The Problem
Revisions aren't one change — they're dozens across multiple sheets.
- Changes hidden across drawings
- Manual overlay comparisons
- High risk of missed modifications
- Rework late in the bid process
With Ferra
Ferra compares full drawing sets and surfaces real structural changes instantly.
- Identify changes across beams, columns, and notes
- See exactly what moved, changed, or was added
- Update your estimate with confidence
Core Capability
See exactly
what changed — instantly
Ferra compares full drawing sets and identifies structural changes at the element level — not just visual differences.
Protect margin
across every revision
Reduce Manual Time
Less time navigating sheets by hand
Improve Accuracy
Detection across every sheet, not just sampled ones
Minimize Missed Elements
Connected views mean nothing slips through
Focus on Higher-Value Work
Estimators spend time on judgment, not counting
Real change detection.
Not linework diffing.
Side-by-Side Comparison
Original and revised drawings overlaid. Color-coded changes visible at a glance — no manual hunting.
Revision Summary Panel
Total changes categorized by type. Structural changes caught across all sheets — without re-doing the takeoff.
Overlay Diff View
Every structural change color-coded across the full drawing. Added, removed, and modified elements are instantly distinguishable.
Revision Analytics
Change volume tracked across every revision. Understand how scope has shifted from issue to issue at a glance.