Highway & Bridge Inspection Procedures Flashcards

What does a negative superstructure appraisal rating of N3 (N/A) signify in the NBI coding system?

Answer: The structure has no deck, such as a culvert

NBI code N for superstructure appraisal indicates not applicable, used for structures like culverts that have no conventional superstructure.

During highway pavement inspection in Kansas, which distress type is characterized by interconnected cracks forming polygonal shapes?

Answer: Block cracking

Block cracking forms interconnected cracks creating large rectangular or polygonal blocks, typically caused by asphalt shrinkage rather than load fatigue.

A KDOT inspector is checking expansion joints on a bridge during summer. Joints that appear completely closed should prompt concern about:

Answer: Potential for bridge deck buckling during further heating

When expansion joints close completely in summer heat, there is no remaining capacity to accommodate further thermal expansion, risking buckling of the bridge deck.

Which fracture-critical member (FCM) designation means that failure of the member would likely cause collapse of the bridge?

Answer: Non-redundant steel tension members

Fracture-critical members are non-redundant steel tension members whose failure would likely cause a portion of or the entire bridge to collapse.

When inspecting approach slabs on a Kansas highway bridge, settlement or 'bump at the end of the bridge' most often results from:

Answer: Consolidation or erosion of fill beneath the slab

Settlement of approach slabs typically results from consolidation, erosion, or washout of the embankment fill beneath the slab, creating a void.

In the KDOT inspection rating system, a culvert rated with an NBI Item 62 score of 6 would be described as:

Answer: Satisfactory condition

NBI condition rating 6 (Satisfactory) indicates some minor problems but the structural element is functioning adequately without significant concern.

During a scour critical bridge inspection, what is the inspector's first priority when scour is observed near a foundation?

Answer: Document the scour depth and notify KDOT bridge management

The inspector must document scour observations with measurements and photographs, then notify KDOT bridge management to determine if action plans need activation.