What It Means
The NBI rating scale ranges from 0 to 9: 9 = Excellent, 8 = Very Good, 7 = Good, 6 = Satisfactory, 5 = Fair, 4 = Poor (structurally deficient threshold), 3 = Serious, 2 = Critical, 1 = Imminent Failure, 0 = Failed/Out of Service. Ratings 7-9 indicate a bridge in generally good condition. Ratings 5-6 indicate minor problems. Ratings 4 and below trigger the structurally deficient classification and require more frequent inspections.
Frequently Asked Questions
What does "NBI Rating Scale (0-9)" mean?
The standard 0-9 scale used by FHWA inspectors to rate bridge component conditions.
Why does NBI Rating Scale (0-9) matter for bridge safety?
The NBI rating scale ranges from 0 to 9: 9 = Excellent, 8 = Very Good, 7 = Good, 6 = Satisfactory, 5 = Fair, 4 = Poor (structurally deficient threshold), 3 = Serious, 2 = Critical, 1 = Imminent Failure, 0 = Failed/Out of Service. Ratings 7-9 indicate a bridge in generally good condition. Ratings 5-6...