The preflight check for your drawing set

Catch it on paper, not on site.

PreflightSet reviews your construction documents before bidding or construction and finds where they disagree: one drawing against another, the drawings against the 3D model, the schedules against the plans.

For real estate developers, general contractors and the trades who coordinate drawings. Starting with New York high-rise and mid-rise residential.

Request a review See an example finding
A-201 · Level 1 plan2 findings on this sheet
1234 OFFICE 104BATHSTOR. 105CORRIDORSTAIR 1 104 T-4 F-07 F-11
Illustrative drawing. Every finding is boxed on the sheet where it happens.
The problem

Drawing sets reach the site with conflicts. Each one costs time and money there.

RFI A formal question to the architect Work waits on the answer, and the answer often changes the drawings.
Change order Work priced again, after the bid Rework, re-ordered material and schedule slip, paid for at site rates.
Field decision A call made on site, under pressure Fast, but undocumented, and sometimes wrong.
How it works

Send the set. Get back a list of what to fix.

  1. 01 Send your set The drawing PDFs, and the IFC model if you have one. Any stage: DD, permit or bid set.
  2. 02 It's reviewed Every check runs across the whole set, and each finding is reviewed against the drawings before it reaches you.
  3. 03 Work through findings online Sign in, see each finding on the sheet, and track what's been asked and what's resolved.
  4. 04 Export an RFI list The questions for the architect, with sheet references, ready to send.
What it checks

The whole set, checked against itself.

Drawing against drawingPlans, sections, elevations and details that should agree with each other.
Schedules against plansWhat the drawings call for against what the schedules list.
Marks and referencesEvery mark, callout and reference points to something that exists.
Drawings against the modelThe 3D model laid over the drawings, and the places where they differ.
Example findings

Every finding comes with its evidence.

The exact place on the drawing, both sources side by side when they disagree, and what it means in plain language.

F-07 High Open Architecture · illustrative example

Door 104 is 3'-0" wide on the plan but 2'-10" in the door schedule

A-201Floor plan
3'-0" 104 OFFICE
A-601Door schedule
DOORWIDTHHEIGHTTYPE 1033'-0"7'-0"A 1042'-10"7'-0"A 1053'-0"7'-0"B 1063'-0"7'-0"A
What the drawings say The plan dimensions the opening at 3'-0". The schedule lists the door at 2'-10".
If it isn't fixed The frame is ordered from the schedule and won't fit the framed opening.
Ask the architect Which width is correct for door 104, and which sheet will be revised?
F-12 Medium Open HVAC · illustrative example

A 400x250 branch duct on the HVAC plan is missing from the 3D model

M-201HVAC plan, level 2
600x300 400x250 CORRIDOR CONF. 210
3D modelSame area, ducts in teal
600x300 CORRIDOR CONF. 210 no duct
What the drawings say The HVAC plan shows a 400x250 branch from the main duct into Conference 210. The 3D model has the main duct but no branch.
If it isn't fixed Coordination runs on the model, so the branch is never checked against the beams and pipes it crosses. The conflict shows up on site.
Ask the design team Is the branch still in the design? If so, please add it to the model.
Request a review

Have a set going out soon?

We're taking on a small number of projects as early design partners. Tell us about yours: the building, which set, and when it goes out.

Email hello@preflightset.com