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SIIMS

Resources and information

Federal Highway Administration (FHWA) Memoranda1985 - Permits over 80,000 pounds allowed on Interstate highways 1993 - Requirements for using Load Factor Rating Method 2004 – Rating Method codes for NBI reporting 2006 – When can ASR vs. LFR vs. LRFR be used 2011 - Revisions to NBI items 31, 63, and 65 2011 – Revision to Rating Method codes for NBI reporting

National Bridge Inspection Standards (NBIS)NBIS Metrics NBIS 2005 FHWA's FAQ on the NBIS Recording and Coding Guide for the Structure Inventory and Appraisal Errata - June 2012 Errata - February 2018 Input Procedures for FHWA Metrics

Underwater Inspection Procedures Wading Inspection Procedures Diving Inspection Procedures

Load Ratings for Standard BridgesPhase 1 – 1982 ASR Rating Method Phase 2 – 1991 ASR Rating Method Phase 3 – 1998 ASR Rating Method Phase 4 – 2008 LFR Rating Method Phase 5 – 2016 LFR Rating Method Amendment to Phase 4 for SHV ratings Concrete Box Beam Standards Phase 6 - 2021 Load Rating for Standard Bridges

Load Ratings for Standard Culverts2012 Cast in Place Culvert LRFR Ratings 2013 Single Precast RCB Std LRFR Ratings 2020 Cast in Place Culvert LRFR Ratings 2020 Single Precast RCB Std LRFR Ratings

Load Rating Tools for Concrete Box CulvertsLRFD CIP Reinforced Concrete Box Culvert Program

LARS Input and File Upload RequirementsLARS Input Spreadsheet LARS Consultant Requirements

Iowa DOT Maintenance and Inspection ManualsBridge Inspection Manual Bridge Maintenance Manual Bridge Rating Manual Emergency Response Manual

Training videos Finding Structures Information Available in SIIMS for Structures Data Update Inspection Type Under Water Inspection Form

Other informationListing of Bridge Inspection Agencies County and City Engineer's Form 107 Download Instructional Memorandum 7.020 Bridge Inspections SIIMS implementation for local agencies SIIMS implementation for consultants

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