Farm equipment, generally referred to as “implements of husbandry” (IoH), has been considered to be local vehicles on farms that do not use public roads often, if at all. As a result, state and local jurisdictions vary widely in managing IoH. Apparently, the growth of IoH has far outpaced that of other legal highway vehicles, warranting concern with bridge safety.
The TRB National Cooperative Highway Research Program's NCHRP Research Report 951: AASHTO Load Rating Provisions for Implements of Husbandry (1) proposes new IoH load-rating provisions for the AASHTO Manual for Bridge Evaluation in load factor rating and load and resistance factor rating (LRFR), along with related revisions to the AASHTO LRFD Bridge Design Specifications; and (2) develops protocols to evaluate IoH with various configurations for load rating and overload permits.
Table of Contents
|Chapter 1 - Background and Report Organization||1-2|
|Chapter 2 - Research Approach||3-4|
|Chapter 3 - Findings and Applications||5-100|
|Chapter 4 - Conclusions and Suggested Research||101-101|
|Appendix A - Protocols for Load Rating Bridges for Implements of Husbandry||107-136|
|Appendix B - Proposed AASHTO Guide Manual for Bridge Evaluation for Implements of Husbandry||137-137|
|Appendix C - Implementation of Research Findings and Products||138-138|
|Appendix D - Questionnaires Used in Survey||139-146|
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