Attachment 5 - The Impact of Load Rating Methods on Federal Bridge Program Funding - Bridge - FHWA

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The Impact of Load Rating Methods on Federal Bridge Program Funding
FHWA May 2005 (revised February 2006)

Attachment 5: NBI Item 67 revised for Rating Factor

Item 67 - Structural Evaluation (cont'd)

Table 1. Rating by Comparison of ADT - Item 29 and Inventory Rating - Item 66
Structural Evaluation Rating Code	Inventory Rating
	Average Daily Traffic (ADT)
	0-500	501-5000	> 5000
9	> 32.4 (MS18)*	> 32.4 (MS18)	> 32.4 (MS18)
8	32.4 (MS18)	32.4 (MS18)	32.4 (MS18)
7	27.9 (MS15.5)	27.9 (MS15.5)	27.9 (MS15.5)
6	20.7 (MS11.5)	22.5 (MS12.5)	24.3 (MS13.5)
5	16.2 (MS9)	18.0 (MS10)	19.8 (MS11)
4	10.8 (MS6)	12.6 (MS7)	16.2 (MS9)
3	Inventory rating less than value in rating code of 4 and requiring corrective action.
2	Inventory rating less than value in rating code of 4 and requiring replacement.
0	Bridge closed due to structural condition.

*MS Designation (typical)

Item 67 - Structural Evaluation (cont'd) (Revised for Rating Factor)

Table 1. Rating by Comparison of ADT - Item 29 and Inventory Rating - Item 66
Structural Evaluation Rating Code	Inventory Rating
	Average Daily Traffic (ADT)
	0-500	501-5000	> 5000
9	> 1.00	> 1.00	> 1.00
8	1.00	1.00	1.00
7	0.86	0.86	0.86
6	0.64	0.64	0.64
5	0.50	0.50	0.50
4	0.33	0.33	0.33
3	Inventory rating less than value in rating code of 4 and requiring corrective action.
2	Inventory rating less than value in rating code of 4 and requiring replacement.
0	Bridge closed due to structural condition.

This page last modified on 09/11/06