Shop Drawing Review That Compares Every Detail to the Contract Documents
Steel and rebar shop drawings carry hundreds of dimensions. Helonic checks every one against your design.
Structural shop drawing review is high-stakes detailed work. Every dimension on a steel erection drawing, every bar mark on a rebar shop drawing, every connection callout needs to be checked against the contract documents. The work is mechanical but the consequences of errors are large. Helonic gives structural engineers an AI reviewer that does the mechanical checks at machine speed, leaving the engineer to handle the items requiring judgment.
How Helonic helps
Dimension-by-dimension cross-check
Every dimension on shop drawings is cross-checked against the structural contract documents. Discrepancies surface as findings.
Connection design verification
Connection designs in shop drawings checked against design loads and detail requirements from contract documents.
Material grade verification
Steel grades, rebar grades, and concrete strengths checked against contract specifications.
Bar mark traceability for rebar
Every rebar bar mark traced from the shop drawing back to the design drawing.
Where shop drawing review goes wrong
Two failure modes dominate: time pressure leads to surface review that misses subtle deviations, or thorough review takes so long the project schedule suffers. Helonic eliminates the tradeoff - the mechanical comparison happens automatically, leaving review time for design judgment.
Shop drawing review workflow
Upload contract documents and shop drawings
Helonic indexes the contract set first, then the shop drawing submittal.
Run automated comparison
Every dimension, material grade, and connection callout cross-checked.
Review deviations
Findings ranked by severity - geometric deviations first, then material deviations, then notational discrepancies.
Stamp and return
Helonic suggests review comments. Engineer edits, stamps, and returns to GC.
Example issues Helonic catches
Real-world issues detected by AI analysis, specific to structural engineers running shop drawing review:
Beam B-12 in fabrication drawing shows length 35'-2" but contract drawing shows 35'-6"
Connection at grid C-3 in shop drawing uses 3/4" bolts but design connection callout requires 7/8"
Rebar bar mark 5#5 on slab shop drawing not found in the contract drawing bar schedule
Steel grade on plate detail callout ASTM A36 but contract spec section 05 12 00 requires A572-50
Precast wall panel P-12 erection drawing shows 16" clear cover at edge but design drawing shows 18"
Camber on W18x40 beam in shop drawing shown as 3/4" but contract drawing specifies 1"
Key features for this workflow
Steel fabrication drawing dimensional verification
Rebar shop drawing bar mark traceability
Precast erection drawing geometry check
Connection design adequacy verification
Material grade and certification check
Camber, tolerance, and erection sequence review
What construction professionals told us
“Structural engineers told us shop drawing review is the work most likely to cause sleepless nights - not because it's intellectually hard, but because a single missed deviation can result in fabrication errors and expensive remediation. They wanted help with the mechanical comparison.”
Conversations with structural engineers on commercial and institutional projects with high-volume shop drawing submittals.
FAQs
Does it handle scanned shop drawings?
Yes - Helonic uses OCR-aware document analysis that handles both digitally-generated and scanned PDFs.
Can it check connection design adequacy?
Helonic verifies that connections specified by the shop fabricator meet the design loads and detailing requirements in the contract documents. Substantive redesign of connections still requires engineer judgment.
What about non-conformance reports?
Helonic generates NCRs with citations to both the shop drawing and the contract document, ready for return to the fabricator.
Manas Gandhi
Co-founder & CTO, HelonicManas 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.
- AI for technical document understanding
- Cross-discipline coordination workflows
- Code compliance automation (IBC, NEC, NFPA, IPC, IMC, ASCE)
- Structural and MEP drawing review systems
How this page was researched: Conversations with structural engineers on commercial and institutional projects with high-volume shop drawing submittals.
Last reviewed by Manas Gandhi · May 2026
Other use cases for structural engineers
Shop Drawing Review for other roles
Try Helonic on shop drawing review for your next project
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