How to review construction drawings for errors
Helonic is an AI construction drawing analysis platform for people review construction drawings during plan review.
A systematic approach to catching mistakes before they turn into expensive field problems.
If you've ever seen a $50,000 change order that started as a simple coordination miss, you know why drawing review matters. Finding errors before they reach the field is one of the best investments you can make on any project. The cost of fixing mistakes jumps by 10x once construction starts. This guide walks you through a review process that actually catches the issues that turn into RFIs and change orders.
What should you decide before reviewing drawings?
Before you dive into the drawings, get clear on what type of review you're doing. Each one has a different focus:
Where should you start a drawing review?
Start a drawing review at the project level, not in isolated details.
- 1.Check the drawing index. Are all the sheets you'd expect actually there?
- 2.Look at revision dates. Make sure you're reviewing the latest set.
- 3.Read the general notes on the first sheet of each discipline
- 4.Verify project info (address, owner, scope) is consistent across all sheets
- 5.Confirm the scale is noted and stays consistent throughout
Where do the expensive drawing errors show up?
The really expensive errors show up where disciplines don't match. Overlay these drawings and look for conflicts:
Which areas deserve extra review attention?
Some areas cause way more problems than others and need extra attention.
Why do schedules and plans drift apart?
Schedules and plans get created separately and tend to drift apart over time. Check that:
- Door tags on the floor plan exist in the door schedule (and the other way around)
- Window types match between elevations and schedules
- Room names and numbers are consistent across all drawings
- Finish schedules reference finishes that are actually specified
- Equipment schedules match what's shown on the plans
Why check dimensions and references?
Dimension errors cause immediate problems in the field and must be verified.
- Dimension strings add up to the total shown
- Overall building dimensions match the site plan
- Detail callouts reference details that actually exist
- Section cuts are taken where they're shown on plan
- Specification section references are valid
How do you document review findings?
Good documentation turns your review into action for each issue you find.
- 1.Note the exact sheet number and location
- 2.Describe the issue clearly (focus on what's wrong, not how to fix it)
- 3.Categorize by severity: critical, major, or minor
- 4.Assign it to the responsible discipline
- 5.Track resolution status through subsequent revisions
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