19 June 2001
REPAIR OF WOOD AND TIMBER STRUCTURES
GENERAL. The most common uses of wood and timber structures in
waterfront facilities involve:
Older piers, wharves, bulkheads, and quaywalls constructed from
dimension lumber, beams and stringers, and round timber piles.
Fender systems constructed from beams and stringers and round
Pile dolphins constructed from round timber piles.
Log floats and camels, glued and laminated wood, and
Degaussing facilities that require using nonmagnetic construction
Groins constructed from beams and stringers and round timber
With the exception of fender systems, floats and camels, most
systems have been installed for several decades, in many cases dating back to
World War II.
The need to conduct an effective repair program for these facilities is
essential if the facilities will continue to be used and if escalating costs of repairs
are to be avoided. Postponing the repairs, particularly for bearing piles, can lead
to costly replacement or downgrading of the structural capacity of the facility.
Repair Methods. Repair methods for wood and timber structures are
generally directed at correcting one or more of the following problem areas:
fungal decay, insect damage, marine borer deterioration, abrasion, and overload.
The repair methods to be used must consider the following elements.
Facility mission and required life.
Estimated life expectancy with and without repairs.
Projected load capacities.