As-built conversion from Scanning or Measurement

An as-built conversion turns whatever record of a building you already have into an accurate, usable set of drawings or a model. Scan to BIM is one route into that, the one that starts from a laser scan. The other routes are field measurements taken by hand, old paper drawings, scanned PDFs, photographs, and drone imagery. The output is the same in both cases: a coordinated representation of the building as it stands today, in the format your project needs. The choice between them is about the input you have, the accuracy the project demands, and whether anyone can get into the building. Firms often mix the two, scanning the complicated areas and measuring the simple ones. We staff both, and the modeling work afterwards is identical. Tell us what you have in hand and we will say which route the project actually needs.

Yes, and that is the more common starting point than a scan. A usable package is a field measurement set with dimensions and photographs. Add whatever original drawings survive, even if they are a scanned set from 1978. From that a modeler rebuilds the plans, elevations, and sections as a coordinated set, flagging the areas where the source is thin. The flagging matters as much as the drawing. A model that hides which walls were measured and which were assumed is a model nobody can rely on. Where the record is too weak in one area, the answer is a list of what to go back and verify, not a guess that fills the gap. Older documents also carry drawing conventions and units that need care during conversion, especially on sets that pre-date current code cycles.

Existing floor plans, reflected ceiling plans, elevations, building sections, and enough detail to show what is being kept, removed, and replaced. Most jurisdictions also want a demolition plan alongside the existing conditions, and an accessibility review of what the renovation touches. Structural, mechanical, and life safety elements come in when the scope reaches them. Exactly what is required is set by the authority having jurisdiction and by the code cycle it has adopted. Those cycles are published by the ICC and amended state by state. We produce the drawings to your standards and your title block. What we do not do is submit them, pursue the permit, or seal anything. Your licensed architect of record signs and files, exactly as before. Confirming the adopted code cycle before drawing starts is what keeps a set from being redrawn after the first review.

They get documented as a discrepancy, not quietly corrected. That case is the normal one rather than the exception, and how it is handled is what separates a useful as-built from a decorative one. The modeler builds to the measured or scanned condition, then records where the record drawings disagree and by how much. Those notes come back to your team as a list, so your project architect decides what matters. A shifted partition may be irrelevant. A column that is not where the old set says it is changes the design. Where the evidence is genuinely inconclusive, the model says so instead of picking one. Because the professional works your hours, that call happens in a same-day conversation. It does not turn into a comment thread stretched over two nights and a misunderstanding.

The quality of the input first, the required accuracy second, and building complexity third. A clean registered scan of a simple rectangular building moves quickly. A stack of partial PDFs from three different decades, covering a building that has been altered twice, does not. Scope is the other multiplier: modeling architecture only is a different job from modeling architecture plus structure plus every mechanical run above the ceiling. So is the level of accuracy you agree, since preserving real deviation takes longer than idealizing it. A sample tells you more than a page count, so scope one floor with the source material in hand. That produces a real number instead of a range. A quote given without that sample is a guess dressed up as a number.