19 June 2001
Table 6-1 Repair Techniques for Wood and Timber Structures
PIER SUPERSTRUCTURE AND FENDER SYSTEMS
Repairing timber pier superstructure
Repair by replacing timber fender pile and damaged chocks and
Protecting timber piles with Polyvinyl Chloride Polyethylene Wrapping
Partial posting of damaged pile with concrete encasement
Repairing timber piles with concrete encasement
Repair of retrofit timber piles with an underwater curing epoxy and
Replacing damaged pile with new timber pile under timber pier deck
Replacing damaged pile with new concrete pile under concrete deck
TIMBER SHEET PILING WALLS
Reinforcing tie-back system for timber sheet piling wall
Installing a tie-back system on the top of a timber sheet piling wall
Installing a concrete cap / face on a timber sheet piling wall
Repair of dolphins
ENVIRONMENTAL CONCERNS. Federal environmental regulations
allow the use of treated wood in the marine environment. A possible exception is
the sheen created when creosoted piling is driven but this can be mitigated.
Wood preservatives are EPA-registered pesticides and treated wood products for
the marine environment will be widely available for the foreseeable future.
Treated wood removed from service is not a hazardous waste and is not banned
by Federal law from landfills.
Local and state environmental regulations, especially along the west
coast, have restricted the marine use of treated wood. In some cases, where
there is cause for environmental concern, conduct a site-specific risk assessment
before starting on a project that involves installing a large amount of treated
wood in the marine environment.
The handling of treated wood removed from service should be
considered as an important part of any repair project. Discarded treated wood
may generally be disposed at municipal landfills approved to receive the material
by the state or local authorities. Some non-hazardous waste landfills, however,
may classify treated wood as a "special waste" and require documentation of its
status. Reuse of treated wood is a preferred option and is not currently regulated
by Federal law, provided such reuse is consistent with the intended end use.
Examples of reuse include fence posts, retaining walls, landscaping, decking,