The Corrosion Severity Factor (CSF) was developed to enable the inspector in the field to easily transmit a description of the corrosion condition of a buried steel tower anchor. The CSF is determined by the following criteria
The CSF Rating is determined by the worst part of the anchor!
Galvanizing in tact, no signs of rust, no cross sectional material loss. Anchors rated CSF 1 should be monitored in the future during regular tower inspections.
Galvanizing slightly to mostly gone, rust spots prevalent, minor pitting or flaking, no cross sectional material loss. Additional corrosion control is highly recommended.
Galvanizing mostly to completely gone, heavily corroded, deep pitting, large areas of flaking, measurable cross sectional material loss. Anchors rated CSF 3 require additional corrosion control methods and may require repair or replacement.
Replacement may be warranted. The CSF can help you determine the necessity of installing AnchorGuard®. If a CSF of 2 is found at a depth of two feet below grade, AnchorGuard is recommended. When a CSF of 3 or higher is found at a depth of two feet below grade on any tower, further inspection is highly advisable and installation of AnchorGuard is recommended.