19 June 2001
REPAIR OF STEEL STRUCTURES
GENERAL. Steel is used extensively in construction and repair of
waterfront facilities due to availability, cost, ease of fabrication, physical and
mechanical properties, and the design experience with its use. Structural steel
and cast or fabricated steel are used in all areas of the waterfront. Typical
applications requiring maintenance include:
Piers, wharves, bulkheads, and quaywalls using steel H-piles or
pipe piles to support or brace the structure; steel sheet piling used
to retain fill; structural steel shapes used for framing.
Fender systems incorporating steel H-piles.
Mooring hardware such as cleats, bollards, bitts, and chocks made
from cast or fabricated steel.
Other items such as utility lines, grating, opening frames, space
manhole covers, fences, bolts and nuts, handrails, and concrete
Steel components of camels.
Corrosion is the major cause of deterioration of steel structures and
components. The extent or severity of corrosion will vary with the exposure zone
of the material; that is, whether it is in the atmospheric zone, the splash or tidal
zone, or the submerged zone. Selection of the repair technique must consider
each of these varied conditions and such other elements as:
Facility mission and required life.
Estimated life expectancy with repairs and without repairs.
Projected load capacities.
Problems associated with mobilization of equipment, personnel,
and materials to accomplish repairs/maintenance.
Economics and trade-offs.