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A condition inspection of protective coatings on structural steel. Record the structure, the coating system, when it was last coated, the ISO 12944 corrosivity category if known and the access available. Then add each area or member by its gridline or mark: the coating breakdown and corrosion seen, the extent, where on the member it is, a dry film thickness reading if measured, any visible loss of steel and a priority, with photos. The form counts areas with loss of section and areas referred to an engineer, and records what could not be seen. An optional Walk Cam route films the structure, coating breakdown, a connection and a column base. Every question is listed below, and you can fill the live form in on this page.
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Which structure and members were inspected, the coating system and the environment, what breakdown and corrosion were found and where, any readings taken, what could not be seen, and the actions with owners and dates. steelconstruction.info says records of all aspects of inspection, along with any problems, should be made. ISO 12944 classifies the corrosivity of environments from C1, such as heated offices and schools, to CX, such as offshore areas.
Last updated . Facts checked by the SiteSurvey team on 17 October 2026 against steelconstruction.info: corrosion protection of structural steel (ISO 12944 categories), steelconstruction.info: influence of design on corrosion and steelconstruction.info: inspection and quality control of coatings.
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Want to see one filled in? See a completed coating inspection report (PDF), made by SiteSurvey from a fictional site visit.
Walk Cam route · four guided clips
Film the steelwork from a member reference to the places coatings fail first: flanges, bolts, edges and bases.
Record the structure, gridline or member mark, date and access limits. Move from the whole frame to coating breakdown and corrosion without scraping or touching. The four AI-generated clips illustrate one route, not a real structure.
Film the steelwork with a gridline, bay or member mark in view before any close up.
Painted structural steel columns and beams in an industrial building are shown in a wide view.
Show blistering, flaking or chalking on the coating with the member still identifiable.
Blistered and flaking paint is visible on a lower steel flange.
Film bolts, welds and edges, where coatings usually fail first, without scraping or touching.
Rust staining runs from the bolts of a beam to column connection.
End at the column base or the hardest place to reach, and say what could not be seen.
Corrosion is visible where a column meets the concrete floor.
A fictional six-page example with the four points, twelve stills from the clips, observations, follow-up actions and the limits of a visual record.
View the visual evidence (PDF) ↗ · Download the full sample report
A video shows visible coating condition. It does not measure film thickness, adhesion or section loss, and it does not grade rust or blistering to a standard; those need a qualified coating inspector and the right instruments. Example footage was generated in Google Flow and the observations are scripted; no real site is shown. Walk Cam works inside any form in the app. How Walk Cam works · All visual inspections
A protective coating and corrosion inspection of steelwork: structure, coating system and corrosivity category, each area or member with breakdown, corrosion, where it is, film thickness if measured, priority and photos. 3 sections and 50 questions. Follow-up questions and guidance appear only when an answer calls for them, so the person on site never sees the ones that do not apply.
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Mark it at the structure, useful for tanks, gantries, bridges and yards. Tap Mark current location on site. It saves the coordinates, a grid reference and the accuracy.
From the coating specification. The form compares readings with it and sets no figure of its own.
Record estimated current conditions and add what you observe on site.
Measure from a square-on photo with a rule taped to the member, or the member's known flange width, as the reference, or use a tape. Measuring from a photo gives an estimate.
Optional. Film the four guided points on the SiteSurvey app; each clip keeps its spoken note.
Set by the coating specification, the maintenance plan or the duty holder.
This is a condition record, not a coating specification, a structural assessment or a rust or blister grading to a named standard.
Member, breakdown seen and where on the member
Identify each member by gridline or mark before describing it. Record what was seen and measured, and say what could not be seen.
Column B3: rust staining and pitting at the base plate, in a water trap by a downpipe. Visible loss of section, referred to a structural engineer.
Fictional example of record wording. Use the actual evidence and approved arrangements for your job; this is not a completed report or an instruction to carry out the work.
A completed coating inspection report, made by SiteSurvey from a fictional site visit: every answer, the photos, the guidance that applied and the sign-off, ready to send as a PDF.
No. It is for protective coatings on steelwork, where the concern is corrosion. For the appearance of decorative paint finishes, use a paint finish inspection.
steelconstruction.info lists six, from C1 very low to CX extreme. Examples run from heated buildings with clean atmospheres (C1) and unheated buildings where condensation can occur (C2) to industrial and coastal areas with high humidity or salinity (C5) and offshore areas (CX).
steelconstruction.info says structures with many small components and fasteners are harder to protect than large flat surfaces, crevices hold water and cause crevice corrosion, and water and dirt traps accelerate corrosion. The form records whether breakdown is on flat surfaces, edges, welds, bolts, crevices, bases or water traps.
Record it against the member. The form shows a red warning to refer it to a structural engineer before the coating is repaired, and counts how many areas have visible loss of section.
steelconstruction.info says inspectors should be trained in recognised practices and certified, and that the Institute of Corrosion runs a certification scheme for painting and coating inspectors in the UK.
On the SiteSurvey app, the optional Walk Cam route films the steelwork with a gridline or member mark in view, coating breakdown, a bolted connection and a column base, each with your spoken note. It shows the condition; it does not measure film thickness.
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