Light Tower Inspections: UNI ISO 9712
ECO carries out status checks of various types of lighting towers in compliance with the UNI ISO 9712 standard on the different types of existing lighting towers:
LIGHT TOWER IN CONCRETE PLINTH
Light tower with polygonal section decreasing from bottom to top made up of several stems grafted into one another; the base shaft is embedded in the foundation plinth for about 2.5 meters.
LIGHT TOWER WITH BOLTS AT THE BASE
Light tower with polygonal section decreasing from bottom to top made up of several stems grafted into one another; the base shaft is integral with the foundation plinth by means of log bolts.
PAINTED STEEL TOWER IN CONCRETE PLINTH WITH FLANGED JOINTS AND PLATFORM AT THE HEAD
Round section roaster with several decreasing section drums joined by flanged joints usually with an intermediate and overhead walkable platform.
STATUS CHECKS
VISUAL EXAM
OUTER SURFACE
Control aimed at ascertaining the general state of conservation of the support.
Along the entire height of the support by means of an elevator basket, indicating any anomaly found on the metal surface, the wrong or missing identification reference of the pole in question, the state of the protective sheath and anything else worthy of reporting.
INTERNAL SURFACE
Control aimed at assessing the level and type of corrosion and the possible presence of stagnation water through the inspection hatch or by endoscopic analysis after drilling a hole.
POSSIBLE DISCONNECTION OF THE EARTH CABLE
Where accessible, as this connection could reduce the effectiveness of the measurements listed below.
MEASUREMENT OF THE CORROSION SPEED AND MAPPING OF CORROSION POTENTIALS AT THE BASE OF THE POLE, DIVIDING THE MEASUREMENTS ON FOUR CIRCUMFERENCE SECTORS
Analysis of the state of degradation of the structurally most stressed section of the post to the plinth; this shows the consumption of material and therefore of thickness (expressed in microns per year) at the aforementioned section. This survey also provides indications, through the electrochemical potential, of the tendency to corrosion of the pole and of environmental aggression. The examination is non-destructive as it does not involve any operation that varies the actual state of the support. This check also makes it possible to detect the state of corrosion of the external surface of the pole interlocking with the ground / concrete of the base.
THICKNESS EXAMINATION
This check returns the steel thickness values (expressed in mm).
Along the entire height of the support by means of a lift basket, in the points where it is deemed necessary for the characterization of the corrosive state. The choice of these points will be based on the construction characteristics of the pole, investigating the most critical and vulnerable areas, and on the external and internal visual analysis.
VERIFICATION USING NON-DESTRUCTIVE METHODS
Search for any defects in butt welds, along the longitudinal welds (barrel) and on the bolts using UT (Ultrasound Defectoscopy) – VT (Visual Testing) – MT (Magnetic Particles) methods according to the construction characteristics.
CHECK OF THE CONCRETE CONDITION OF THE BASE OF THE SUPPORT PLINTH
In order to identify any degradation / damage phenomena of the same.
CHECK OF THE CONDITION OF THE SHEATH (IF PRESENT) AND CHECK OF THE CORRESPONDENCE OF TYPE OF THE TOWER PROVIDED AND OF THE LOCATION
The results will then be reported in the report if anomalies are found with respect to the original planimetric data.