Bridge Safety Standards Compliance Manual
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header information, the date of the inspection, the date of report creation, and the inspector’s
identification. A report containing only these pieces of information would be defective.
Where a structural element is typically hidden from view, such as abutment footings or piles
beneath a pier, the condition is normally evaluated by observing the behavior and condition
of structural elements that are supported by the hidden element. In such a case, no sign of
distress may be inferred to mean that nothing is wrong. If an element is hidden but should
not be, such as bridge seats buried in ballast, then the report should indicate that the element
could not be inspected and the reason.
The regulation does not specify how the track owner must format the inspection report, only
that it be able to capture “[t]he condition of components inspected, which may be in a
condition reporting format prescribed in the BMP, together with any narrative descriptions
necessary for the correct interpretation of the report.” The key here is that there is sufficient
“narrative description necessary for the correct interpretation of the report.” Where the
reporting format does not divide members into discrete elements, adequate narrative is
essential, especially for elements that are in less than good condition. The level of detail
provided must be sufficient for the RBE to evaluate the severity of conditions, considering
the combined effects of multiple deficient conditions, to determine both localized and overall
structural integrity.
Neither does the regulation define what constitutes a component. In the case of a riveted
deck plate girder span with an open deck, one bridge inspection program might attempt to
define the components to be the deck, superstructure, and substructure. FRA believes that
the deck, superstructure, and substructure are not components but rather groups of
components and would find this inadequate. Alternatively, a second program could break
down these global systems further to include ties, tie spacers, hook bolts, girders, cross
bracing, lateral bracing systems, abutments, piers, backwalls, and bridge seats. A third
program might break the girders down into even smaller elements such as top flange, bottom
flange, flange angles, web, intermediate stiffeners, bearing stiffeners, sole plates, and anchor
bolts. FRA expects, at a minimum, conditions to be assessed for all steel superstructure
components at the level of stringers, floor beams, floor system bracing, multi-beams, and
girders. For trusses, FRA expects that the truss be divided at a minimum into inspection
units consisting of upper chords, web members (hangers, diagonals, and posts), lower chords,
bearings, lateral bracing, sway bracing, and portals.
FRA would prefer that a report indicate the conditions of the individual elements making up
a primary load-carrying member; however, as long as sufficient narrative, sketches, or
photographs are supplied with the report to enable the reviewer to evaluate the severity and
extent of deficient conditions, compliance with the regulations would be achieved. FRA
would not expect a narrative for a member or component categorized as being in excellent or
good condition. However, once the condition drops to fair or worse, an indication of the
reason for that assessment is warranted and expected. If the track owner’s BMP and
associated bridge inspection program do not require such explanation, then the program is
defective.
In reviewing the adequacy of a bridge inspection report, the FRA inspector must compare a