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This discussion will review case studies from several bridge access projects where suspended scaffolding was used to provide safe, economical access for crews performing inspection, structural repair, demolition, blasting and coating work. Special attention will be paid to advanced project planning, worker safety requirements, unique platform configurations and productivity improving tips.
One of the, if not the most, vexing problems for bridge maintenance personnel is the deterioration of bridge components below leaking joints. The joints may be open or closed, construction or expansion, but all seemingly leak shortly after construction or resealing. The bridge components affected by the leaking joints may be steel or concrete, but the end result is the same, deterioration.
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A bridge coatings specification can be a complex and sometimes confusing document to navigate through. Yet it is regarded as the rulebook for quality control and quality assurance personnel responsible for inspecting the quality of work. An inspection plan is a tool that can make the process of understanding the inspection checkpoints invoked by a bridge coating specification more streamlined and can be a key communication tool for contractor and inspection personnel.
Over 30 percent of the 607,000 bridges in the FHWA National Bridge Inventory have steel superstructures. Most of those are protected from corrosion damage by thin film coatings or paints. Those coatings have a finite life in relation to the steel they protect. Over time, they degrade, eventually requiring repair or replacement. When selecting this type of superstructure for a bridge, the operating agency incurs an obligation to maintain the coating on the steel to protect it from corrosion to obtain its full service life.