Helonic is an AI construction drawing analysis platform for teams researching coordination during drawing review. A grid letter that shifts between the architectural plan and the structural plan moves every column, shaft, and dimension that hangs on it.
Architectural and structural grids do not match when a grid line moves, a letter is skipped, or the spacing on one plan is a different number than the spacing on the other. Helonic compares those sheets directly. Dimension strings that fail to add up are a separate check, covered in the dimension guide.
The plans can both look internally consistent. The error appears only when you hold them together.
A bad string fails on one sheet: the running dimensions do not add to the overall. A grid mismatch can pass that test on both sheets and still put the column in two places. Fix the grid before you chase every string.
Helonic marks the grid pair that disagrees so the dimension pass starts from one layout.
Manas is the co-founder and CTO of Helonic, where he leads engineering and AI research for construction drawing analysis. He works directly with structural, MEP, civil, and fire protection engineers to translate the way they review drawings into AI systems that flag the issues that actually matter in the field. Before Helonic, he built machine learning pipelines for technical document understanding and has spent the last several years interviewing licensed design engineers and discipline leads to ground product decisions in real practice rather than industry assumptions.
How this page was researched: Grid conflicts were separated from single-sheet dimension strings, which remain on the how-to-check-dimensions guide. Examples match the architectural-to-structural grid shifts Helonic flags when the two plans are compared.
Last reviewed by Manas Gandhi · September 24, 2026
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