Record Crack Opening and Vertical Offset as Separate Observations
A report can describe a narrow crack without establishing whether the surfaces on either side are at the same elevation. Before using the record to define a repair, distinguish the opening across the line from an offset between the adjoining surfaces. These observations can inform different questions even when both are reported in the same units.
Name the physical characteristic behind each value
FHWA’s archived pavement-distress manual treats crack width separately from faulting, which it describes as a difference in elevation across a joint or crack. That distinction is useful vocabulary, not a transfer of highway severity criteria to a building. An opening dimension describes a gap; an elevation difference describes the relationship between adjoining surfaces. Avoid combining them into a single spreadsheet field labeled crack size or assuming that one value can stand in for the other.
Keep the location and limits with the observation
Ask the report author which characteristic was actually assessed, where the observation applies and what reference or method supports it. Retain any stated direction with an offset rather than recording only an unexplained magnitude. A photograph showing the line from above may help locate it without establishing the elevation relationship. If that characteristic was not assessed, preserve it as unknown. Do not ask an unqualified occupant to make a demonstration or enter a restricted area to complete the table.
Connect the distinction to the proposed work
Clarify whether a proposal addresses an opening, an adjoining surface condition or another reviewed requirement. Filling a visible gap and changing a surface elevation are different scope descriptions; neither should silently acquire the other’s purpose. The responsible reviewer should determine which evidence and professional involvement the actual decision needs. Neither dimension alone establishes cause, structural adequacy, accessibility compliance or stability over time. A useful record keeps the relevant physical observations separate so the next repair discussion can address the condition that was actually documented.
Copyable worksheet
Use one row for each field. Mark unknown information clearly and retain the original records.
| Field | Your note |
|---|---|
| Crack or joint location reference | ____________________ |
| Opening-width observation and basis | ____________________ |
| Vertical-offset observation and direction | ____________________ |
| Unassessed characteristic or access limit | ____________________ |
| Repair question and responsible reviewer | ____________________ |
Worked example
Illustrative example: a fictional facilities report contains an opening-width observation beside a floor crack. Before requesting one repair scope, the manager asks whether the adjoining elevation relationship was assessed. The missing characteristic stays unknown rather than being entered as zero or inferred from an overhead photograph.