Folio 1316-5
BOOM, JIB, TOWER, AND MAST
Corrosion and Abrasion
Refer to Figure 5.
Corrosion and abrasion must not be deeper than 10 percent
of the wall thickness, the angle thickness, or the plate
thickness.
FIGURE 5
P325
P326
Not Acceptable
Abrasion from handling with
chain exceeds allowable limit
Not Acceptable
Surface is badly pitted;
exceeds allowable limit
Acceptable
Surface is relatively smooth:
within allowable limit
CORRODED CHORD
395143
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