Practical service life
The time until 5% to 10% coating breakdown occurs and active rusting of the substrate is present.
The atmospheric conditions that exist at the site of the project, expressed in terms of rural, urban, industrial, and marine; based on the level of aggressive contaminants/pollutants such as chlorides, sulfur dioxide, and salinity.
Structure multiplier< br/>Applied to the field labor cost to account for height of the structure; differs for simple and complex structures.
Size of job multiplier
Applied to the total field and shop costs.