19 June 2001
for: number and size of piles, type and depth of bulkheads. The engineer shall
evaluate the diver's observations and determine the degree of hazard.
Figure 5-16 Inspection of Steel Structures (Above Water) Checklist
Refer to either Timber Structures (Figure 5-10) or Concrete Structures
(Figure 5-12) Surface inspection Checklist, depending on construction.
Exposed Area Under Pier or Along Wharf
Check for corrosion evidence: rust, scale and holes, in H-piles and sheet
piling, especially in the splash zone and approximately 60 cm (24 inches)
below mean water low water (Figure 5-17).
Sound the surface with a hammer to detect any scaled steel or hollow
Indicate the location, extent and type of corrosion (density pitting, etc.)
Check for loosening of structural connections as indicated by misalignment
of mating surfaces and by looseness or distortion of structural members
Check for deformation or distortion of a structural member in the form of a
sharp crimp, or compression of a bearing or batter pile (Figure 5-18). This
indicates possible overloading.
Check for deflection of steel sheet piling caused by failure of tiebacks or
Check for abrasion of steel structures as indicated by a worn, smooth,
Check for loss of foundation material caused by scour of materials from
around the piles supporting the structural element (Figure 5-18). A loss of
foundation material in front of a sheet pile bulkhead may cause kick-out of
the toe of the wall and result in total failure.
Inspect welds for signs of corrosion, cracking or looseness.
Inspect coating or wraps for any peeling, blistering, erosion, tears, etc.
Inspect holes in steel sheeting for loss of backfill material through the
opening and subsidence of adjacent ground surface.