
procedures apply, they are referenced at the appropriate point in the specific maintenance procedure paragraph.
a. Blind Rivet Installation and Removal. Blind rivets are used in locations where only one side of the area to
be worked on is accessible. Blind pop rivets must be used in the shelter foam and beam panels, since the
hammering required to install conventional rivets would damage the material. The types of rivets used in the
shelter are shown in figure 3-3 and described in table 3-2. When installing floor patches, countersunk head rivets
are preferred. Dome head rivets are an acceptable alternate. When installing interior wall patches, countersunk
head rivets shall be used in any location in which dome head rivets will interfere with the proper installation of
equipment. Closed end rivets shall be used for exterior repairs and floor repairs to prevent moisture and dirt from