Guidelines for Inspection and Maintenance of Bridges
1990 Edition

The scope defines the parameters for collecting and recording bridge data to facilitate maintenance and evaluation. It includes key elements such as design velocity, discharge values, low water levels, scour depths, foundation characteristics, bridge gradients, widths of road and footpaths, total deck width, approach roadway dimensions, exposure and navigability conditions, clearances, and the number of spans. Specific data coding fields are suggested for inventory management, supported by appendices detailing formats for major and minor bridges as well as specimen forms. The conceptual workflow for data collection flows from bridge identification to maintenance planning.

This section describes a structured methodology for overseeing bridge assets, emphasizing integration of inventory, inspection results, load evaluations, and maintenance scheduling. The bridge management process covers data acquisition, condition assessments via inspections, load rating based on standard models, and prioritizing maintenance actions according to condition and risk factors. Formulas for permissible load and bridge rating factor are provided, alongside classification tables to determine maintenance urgency.

Outlined are the typical steps for inspecting bridge structures, including visual examination, measurement of cracks and corrosion, non-destructive testing when necessary, and thorough documentation of defects. Inspection data should record defect locations, severity, environmental factors, and observed load effects. Routine inspections are generally scheduled every six months to one year. A standardized inspection proforma is recommended to ensure consistent data capture.

Maintenance operations cover routine tasks such as drainage cleaning and crack sealing, periodic maintenance including resurfacing and structural repairs, and preventive activities aimed at extending pavement life. Specifications highlight inspection frequencies and material usage, with tables illustrating maintenance activities and their recommended intervals. A decision flowchart guides the selection of maintenance type based on observed condition.

Though detailed methods are referenced in separate documents, general principles include assessing load carrying capacity through inspections and analysis, followed by application of repair techniques such as crack injection, surface patching, strengthening with steel plates or FRP wraps, and jacketing columns or beams. Formulas for flexural strengthening incorporating FRP are provided. Material specifications align with relevant Indian Standards.

This part emphasizes the necessity for extensive research, categorized into physical maintenance studies focusing on materials and repair methods, and non-physical investigations covering cost, policies, and organizational practices. Bridge inventory data supports maintenance planning and service level definitions. Existing gaps between current and ideal practices underscore the need for ongoing research and development, supported by specified documentation formats.

Focuses on systematic recording of bridge attributes, including state, road category, location chainage, structure type, bridge length, number of lanes, load rating, design loading, deck width, and span count. The methodology supports identifying substandard bridges, maintenance planning, and defining service levels. Use of standardized forms for major and minor bridges is advised for consistent data management.

Recommends standardized reporting formats capturing structural types, construction details, utility services, inspection dates, condition summaries, and maintenance history. Emphasizes the importance of photographic evidence and comprehensive logs to support database entries and generate reliable reports that facilitate bridge management.

Highlights the requirement for skilled engineers and trained technicians performing maintenance tasks. Advocates regular specialist-led training, practical courses, and short-term programs when new methods or materials are introduced. Safety equipment such as protective clothing, helmets, masks, eye protection, and safety belts are mandatory, especially when working at heights, confined spaces, or over water. Maintenance personnel should be insured, and detailed manuals with clear instructions are recommended.

Refers to specialized inspection practices, particularly concrete inspection per ACI SP-2, covering concrete quality, reinforcement placement, and curing. Details standard tests like slump tests and compressive strength assessments, alongside reinforcement checks. Visual inspections for deterioration are to be conducted regularly with documented criteria.

Although detailed procedures are found elsewhere, the code advises evaluating load capacity prior to strengthening. Factors considered include bridge length, materials, carriageway width, and structural type. Strengthening options such as jacketing, external prestressing, and element replacement are mentioned. Documentation formats are provided for recording bridge data and condition.

Contains a detailed inventory format supporting uniform bridge data recording, including fields for bridge location, construction year, dimensions, load ratings, scour levels, bearings, corrosion protection, and remarks. This systematic approach aids in efficient data management and supports maintenance and inspection activities.

Includes practical tools and templates such as inventory forms for major and minor bridges, lists of inspection and maintenance tools, and standard testing procedures. These resources facilitate structured data collection, condition assessments, and maintenance planning in accordance with the code.