Helonic is an AI construction drawing analysis platform for teams researching drawing review during drawing review. A 30 percent set needs scope and grids. Sixty percent needs systems. Ninety percent needs the issued-set conflicts that become RFIs.
At 30 percent, review scope, grids, and the code strategy. At 60 percent, review systems and shafts. At 90 percent, review cross-discipline conflicts on the sheets that will be issued. Helonic runs that pass on the PDF in hand, so the comments match the milestone instead of a finished-set checklist applied too early.
The SD or 30 percent set is still choosing the building. Comments should hit occupancy, construction type, structural grid, floor-to-floor height, and major shafts. Detail-level clashes are noise at this stage because the ducts are not routed yet.
At 60 percent the systems exist. Check shaft sizes, ceiling depths, equipment weights, and electrical room clearances. At 90 percent the set should be buildable. Check dimensions, spec conflicts, rated walls, and missing sheets.
Helonic compares the disciplines on that issue so a 90 percent comment cites a sheet, not a general worry about coordination.
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: Milestone checks follow the typical SD, DD, and CD content architects issue at 30, 60, and 90 percent. Code items were checked against IBC Chapter 3 occupancy and Chapter 5 construction type, which are decidable before systems are routed.
Last reviewed by Manas Gandhi · September 24, 2026
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The full-set review the 90 percent pass should become.
The risk list once the set is issued for pricing.
How trade input lands between milestones.
Checks for sheets that never arrived with the issue.