Steel & Concrete Assessment
Osmose steel and concrete inspection programs identify and assess deterioration on steel structures to prioritize those in need of repair and corrosion mitigation, helping utilities avoid future, costly replacements.
While steel remains an excellent choice for utility poles, it tends to degrade over time due to corrosion and mechanical damage. It is recommended to conduct an assessment of steel structures at regular intervals. An expert corrosion inspector is equipped to look into age, other structure characteristics, and environmental conditions and then identify areas of concern.
Comprehensive Inspections vs. Predictive Inspections
During a comprehensive inspection, each leg of the structure is typically excavated to an approximate depth of 450 to 600mm. This is the ideal inspection method for obtaining structural condition information in the critical transitional zone of the steel structure, and it allows for protective coatings to be applied.
During a predictive inspection, environmental corrosion indicators are also collected. Based on those findings, a forecast is made as to the condition of the structure. Predictive inspections provide an effective, less costly approach that targets “the worst of the worst” conditions on a structure.
Structural Ratings & Corrosion Potential Assessment
The assessment process involves both a structural and a corrosion potential evaluation. During the structural assessment, each foundation member of each tower is assessed and assigned a structural rating based on the extent of existing corrosion.
During the corrosion potential assessment, each structure is evaluated and given a rating based on the likelihood of future corrosion. This comprehensive rating is indicative of its current corrosive condition and its potential for future deterioration based on environmental factors.
All relevant data, both structural and environmental, collected during the assessment process is recorded and delivered to the utility. Customers receive data, as well as project summary reports, which summarize the findings and provide recommendations for logical and cost-effective next steps.
Accurate, comprehensive data removes the guess work, allowing customers to address priority concerns immediately and design a condition-based assessment and mitigation program for the second cycle. Most customers find that lifecycle costs diminish substantially in the second assessment cycle, while service life and reliability are enhanced.
Non-Destructive Evaluation (NDE) Options
When non-destructive evaluation of an asset is necessary, Osmose technicians utilize Electromagnetic Acoustic Transducer (EMAT) technologies to help identify below-grade structural defects. These proprietary technologies are specialized NDE methods designed to estimate the extent of the defects. EMAT technologies are particularly useful for inspecting structures that cannot be excavated, or for structures that have been classified as having severe corrosion potential and require further evaluation without the risk of excavation. Data compiled from the NDE field inspections is validated by means of a separate engineering analysis and delivered via written report to the customer as their final deliverable.
Steel Pole & Tower Restoration
Whether secured by a concrete foundation or direct-buried in soil or water, Osmose provides engineered repair solutions for damaged steel towers and poles. At a fraction of the cost of replacement, these repair solutions restore original strength and can even increase capacity when greater strength is required.
Structural Steel Repair
Osmose structural steel repair is designed and implemented to American Society of Civil Engineers (ASCE) 10 specifications. For our Australian customers, these repairs are designed to AS/NZS 3995. Our services provide:
- Benefits of repairs include:
- Corrosion rehabilitation to restore original strength
- Structure is temporarily supported and lines remain in service
- Poles and towers receive structural updates
- Before and after images of steel poles that received repairs
Concrete Foundation Repair
Osmose concrete foundation repair is designed and implemented to American Concrete Institute (ACI) standards. For Australian customers, AS/NZS 3600 and AS/NZS 7000 is applicable. Our services provide:
- Concrete repair or replacement
- Capacity increases
- Before and after images of structural concrete repair